HOST LISTS AND KEYS FOR EACH PLANT GENUS

(in alphabetical order)

Tab-Tox

Tabebuia

Tabernaemontana

Taeniatherum

Tagetes

Talguenea

Talinum

Tamarindus

Tamarix

Tanacetum

Tapinanthus

Taraxacum

Tarenna

Tauscheria

Taxillus

Taxodium

Taxus

Teclea

Tecoma

Tectaria

Tectona

Teesdalia

Telekia

Teline

Tellima

Telosma

Tephroseris

Tephrosia

Terminalia

Ternstroemia

Tessaria

Tetracera

Tetraclinis

Tetradenia

Tetradymia

Tetragonocalamus

Tetragonolobus

Tetramolopium

Tetrapanax

Teucrium

Thalia

Thalictrum

Thamnocalamus

Thamnoseris

Thapsia

Thaspium

Thaumatococcus

Thea

Thelepogon

Thelesperma

Thelymitra

Thelypteris

Themeda

Theobroma

Thereianthus

Thermopsis

Thesium

Thespesia

Thevetia

Thinopyrum

Thlaspi

Thrincia

Thuidium

Thuja

Thujopsis

Thunbergia

Thunia

Thymbra

Thymus

Thyrsostachys

Thysanolaena

Tiarella

Tibouchina

Tidestromia

Tigridia

Tilesia

Tilia

Timonius

Tinnea

Tinospora

Tipuana

Tithonia

Tocoyena

Toddalia

Tolmiea

Tolpis

Tomentypnum

Toona

Tordylium

Torenia

Torilis

Tormentilla

Torralbasia

Torreya

Torreyochloa

Torrubia

Tortella

Tortula

Tournefortia

Townsendia

Toxicodendron

Toxicoscordion

Tabebuia Bignoniaceae
Tabebuia angustata Aphis gossypii
T. avellanedae = Handroanthus impetiginosus
T. chrysotricha = Handroanthus chrysotrichus
T. heterophyllaAphis craccivora, gossypii
T. impetiginosa = Handroanthus impetiginosus
T. leptoneuraAphis gossypii
T. pallidaAphis gossypii
T. roseaAphis spiraecola; Myzus persicae

Use key to polyphagous aphids.

Tabernaemontana (including Conopharyngia, Ervatamia, Sarcopharyngia) Apocynaceae
Tabernaemontana africana Sitobion krahi
T. albaAphis aurantii, nerii
T. amblyocarpa = T. alba
T. chippii = T. africana
T. coronaria = T. divaricata Aphis gossypii;
T. divaricataAphis gossypii, spiraecola; Myzus persicae

Use key to apterae on Rauvolfia.

TaeniatherumPoaceae
Taeniatherum caput-medusae Rhopalosiphum padi
(or use key to apterae of grass-feeding aphids under Digitaria)
TagetesAsteraceae
Tagetes erectaAphis craccivora, fabae, gossypii, odinae;
Macrosiphum euphorbiae; Myzus persicae;
Prociphilus erigeronensis; Uroleucon ambrosiae
T. lunulataGeopemphigus torsus
T. minutaAphis spiraecola; Aulacorthum solani;
Macrosiphum euphorbiae; Uroleucon compositae
T. patulaAphis fabae, gossypii, nasturtii, odinae, spiraecola;
Aulacorthum solani; Brachycaudus helichrysi;
Macrosiphum euphorbiae; Myzus ornatus, persicae;
Neomyzus circumflexus
T. tenuifoliaBrachycaudus helichrysi; Myzus persicae
Tagetes spp.Neotoxoptera oliveri; Geopemphigus blackmani(?)

Key to apterae on Tagetes:-

1 ANT PT/BASE less than 0.5. SIPH absent. (These characters must also apply: body sparsely hairy, head with dorsal wax plates, and R IV+V with 2-10 accessory hairs) …..2
Either ANT PT/BASE more than 1.5 and SIPH present, or bracketed characters not in that combination…..go to key to polyphagous aphids
2 Abdomen with a dark posterior extension of cauda and anal plate, which is strongly convex. R IV+V 0.95-1.2 × HT II and bearing 4-10 accessory hairs. (Al. sexupara without dark dorsal abdominal cross-bands).….Prociphilus erigeronensis
Cauda and anal plate not on a dark posterior extension of the abdomen. (Cauda very small, and anal plate divided into dorsal and posterioventral parts by a marked concavity.) R IV+V 0.74-0.96 × HT II, with 2 accessory hairs. (Al. sexupara with dark cross-bands on ABD TERG 3-8)…..Geopemphigus sp.(p)
Talguenea = TrevoaRhamnaceae
Talguenea quinquenervia = Trevoa quinquenervia
TalinumTalinaceae
Talinum caffrumAphis craccivora, gossypii
T. triangulareAphis aurantii, craccivora, gossypii

Use key to polyphagous aphids.

Tamarindus Fabaceae
Tamarindus indica Aphis aurantii, craccivora
Tamarix Tamaricaceae
Tamarix africanaBrachyunguis tamaricis; Macrosiphum euphorbiae
T. aphyllaAphis (Toxoptera) aurantii;
Brachyunguis tamaricis, tamaricophilus;
Myzus persicae
T. arboreaBrachyunguis tamaricis
T. arceuthoidesBrachyunguis brevisiphon, tamaricis, tamaricophilus;
Brevicorynella quadrimaculata
T. articulataBrachyunguis tamaricophilus
T. canariensisBrachyunguis tamaricis; Macrosiphum euphorbiae
T. chinensis see T. ramosissima
T. elongataBrachyunguis tamaricophilus;
Brevicorynella quadrimaculata
T. elongissima (=?elongata) Brachyunguis tamaricis
T. gallicaAphis craccivora, fabae; Brachyunguis tamaricis;
Brevicorynella quadrimaculata
T. gracilisBrachyunguis tamaricis, tamaricophila
T. hispidaBrevicorynella quadrimaculata
T. hohenackeri = T. smyrnensis
T. karakalensisBrachyunguis tamaricis, tamaricophilus
T. kotschyiBrachyunguis tamaricis
T. laxaAphis craccivora;
Brachyunguis brevisiphon, tamaricis;
Brevicorynella quadrimaculata
T. leptostachya Brachyunguis tamaricis
T. meyeriBrachyunguis tamaricis, tamaricophilus
T. pallasii = T. laxa
T. pentandra see T. ramosissima
T. pseudopallasiiAphis craccivora
T. ramosissimaAphis craccivora, fabae, viridissima;
(incl. chinensis, pentandra) Brachyunguis brevisiphon, tamaricis,
[tamaricivorum], tamaricophilus;
Brevicorynella quadrimaculata, sexmaculata;
Eotrama tamaricis
T. smyrnensisBrevicorynella quadrimaculata
T. tetragynaAphis craccivora
T. tetrandraAphis craccivora, solanella;
Brachyunguis tamaricis, [tamaricivorum], tamaricophilus

Key to aphids on Tamarix (apterous viviparae):-

1 ANT PT/BASE more than 1…..2
ANT PT/BASE less than 1…..4
2 SIPH and cauda black …..go to key to polyphagous aphids, starting at couplet 14
SIPH and cauda pale or dusky…..3
3 Antennal tubercles undeveloped. SIPH tapering, about 1.5 × cauda …..Aphis viridissima
Antennal tubercles well developed, their inner faces convergent in dorsal view. SIPH slightly swollen distally, about 2 × cauda…..Myzus persicae
4 BL more than 3.5 mm. HT II much elongated. SIPH pore-like, on very flat pigmented cones…..Eotrama tamaricis
BL less than 2 mm. HT II normal. SIPH not pore-like…..5
5 Eye without an ocular tubercle. SIPH slightly swollen in middle. Dorsum with 2-3 pairs of black spots…..6
Eye with normal 3-facetted ocular tubercle. SIPH tapering or cylindrical. Dorsum without dark markings…..7
6Dorsal abdomen with 3 pairs of large spino-pleural dark patches. SIPH 0.9-1.1 × cauda, which bears 48-60 hairs…..Brevicorynella sexmaculata*
Dorsal abdomen with 2 pairs of large spino-pleural dark patches. SIPH 0.75-0.9 × cauda, which bears 30-40 hairs…..Brevicorynella quadrimaculata*
7SIPH very short, only 0.038-0.05 × BL…..Brachyunguis brevisiphon*
SIPH 0.06-0.11 × BL…..8
8 Antenna 6-segmented, with ANT III much longer than ANT VI (incl. PT). Cauda triangular, 1.7-2.3 × SIPH, which are 1.0-1.3 × their basal width (fig. 113A). R IV+V 0.8-0.9 × HT II…..Brachyunguis tamaricophilus
Antenna 5- or 6-segmented, when 6-segmented ANT III is about as long as ANT VI or shorter. Cauda digitiform, 1.0-1.6 × SIPH, which are 1.3-2.2 × their basal width (fig. 113B). R IV+V 0.6-0.75 × HT II…..Brachyunguis tamaricis
TanacetumAsteraceae
Tanacetum achilleifolium [Protaphis miranda]
T. annuumBrachycaudus helichrysi; Myzus persicae
T. argenteumMacrosiphum euphorbiae
T. armenumMacrosiphoniella tanacetaria
T. artemisioidesMacrosiphoniella artemisiae
T. aureumAulacorthum solani; Myzus ascalonicus;
[Uroleucon achilleae]
T. balsamitaAphis fabae; Brachycaudus cardui, helichysi;
Macrosiphoniella artemisiae, oblonga, tanacetaria;
Macrosiphumj euphorbiae;
Myzus ascalonicus, persicae;Uroleucon tanaceti
T. barclayanumMacrosiphoniella tapuskae
T. bipinnatumMacrosiphoniella tanacetaria, tapuskae;
[Pleotrichophorus sp. aff. glandulosus]
T. borealeAphis fabae, gossypii; Brachycaudus helichrysi;
Coloradoa tanacetina;
Macrosiphoniella abrotani ssp. chosoni, confusa, atra
ssp. latysiphon, borealis, sanborni, tanacetaria,
[tanacetaria ssp. divia];
Metopeurum borystenicum, fuscoviride;
Uroleucon formosanum, tanaceti
T. canescens[Macrosiphoniella (Phalangomyzus) sp. (Iran; Starý et al. 2000)] T. cinerariifolium
Aphis fabae; Brachycaudus helichrysi; Myzus persicae;
Uroleucon gobonis
T. coccineumColoradoa rufomaculata; Metopeurum fuscoviride
T. corymbosumAphis fabae, vandergooti; Brachycaudus helichrysi;
Macrosiphoniella abrotani, miestingeri, tanacetaria,
tanacetaria ssp. italica;
Metopeurum fuscoviride; Myzus persicae;
Uroleucon minor, tanaceti
T. kittaryanum ssp. uralense Macrosiphoniella tanacetaria, tapuskae, usquertensis;
[Protaphis miranda]
T. leptophyllum Aphis craccivora
T. longifolium = Athanasia linifolia
T. macrophyllum Brachycaudus helichrysi; [Ovatomyzus boraginacearum];
Uroleucon pyrethri
T. millefoliumBrachycaudus cardui, helichrysi;
Macrosiphoniella millefolii, persequens, tanacetaria,
tapuskae;
Microsiphum pyrethri
T. multifidum = T.vulgare
T. newesskyanum Nasonovia ribisnigri
T. parthenifolium = Pyrethrum parthenifolium
T. partheniumAphis fabae, gossypii, spiraecola; Aulacorthum solani;
Brachycaudus cardui, helichrysi;
Macrosiphoniella artemisiae, oblonga, millefolii,
sanborni, [subterranea], tanacetaria;
Macrosiphum euphorbiae; Metopeurum fuscoviride;
Myzus persicae; Nasonovia ribisnigri;
[Pleotrichophorus chrysanthemi]; Uroleucon tanaceti
T. polycephalumMacrosiphoniella tanacetaria
T. praeteritum (incl. Macrosiphoniella absinthii
massicyticum)
T. pseudachilleaMacrosiphoniella abrotani, aktashica,
[kirgisica], tanacetaria, tapuskae, [Macrosiphoniella
sp. (Kadyrbekov 2003c)]
T. tanacetoides[Metopeurum matricariae]
T. turlanicum = T.barclayanum
T. uralense = T.kittaryanum ssp. uralense
T. vulgareAphis fabae, gossypii, spiraecola, [tanacenti (nomen
dubium)], vandergooti;
Aulacorthum solani; Brachycaudus cardui, helichrysi;
[Capitophorus elaeagni]; Coloradoa tanacetina;
Macrosiphoniella abrotani, aktashica, millefolii,
persequens, [pulvera], tanacetaria, tapuskae
Macrosiphum euphorbiae;
Metopeurum borystenicum, buryaticum, enslini,
fuscoviride;
Myzus ascalonicus; Pleotrichophorus glandulosus;
Trama troglodytes; Uroleucon bereticum, tanaceti
Tanacetum spp.[Brachycaudus (Thuleaphis) rumexicolens];
[Macrosiphoniella ludovicianae]

Key to apterae on Tanacetum and Pyrethrum:-

1 SIPH as very short truncate cones, only 0.4-0.5 × cauda, which is broadly triangular in dorsal view. ANT III with c.16-17 rhinaria, and IV usually with 1-2 rhinaria…..Microsiphum pyrethri*
SIPH conical, cylindrical, tapering or clavate, at least 0.6 × cauda, which is helmet-, tongue- or finger-shaped, or triangular. ANT III and IV with or without rhinaria …..2
2 SIPH with a distal zone of polygonal reticulation, occupying 0.08-0.81 of length …..3
SIPH without any polygonal reticulation…..30
3 SIPH with at least basal part pale or dusky, although often darker distally …..4
SIPH not paler at base; either wholly dark, or dark at base as well as apex with paler middle section…..10
4 SIPH 0.7-1.5 × cauda, with polygonal reticulation on distal 0.45-0.67 of length …..5
SIPH 1.5-2.9 × cauda, with polygonal reticulation on distal 0.06-0.42 of length …..7
5SIPH thicker than cauda. ANT BASE VI 0-7-1.1 × R IV+V …..Macrosiphoniella borealis*
SIPH thinner than cauda. ANT BASE VI 1.4-2.3 × R IV+V…..6
6Body oval. SIPH less than 7 × longer than their mininum width, c.0.10-0.12 × BL and 0.7-1.0 × cauda. ANT BASE VI 1.4-1.5 × R IV+V …..Macrosiphoniella abrotani (incl. ssp. chosoni)
Body spindle-shaped. SIPH more than 10 × longer than their minimum width, 0.13-0.16 × BL and 1.0-1.3 × cauda. ANT BASE VI 1.9-2.3 × R IV+V …..Macrosiphoniella oblonga
7SIPH with zone of polygonal reticulation ending in some transversely elongate cells and a small but distinct flange. Hairs on ABD TERG 3 less than 40 μm long…..Macrosiphum euphorbiae
SIPH flared at apex and completely lacking any flange, the zone of polygonal reticulation ending abruptly at apex (e.g. Fig.5i). Longest hairs on ABD TERG 3 usually more than 50 μm long…..8
8SIPH reticulated on distal 0.32-0.42 of length. Cauda with 15-30 hairs. R IV+V 0.5-0.6 × ANT BASE VI and 0.70-0.85 × HT II…..Macrosiphoniella persequens
SIPH reticulated on distal 0.06-0.25 of length. Cauda with 7-16 hairs. R IV+V 0.7-1.0 × ANT BASE VI and 0.95-1.1 × HT II…..9
9 SIPH 2.0-2.9 × cauda, slightly expanded at apices, with reticulation on subapical 0.06-0.13. Cauda with 6-8 hairs.…..Macrosiphoniella aktashica*
SIPH 1.8-2.3 × cauda, flared at apices, with reticulation on subapical 0.12-0.25. Cauda with 8-16 hairs……Macrosiphoniella tapuskae
10 Cauda tapering, triangular, less than 1.7 × longer than its basal width; if more than 1.5 × longer than basal width then dark (Fig.52a, b). ANT tubercles weakly developed, so that front of head is shallowly concave in dorsal view…..11
Cauda finger-like, parallel-sided or tapering and elongate triangular, if less than 1.7 × its basal width then pale. ANT tubercles usually well developed, so that there is a frontal sinus…..14
11 SIPH only c.0.5 × cauda…..Metopeurum enslini
SIPH 1.3-2.3 × cauda…..12
12 SIPH dusky, c. 2.2-2.3 × cauda, which is pale, triangular with blunt apex, and bears 4-6 hairs (Fig.52b)…..Metopeurum borystenicum
SIPH dark, 1.3-2.0 (-2.2) × cauda, which is dusky/dark, elongate triangular with a rather narrow apex, and bears 9-20 hairs (e.g. Fig.52a)…..13
13 Dorsal body hairs very short and blunt, those on ABD TERG III maximally c.10 μm…..Metopeurum fuscoviride
Dorsal body hairs pointed, those on ABD TERG III c.59-60 μm…..Metopeurum buryaticum*
14 SIPH reticulated on distal 0.11-0.32 of length. First tarsal segments with 5:5:5 hairs…..15
SIPH reticulated on distal 0.28-0.81 of length. First tarsal segments with 3:3:3 (or 3:3:2) hairs…..21
15 Cauda dark like the uniformly dark SIPH…..16
Cauda pale or dusky, SIPH either uniformly dark or with pale middle section …..18
16 ANT III with 15-21 rhinaria on basal 0.6 of length. SIPH 1.6-1.7 × cauda, which bears 13-24 hairs…..Uroleucon minor
ANT III with 38-86 rhinaria distributed over 0.65-0.95 of length. SIPH either 1.3-1.6 or 1.7-2.3 × cauda, which bears 11-18 hairs…..17
17 SIPH 1.7-2.3 × cauda. R IV+V with 7-9 accessory hairs …..Uroleucon gobonis (or compositae?)
SIPH 1.3-1.6 × cauda. R IV+V with 10-12 accessory hairs …..Uroleucon simile
18 ANT III 1.5-2.0 × longer than ANT IV+V together, and bearing 96-135 strongly protruberant rhinaria…..Uroleucon formosanum
ANT III less than 1.2 × longer than ANT IV+V together, with 6-32 rhinaria …..19
19 Dorsal hairs arising from small dark scleroites. SIPH dark at both ends but usually with paler middle section; 1.7-3.2 × cauda…..20
Dorsal hairs not on dark scleroites. SIPH uniformly pigmented, 1.2-1.5 × cauda…..Uroleucon bereticum
20 Conspicuous black crescent-shaped antesiphuncular sclerites present. Cauda with 16-20 hairs…..Uroleucon pyrethri*
Antesiphuncular sclerites absent. Cauda with 5-10 hairs ….. Uroleucon tanaceti
21 Dorsal hairs arising from black sclerites or scleroites. Conspicuous black crescent-shaped ante-siphuncular sclerites present…..22
Dorsal hairs not arising from sclerites or scleroites. Ante-siphuncular sclerites absent or faintly pigmented…..27
22 SIPH c.1.5-1.6 × cauda, with reticulation on distal 0.3-0.35 of length…..Macrosiphoniella miestingeri
SIPH 0.6-1.1 × cauda, with reticulation on distal 0.40-0.81 of length…..23
23 ANT III with (14-)29-55 rhinaria. Dorsal sclerites in spinal region partially fused, forming short cross-bands…..Macrosiphoniella absinthii
ANT III with 5-28 rhinaria. Dorsal hairs usually all or mostly on separate scleroites …..24
24 Cauda with 24-30 hairs…..Macrosiphoniella millefolii
Cauda with 8-20 hairs…..25
25 Tibiae with comtrastingly pale middle section. R IV+V 1.0-1.2 × HT II. SIPH with reticulation on distal 0.63-0.81. ANT III with 8-28 rhinaria …..Macrosiphoniella sanborni
Tibiae wholly dark. R IV+V 0.7-0.9 × HT II. SIPH with reticulation on distal 0.40-0.63. ANT III with 5-14 rhinaria…..26
26 SIPH 0.13-0.17 × BL. HT I with 3 hairs …..Macrosiphoniella atra (ssp. latysiphon)
SIPH 0.08-0.10 × BL. HT I with 2 hairs…..Macrosiphoniella caucasica
27 SIPH 0.90 –1.45 × cauda and flask-shaped; constricted at base, strongly swollen on basal half, narrowing on reticulated distal section to less than half the maximum width of the swollen part, and flared at apex (Fig.13h) …..Macrosiphoniella antennata
SIPH tapering from base to apex, 0.6-1.3 × cauda…..28
28 SIPH longer than (1.12-1.31 ×) cauda, and reticulated on distal 0.28-0.40 of length. Tibiae with pale middle sections. Dorsal hairs stout, capitate, with papillate bases…..Macrosiphoniella confusa
SIPH shorter than (0.6-0.9 ×) cauda, reticulated on distal 0.41-0.69 of length. Tibiae entirely dark. Dorsal hairs not arising from papillate bases…..29
29 ANT III usually entirely black, with 12-32 rhinaria. SIPH reticulated on distal 0.41-0.52 of length. R IV+V 0.7-0.85 × HT II and 0.55-0.75 × ANT BASE VI…..Macrosiphoniella tanacetaria
ANT III paler at base, and bearing 3-14 rhinaria. SIPH reticulated on distal 0.45-0.69 of length. R IV+V 0.85-1.05 × HT II and 0.67-1.0 × ANT BASE VI…..Macrosiphoniella artemisiae
30 Triommatidium merged with compound eye, so that there is no distinct ocular tubercle. Dorsal hairs small, fan- or club-shaped, or at least with somewhat expanded apices. Front of head weakly convex in dorsal view, ANT tubercles undeveloped. ANT PT/BASE 1.4-2.0. SIPH cylindrical for most of length, slightly swollen subapically (e.g. Fig.52e). R IV+V with slightly concave sides. Cauda less than 1.5× its basal width, with 4-5 hairs…..31
Triommatidum forming a distinct ocular tubercle at posterior margin of eye. Dorsal hairs with blunt or pointed apices, or if with expanded apices then long, with rod-shaped stems. Other characters not in above combination…..32
31 Dorsal hairs fan-shaped (Fig.52c). RIV+V more than 1.1 × HT II. SIPH 0.17-0.2 × BL, with basal part almost smooth (Fig.12o)…..Coloradoa rufomaculata
Dorsal hairs very small and weakly club-shaped, or with only slightly expanded apices (Fig.52d). R IV+V less than 1.1 × HT II. SIPH 0.13-0.18 × BL, with basal part coarsely imbricated like distal part (Fig.52e)…..Coloradoa tanacetina
32 Hairs on ABD TERG 1-5 numerous, long, and all or mostly with distinct, more-or-less cylindrical rod-like stems, broadening distally into fan-shaped or capitate apices. R IV+V stiletto-shaped with a pair of very long accessory hairs near base..…Pleotrichophorus glandulosus
Hairs on ABD TERG 1-5 without fan-shaped or distinctly capitate apices. R IV+V not stiletto-shaped and without any very long accessory hairs…..33
33ANT PT/BASE 8-11. ANT III with 7-28 rhinaria extending over 0.4-0.7 of length. Spiracular apertures on pro-and metathorax much larger than those on abdomen…..Nasonovia ribisnigri
ANT PT/BASE 1.7-6.0. ANT III with 0-3 rhinaria near base. Thoracic spiracular apertures reniform, similar in size and form to abdominal ones…..34
34 Large transparent domed marginal tubercles (MTu) present at least on ABD TERG 1-4 and 7 (Fig.5j). ANT PT/BASE 4.1-6.0…..Aphis vandergooti
MTu absent, or only consistently present on ABD TERG 1 and 7; if the latter then ANT PT/BASE 1.8-3.7…..35
35 Cauda helmet-shaped, not longer than its basal width in dorsal view. SIPH with a distinct subapical annular incision. Spiracular apertures large and rounded…..36
Cauda tongue- or finger-shaped, much longer than its basal width. SIPH without a subapical annular incision. Spiracular apertures reniform…..go to key to polyphagous aphids
36 Dorsal abdomen with an extensive solid black shield. ANT III 0.31-0.47 mm, 2.4-3.4 × HT II. R IV+V 0.17-0.24 mm. SIPH dark, imbricated, 1.7-3.4 × cauda ……Brachycaudus cardui
Dorsal abdomen without a black shield. ANT III 0.07-0.25 mm, 0.9-2.2 × HT II. R IV+V 0.10-0.15 mm. SIPH pale, smooth, 0.8-2.0 × cauda ……Brachycaudus helichrysi
TapinanthusLoranthaceae
Tapinanthus cordifolius Tuberaphis loranthi
Tapinanthus sp.Sitobion ?asirum

Use key to apterae on Loranthus.

TaraxacumAsteraceae

[Note: two Aphis species, described by Börner (1940) and Nevsky (1951), are confused under the name A. taraxacicola; we have not attempted to allocate specific hosts to either species.]

Taraxacum albidum Aphis taraxacicola
T. altaicumAphis taraxacicola
T. arctogenum = T. ceratophorum
T. ceratophorumAphis madderae; Metopolophium arctogenicolens
T. dens-leonisAphis gossypii, [intybi]; Uroleucon taraxaci
T. ecornutum[Pemphigus vesicarius]; Smynthurodes betae
T. erythrospermum Aphis taraxacicola ; Aulacorthum solani;
Myzus ascalonicus; [Uroleucon sp. (Leonard 1968: 358)]
T. hibernicumAphis nevskyana
T. kok-saghyzAphis nevskyana; Protaphis scorzonerae;
[Titanosiphon koksaghyz Nevsky 1937];
Uroleucon taraxaci
T. lacerum = T. ceratophorum
T. laevigatum = T. erythrospermum
T. majusHyperomyzus pallidus
T. mongolicumAphis taraxacicola; Uroleucon gobonis
T. monochlamydeum Aphis craccivora, taraxacicola; [Pemphigus vesicarius];
Protaphis betpakdalensis, scorzonerae
T. montanum [Pemphigus immunis]
T. officinale[Anuraphis farfarae];
Aphis craccivora, eugenyi, fabae, gossypii, nevskyana, spiraecola, taraxacicola, [vandergooti];
Aulacorthum solani;
Brachycaudus cardui, helichrysi, lateralis;
[Cavariella salicicola];
Dysaphis microsiphon, [radicola], taraxaci;
[Geoica lucifuga];
Hyperomyzus carduellinus, lactucae, pallidus;
Macrosiphum euphorbiae, [valerianae];
Myzus ascalonicus, cymbalariae, ornatus, persicae;
[Nasonovia (Kakimia) sp. (Leonard 1968)];
Neomyzus circumflexus; Pemphigus bursarius;
Prociphilus erigeronensis;
Protaphis knowltoni, middletonii, scorzonerae, [terricola];
Protrama taraxaci;
Trama caudata, rara, taraxaci, troglodytes;
Uroleucon ambrosiae, cichorii, compositae, grossum,
[macolai], [nigrotuberculata], pseudambrosiae, sonchi,
taraxaci
T. platycarpumAphis gossypii, taraxacicola; Aulacorthum solani;
Hyperomyzus carduellinus; Myzus persicae;
Trama taraxaci; Uroleucon formosanum
T. serotinumAphis gossypii, taraxacicola; Protaphis scorzonerae;
Trama rara; Uroleucon taraxaci
T. syriacumAphis taraxacicola; Protrama radicis; Trama caudata
T. tadshicorumAphis taraxacicola; Rectinasus buxtoni; Trama troglodytes
T. tianschanicumAphis taraxacicola
T. vulgareUroleucon taraxaci
Taraxacum spp.[Acyrthosiphon pisum]; [Anoecia corni];
Aulacorthum palustre, [rufum];
[Dysaphis ranunculi]; Nasonovia ribisnigri;
Uroleucon [erigeronense], hypochoeridis, [tussilaginis]

Key to apterae on Taraxacum:-

1 HT II greatly elongated, more than 0.5 × hind tibia…..2
HT II of normal length…..6
2 SIPH absent…..3
SIPH present as raised pores…..4
3 HT II 0.84-0.92 × length of hind tibia. Eyes with many facets …..Trama rara
HT II 0.60-0.82 × length of hind tibia. Eyes with only 3 facets …..Trama troglodytes
4 ANT III with c.15 rhinaria. HT II less than 0.7 × hind tibia …..Protrama taraxaci*
ANT III with 0-1 rhinaria. HT II more than 0.7 × hind tibia…..5
5 All apterae alatiform, with dark dorsal sclerites and pigmented SIPH cones ANT VI longer than V, with ANT PT/BASE more than 0.5…..Protrama radicis
Apterae without dark dorsal sclerotisation. ANT VI shorter than V, with ANT PT/BASE less than 0.4…..Trama caudata (or Trama taraxaci*? – see text)
6 ANT PT/BASE less than 0.5. Eyes of 3 facets. SIPH absent…..7
ANT PT/BASE more than 0.7. Eyes mulifacetted. SIPH present, tubular or conical …..8
7 ANT 5-segmented, with ANT V BASE very long, more than 15 × longer than the short peg-like PT. R IV+V extremely long, similar in length to hind femur…..Rectinasus buxtoni
ANT 5- or 6-segmented, base of last segment and R IV+V relatively much shorter …..use couplets 2 and 3 of key to polyphagous aphids
8 SIPH dark with an extensive distal zone of reticulation comprising numerous small polygonal cells…..9
SIPH if dark then without polygonal reticulation…..16
9 ANT III 1.5-2.0 × longer than ANT IV+V together, and bearing 96-135 strongly protruberant rhinaria…..Uroleucon formosanum
ANT III less than 1.2 × longer than ANT IV+V together, with 6-86 rhinaria …..10
10 Dorsal abdominal hairs not placed on dusky or dark scleroites …..Uroleucon sonchi
Dorsal abdominal hairs all or mostly placed on small dusky or dark scleroites …..11
11 Crescent-shaped ante-siphuncular sclerites present…..12
Ante-siphuncular sclerites absent or vestigeal…..13
12 R IV+V 0.84-1.08 × HT II (rarely more than 1). Cauda with 14-24 hairs (usually about 17)…..Uroleucon hypochoeridis
R IV+V 1.04-1.35 × HT II. Cauda with 18-33 hairs…..Uroleucon cichorii group (incl. grossum)
13 Post-siphuncular sclerites absent or small, not much larger than scleroites at other hair bases, which are large, black and numerous, and sometimes merged together. ANT and tibiae entirely black. Cauda as black as SIPH and rather short and thick, with 8-12 hairs…..Uroleucon taraxaci
Large dark post-siphuncular sclerites present. Scleroites at bases of dorsal hairs smaller and less numerous, never merged, usually paler than SIPH. ANT III usually pale at base, and tibiae with paler middle sections. Cauda pale or dark, if dark then long and bearing 13-20 hairs…..14
14 Coxae and cauda dusky/dark. ANT III with 33-86 rhinaria on 0.7-0.95 of length…..Uroleucon compositae (or gobonis?)
Coxae and cauda pale. ANT III with 8-39 rhinaria on 0.4-0.7 of length …..15
15 HT II rather long and thin, 6 or more × longer than its maximum thickness and 0.9-1.1 × R IV+V…..Uroleucon pseudambrosiae
HT II less than 5 × its maximum thickness and 0.70-0.85 × R IV+V…..Uroleucon ambrosiae
16 Well-developed marginal tubercles (MTu) consistently present on ABD TERG 2-4, as well as on several other segments…..17
MTu only sporadically present, and then small, on ABD TERG 2-4, although they may be well developed on other segments…..20
17 Cauda finger-like or elongate triangular, with 5-14 hairs. Head without STu …..18
Cauda helmet-shaped, not longer than its basal width in dorsal view, with 4-5(-6) hairs. Head with a pair of spinal tubercles (STu)…..19
18 SIPH and cauda pale. SIPH 0.10-0.13 × BL…..Aphis nevskyana*
SIPH and cauda dark. SIPH at least 0.13-0.19 × BL…..Aphis taraxacicola
19 SIPH very short, only 0.03-0.08 mm long, 0.4-0.8 (-1.2) × cauda …..Dysaphis microsiphon
SIPH c. 0.11 mm long, c.2 × cauda…..Dysaphis taraxaci*
20 Spiracular apertures large and rounded. Cauda short, rounded, helmet-shaped, a little shorter than its basal width, with a slight basal constriction…..21
Spiracular apertures reniform. Cauda tongue- or finger-shaped, or if short then bluntly triangular and without any basal constriction…..23
21 Dorsum without any dark markings. SIPH smooth, 0.05-0.10 × BL…..Brachycaudus helichrysi
Dorsum with a dark shield or extensive dark markings. SIPH imbricated, 0.09-0.15 × BL…..22
22 Longest hairs on hind femur 10-25 mm…..Brachycaudus lateralis
Longest hairs on hind femur more than 25 mm long …..Brachycaudus cardui
23 R IV+V as long as or longer than cauda, which is dark and bluntly triangular …..24
R IV+V shorter than cauda, which is tongue- or finger-shaped…..27
24 ANT PT/BASE 1.5-2.4…..25
ANT PT/BASE 0.9-1.3…..26
25 Hairs on ANT III all shorter than BD III. SIPH usually longer than cauda…..Protaphis middletonii
Longest hairs on ANT III 1.0-1.5 × BD III. SIPH usually shorter than cauda…..Protaphis knowltoni
26 ANT III usually with 1-5 rhinaria on distal part. Hairs on front of head 1.7-2.0 × ANT BD III. ABD TERG 6 (as well as 1 and 7) consistently with MTu …..Protaphis betpakdalensis*
ANT III without rhinaria. Hairs on front of head c.0.6 × ANT BD III. ABD TERG 6 without MTu….. Protaphis scorzonerae
27 ANT tubercles well developed and head smooth, or with spicules on ventral surface only…..28
Either ANT tubercles undeveloped/ weakly developed and ABD TERG 1 and 7 with MTu, or head densely spiculose both dorsally and ventrally…..34
28 SIPH clavate…..29
SIPH tapering or cylindrical on distal half…..31
29 Hairs on ABD TERG 8 are 8-19 μm long, and on ANT tubercles 6-11 μm. Secondary rhinaria distributed ANT III 11-29, IV (0)-1-16, V 0 (-9). ANT PT/BASE 4.3-5.6. ANT PT 1.6-2.3 × cauda…..Hyperomyzus carduellinus
Hairs on ABD TERG 8 are 30-50 μm long, and on ANT tubercles 18-30 μm. Secondary rhinaria distributed ANT III 4-40, IV 0-2, V 0. ANT PT/BASE 4.8-7.9. ANT PT 2.0-3.0 × cauda…..30
30 SIPH 3-5 × longer than maximum width of swollen part, which is 1.6-2.4 × minimum width on basal part. R IV+V 0.9-1.12 × HT II (mostly 0.95-1.1 ×). (Al. with a compact black solid trapezoid dorsal abdominal patch, with hardly any perforations)…..Hyperomyzus pallidus
SIPH 4-7 × longer than maximum width of swollen part, which is 1.3-2.0 × minimum width on basal part. R IV+V 0.8-1.07 × HT II (mostly 0.9-1.0). (Al. with a very irregular and variably shaped dorsal abdominal patch, interrupted by extensive perforations)…..Hyperomyzus lactucae
31 Thoracic spiracles enlarged, much larger than abdominal spiracles. ANT PT/BASE 7.0-11.4, mostly more than 8.0. ANT III with 7-28 rhinaria extending over 0.4-0.7 of length. Dorsum usually with paired dark intersegmental markings…..Nasonovia ribisnigri
Thoracic spiracles similar in size to abdominal ones. ANT PT/BASE less than 7. ANT III with 1-8 (-10) rhinaria on basal part. Dorsum without any dark markings …..32
32 SIPH with at least 4 rows of polygonal reticulation. Longest hairs on ANT III 0.6-1.0 × BD III…..Macrosiphum euphorbiae
SIPH without polygonal reticulation, or with only 1-3 indistinct rows of transversely elongate cells. Longest hairs on ANT III 0.2-0.5 × BD III…..33
33 (Based on ovip.) ANT III with at least 3-8 rhinaria. R IV+V c.0.7 × HT II. Head with median frontal tubercle well developed, and without spicules…..Metopolophium arctogenicolens*
ANT III with 1-3 rhinaria. R IV+V 1.2-1.3 × HT II. Head with median frontal tubercle weakly developed, and with some small spicules ventrally …..Aulacorthum palustre
34 ANT tubercles undeveloped, ANT PT/BASE c.1.7-1.8, SIPH cylindrical, only c. 2 × longer than wide, about as long as cauda which bears only 4 hairs …..Aphis madderae*
Without that combination of characters…..go to key to polyphagous aphids, starting at couplet 4
TarennaRubiaceae
Tarenna sp.Aphis gossypii
TauscheriaBrassicaceae
Tauscheria lasiocarpa Aphis craccivora
TaxillusLoranthaceae
Taxillus sutchuenensis Tuberaphis loranthicola (= takenouchii?)

Use key to apterae on Loranthus.

Taxodium Taxodiaceae
Taxodium distichum Illinoia morrisoni;
Grylloprociphilus imbricator (on roots)
Taxus Yews Taxaceae
Taxus baccataCinara (Cupressobium) himalayaensis; Prociphilus taxus
T. cuspidataElatobium momii
1 SIPH absent. R IV+V 7.0-8.0 × ANT PT…..Prociphilus taxus
SIPH present as tubes or dark hairy cones. R IV+V less than 4.5 × ANT PT …..2
2 SIPH tubular. R IV+V 0.2-0.4 × ANT PT…..Elatobium momii
SIPH as dark hairy cones. R IV+V 4.2-4.5 × ANT PT …..Cinara himalayaensis
Teclea Rutaceae
Teclea sp.Aphis (Toxoptera) citricidus
Tecoma Bignoniaceae
Tecoma australis = Pandorea pandorana
T. capensisAphis gossypii; Aulacorthum solani; Myzus persicae
T. castanifoliaAphis gossypii, spiraecola
T. grandiflora = Campsis grandiflora
T. nyassaeMyzus persicae
T. radicans = Campsis radicans
T. shirensis = T. nyassae
T. smithiiAphis craccivora, fabae, gossypii
T. stansAphis aurantii, fabae, gossypii, spiraecola;
Macrosiphum euphorbiae; Myzus ornatus, persicae

Use key to polyphagous aphids.

TectariaDryopteridaceae
Tectaria sp.Macrosiphum miho

Use key to apterae on ferns under Polypodium.

Tectona Verbenaceae
Tectona grandisAphis gossypii; Myzus persicae

Use key to polyphagous aphids.

TeesdaliaBrassicaceae
Teesdalia nudicaulis Myzus persicae
TelekiaAsteraceae
Telekia speciosaAphis fabae; Brachycaudus helichrysi;
Capitophorus pakansus; Uroleucon telekiae
Telekia sp.Myzus persicae

Key to apterae on Telekia:-

1 ANT III with 2-5 long capitate hairs. Dorsal body hairs numerous long and capitate, arising from large tubercles, the longest hairs being 3-4 × ANT BD III (Fig.34b). R IV+V 2.2-2.5 × HT II…..Capitophorus pakansus
ANT and dorsal body hairs not long and capitate, without tuberculate bases. R IV+V less than 2 × HT II…..2
2 SIPH long, cylindrical, black, with polygonal reticulation on distal 0.17-0.25, 2.0-2.4 × cauda which is long and finger-like and bears 20-26 hairs. (Additional diagnostic characters for this species: dorsal hairs all arising from dark scleroites; R IV+V 1.5-1.8 × HT II; first tarsal segments with 3 hairs)…..Uroleucon telekiae
SIPH short, conical pale, without polygonal reticulation, 0-8-2.0 × cauda which is helmet-shaped and bears 4-6 hairs…..Brachycaudus helichrysi

(or otherwise go to key to polyphagous aphids)

Teline see GenistaFabaceae
Teline linifolia = Genista linifolia
TellimaSaxifragaceae
Tellima grandiflora Aulacorthum solani; Macrosiphum tolmiea;
Nasonovia stroyani; Neomyzus circumflexus

Key to apterae on Tellima:-

1 ANT III with 18-33 rhinaria along most of length, and IV with 0-8. Abdominal spiracular apertures almost completely covered by cowl-like opercula. R IV+V 1.6-2.2 × HT II…..Nasonovia stroyani
ANT III with 0-10 rhinaria on basal part, IV with 0. Abdominal spiracular apertures not or only partly covered by opercula. R IV+V less than 1.6X HT II…..2
2 SIPH with subapical polygonal reticulation. R IV+V 1.3-1.5 × HT II, with 12-16 accessory hairs. ANT III usually without rhinaria…..Macrosiphum tolmiea
Without that combination of characters…..go to key to polyphagous aphids
TelosmaAsclepiadaceae
Telosma cordatum Myzus persicae
TephroserisAsteraceae
Tephroseris cladobotrys Aphis fabae; Brachycaudus cardui
T. crispaBrachycaudus cardui; Myzus ornatus
T. integrifolia = Senecio integrifolius
T. praticolaAphis fabae, jacobaeae; Uroleucon bicolor

Use key to apterae under Senecio.

TephrosiaFabaceae
Tephrosia barbigera = T. nana
T. bracteolataAphis gossypii
T. candidaAphis craccivora, gossypii
T. cinereaAphis craccivora
T. floridaMicroparsus tephrosiae
T. glomeruliflora Aphis craccivora
T. hookerianaAphis craccivora
T. nanaAphis craccivora
T. purpureaAphis craccivora; Megoura dooarsis
T. reptansAphis craccivora
T. sennaAphis craccivora
T. spicataMicroparsus tephrosiae
T. totta = Cracca totta
T. virginianaMicroparsus tephrosiae
T. vogeliiAphis craccivora, glycines, gossypii; Myzus persicae
Tephrosia spp.Brachycaudus helichrysi; [Longicaudus himalayensis];
Sitobion africanum

Key to apterae on Tephrosia:-

1 SIPH black, with a subapical zone of polygonal reticulation. Dorsum with variably developed segmental dark bars or paired patches…..Sitobion africanum
SIPH pale or dark, without polygonal reticulation. Dorsum either unsclerotised or with a solid dark sclerotic shield…..2
2 ANT tubercles very well developed, with smooth divergent inner faces. ANT longer than BL, with PT/BASE more than 5. SIPH swollen in middle…..3
ANT tubercles undeveloped or weakly developed. ANT shorter than BL, with PT/BASE less than 4. SIPH conical, tapering or cylindrical…..4
3 SIPH 1.0-1.1 × cauda. R IV+V 1.0-1.1 × HT II…..Microparsus tephrosiae
SIPH 1.3-1.6 × cauda. R IV+V 0.70-0.85 × HT II…..Megoura dooarsis
4 Dorsal abdomen with an extensive solid black shield. Cauda black ..…Aphis craccivora
Dorsal abdomen without dark markings. Cauda pale/dusky, paler than SIPH ..…5
5 Cauda 0.08-0.135 × BL (only more than 0.12 × BL in very small specimens with BL less than 1 mm), and 0.8-1.25 × ANT V; pale to dusky, without a constriction, less than 3 × longer than its width at midlength, and bearing 4-7 (usually 5-6) hairs …..Aphis gossypii
Cauda 0.12-0.175 × BL, and 1.05-1.7 × ANT V; very pale, usually with a slight mid-way constriction, more than 3 × longer than its narrowest width at midlength, and bearing 5-10 (usually 7-9) hairs..…Aphis glycines
Terminalia Combretaceae
Terminalia arjuna Aphis gossypii; Paoliella nirmalae
T. australisLizerius brasiliensis
T. brachystemmaAphis gossypii; Paoliella harteni, terminaliae
T. brasiliensisLizerius jorgei
T. chebula“gall of unknown aphid” – Mani 1973:143
T. mantalyAphis gossypii
T. sericeaPaoliella harteni, terminaliae
T. tomentosa[Myzus terminalae (nomen nudum)]

Key to aphids on Terminalia:-

1 Cauda not knobbed…..Aphis gossypii (or try key to polyphagous aphids)
Cauda knobbed (i.e., distinctly constricted on basal part)…..2
2 Knob of cauda very elongate, much longer than its maximal width, tapering to apex (e.g. fig. 114A)…..3
Knob of cauda about as long as its maximal width, with rounded apex…..4
3 Mesonotum and ABD TERG 4 of aptera each with a pair of very long, curved spinal processes (0-4-0.7 mm long) …..Lizerius jorgei*
Spinal processes in aptera only present on ABD TERG 8 …..Lizerius brasiliensis
4 Adult viviparae apterous as well as alate. Alata with long and tapering or finger-like spinal processes (fig. 114B), like those of aptera, as well as wart-like processes. Pronotum with 1 pair of anterio-lateral hairs…..Paoliella nirmalae
Adult viviparae all alate. Spinal processes if present all short and wart-like. Pronotum with 2 pairs of anterio-lateral hairs…..5
5 Alata with paired, short, spinal hair-bearing processes on ABD TERG 1-8 (fig. 114B), and similar marginal processes on ABD TERG 1-4. R IV+V less than 0.75× HT II…..Paoliella harteni
Alata without abdominal processes. R IV+V more than 0.8× HT II …..Paoliella terminaliae
TernstroemiaPentaphylacaceae
Ternstroemia gymnanthera Neoaulacorthum magnoliae
T. peduncularis = T. tepezapote
T. tepezapoteAphis (Toxoptera) aurantii

Use key to polyphagous aphids.

TessariaAsteraceae
Tessaria absinthoides see Pluchea absinthoides
TetraceraDilleniaceae
Tetracera indicaAphis (Toxoptera) aurantii
T. volubilisAphis gossypii

Use key to polyphagous aphids.

TetraclinisCupressaceae
Tetraclinis articulata Cinara cupressi
Tetradenia (including Iboza) Lamiaceae
Tetradenia multiflora [Sitobion sp.]
T. ripariaEucarazzia elegans; Macrosiphum salviae; Sitobion colei
Tetradenia sp.[Metanipponaphis cuspidatae]

Key to apterae on Tetradenia:-

1SIPH strongly swollen, with maximum diameter of swollen part more than 2 × minimum diameter of stem, smooth except for a little subapical polygonal reticulation (Fig.48a). SIPH 5.4-8.2 × cauda…..Eucarazzia elegans
SIPH not swollen or much less swollen, and less than 3.5 × cauda…..2
2 SIPH dark with subapical polygonal reticulation. Dorsum usually with a solid dark shield across ABD TERG 1-5…..3
SIPH if dark then without polygonal reticulation. Dorsum with or without dark sclerotisation…..go to key to polyphagous aphids
3 Longest hairs on ANT III 8-20 μm, 0.2-0.6 × BD III…..Sitobion colei
Longest hairs on ANT III 22-36 μm, 0.6-1.2 × BD III …..Macrosiphum salviae
TetradymiaAsteraceae
Tetradymia canescens Pleotrichophorus tetradymiae;
Protaphis tetradymia; Uroleucon erigeronense
Tetradymia sp.[Aphis craccivora]

Key to apterae on Tetradymia:-

1 SIPH dark distally, with pale basal section, and polygonal reticulation on 0.21-0.45 of length. ANT III with 5-37 rhinaria. Cauda tapering to a very thin apex, with subapical hairs usually shorter and often blunter than lateral hairs …..Uroleucon erigeronense
SIPH wholly dark, without distal polygonal reticulation. ANT III without rhinaria. Cauda finger-like or triangular, without shorter blunter subapical hairs…..2
2 Dorsal hairs numerous, with knobbed apices, and arising from tuberculate bases. R IV+V stiletto-shaped, with concave sides. ANT PT/BASE 2.5-3.4. Marginal tubercles (MTu) absent. Cauda pale, finger-like, with 5 hairs …..Pleotrichophorus tetradymiae
Dorsal hairs pointed, without tuberculate bases. R IV+V not concave-sided. ANT PT/BASE 1.1-2.0. Very large MTu present on ABD TERG 1 and 7. Cauda dark, triangular, not longer than its basal width, with 8-14 hairs…..Protaphis tetradymia
Tetragonocalamus see Chimonobambusa Poaceae
Tetragonolobus see LotusFabaceae
Tetragonolobus maritimus = Lotus maritimus
T. requienii = Lotus conjugatus ssp. requienii
TetramolopiumAsteraceae
Tetramolopium tenerrimum Macrosiphoniella asteris
TetrapanaxAraliaceae
Tetrapanax papyrifer [Aphis sp. (Leonard 1972a:104)];
Cavariella araliae, nigrocaudata

Couplet for separating these two species:-

(Note: both spp. have ABD TERG 8 with a backwardly-directed process above the cauda)

Supracaudal process much longer than cauda. SIPH, cauda and genital plate unpigmented…..Cavariella araliae
Supracaudal process about as long as cauda. Distal part of SIPH, cauda and genital plate blackish…..Cavariella nigrocaudata
TeucriumLamiaceae
Teucrium botrysAphis teucrii
T. canadenseAphis teucrii; Macrosiphum euphorbiae;
Myzus persicae
T. capitatumAphis teucrii, [Aphis sp. (Spain: Seco Fernández et al. 1999)]
T. chamaedrys (incl. ssp. pinnatifidum) Aphis alienus, teucriii; Aulacorthum solani;
Myzus ornatus; Ovatomyzus chamaedrys
T. divaricatumAphis teucrii; Ovatomyzus chamaedrys
T. flavumAphis [origani], teucrii, [Aphis sp. (Cocuzza et al. 2014)]
T. fruticansAphis teucrii
T. inflatum = T, vesicarium
T. laciniatumProtaphis middletonii
T. marumAphis teucrii
T. montanumAphis alienus, teucrii
T. orientaleAphis gossypii
T. poliumAphis polii, [salviae], teucrii
T. pseudochamaepitys Aphis frangulae
T. scorodoniaAphis alienus, [“scorodoniae del Guercio” (see text under
alienus], teucrii, [Aphis sp. (Cocuzza et al. 2014)];
Myzus ornatus; Ovatomyzus chamaedrys
T. vesicariumAphis gossypii
Teucrium spp.Aphis fabae, [teucrii Lichtenstein (nomen nudum)]

Key to apterae on Teucrium:-

1 Head smooth with ANT tubercles developed, their inner faces steep-sided. ANT III without rhinaria. SIPH pale, without polygonal reticulation, slightly swollen distally. Cauda pale, constricted at base, and bearing 5(-7) hairs…..Ovatomyzus chamaedrys
Without that combination of characters…..2
2 ANT tubercles weakly developed.. ABD TERG 1 and 7 with marginal tubercles (MTu)…..3
ANT tubercles well developed. ABD TERG 1 and 7 without MTu…..go to key to polyphagous aphids
3 Cauda black with more than 10 hairs. ABD TERG 7 and 8 with dark cross-bands, and usually there are also dark dorsal markings anterior to SIPH…..4
Cauda pale, dusky or dark, with 4-10 hairs. ABD TERG 7 and 8 usually without cross-bands, or with a narrow band on 8 only, and no dark markings anterior to SIPH …..5
4 Cauda tongue-shaped, much longer than its basal width. ANT III without rhinaria. ANT PT/BASE 2.1-3.8 (mostly 2.4-3.6)……Aphis fabae
Cauda short, bluntly triangular, not longer than its basal width. ANT III often with a few rhinaria on distal part. ANT PT/BASE 1.4-2.1…..Protaphis middletonii
5 R IV+V 0.85-1.22 × ANT BASE VI, 1.10-1.45 × HT II and 0.61-1.0 × cauda, which is distinctly paler than SIPH…..Aphis gossypii (or frangulae)
R IV+V 1.14-2.25 × ANT BASE VI, 1.18-2.12 × HT II and 0.69-1.40 × cauda, which is not distinctly paler than SIPH…..6
6 R IV+V 1.49-2.25 × HT II (97% of specimens >1.6), and 1.28-2.35 × ANT BASE VI…..Aphis polii
R IV+V 1.18-1.63 × HT II (97% of specimens <1.6), and 1.14-1.79 × ANT BASE VI …..7
7 At least some of ABD TERG 2-5 with marginal tubercles (MTu). SIPH more than 5.5 × longer than their minimal distal width just proximal to flange …..Aphis alienus
MTu rarely present on any of ABD TERG 2-5. SIPH less than 5.4 × longer than their minimal distal width just proximal to flange…..Aphis teucrii
ThaliaMarantaceae
Thalia geniculataAphis gossypii; Hysteroneura setariae;
Sitobion miscanthi, [Sitobion sp. (Remaudière &
Autrique 1985)]

Key to apterae on Thalia:-

(Note: all species have uniformly dark SIPH and a pale or dusky cauda)

1 SIPH with a subapical zone of polygonal reticulation…..Sitobion sp(p).
SIPH without polygonal reticulation…..2
2 Cauda long and pale, with 4 hairs, contrasting with black calf-shaped SIPH (slightly swollen on basal part), and dark coxae and femora …..Hysteroneura setariae
Cauda pale or dusky with 4-8 hairs, SIPH dark and tapering, coxae and femora pale…..Aphis gossypii
ThalictrumRanunculaceae
Thalictrum adianthifolium see Th. minus
Th. amurenseLongicaudus trirhodus
Th. angustifolium see Th. lucidum
Th. aquilegiifolium (incl. vars cornuti, sibiricum) Aphis neothalictri, thalictri; Longicaudus trirhodus;
Thalictrophorus thalictrophilus
Th. buschianumLongicaudus trirhodus
Th. chelidoniiLongicaudus dunlopi
Th. collinumAphis thalictri; Longicaudus trirhodus;
Nasonovia saurotarbagataica
Th. contortum = Th. aquifolium var. sibiricum
Th. coriaceumNasonovia purpurascens
Th. cornuti = Th. aquifolium var. cornuti
Th. delavayiAphis thalictri; Longicaudus trirhodus
Th. dioicumAcyrthosiphon ranunculum; Nasonovia purpurascens
Th. dipterocarpum = Th. delavayi
Th. elatum = Th. minus
Th. fendleriIllinoia thalictri
Th. flavumAphis thalictri; Aulacorthum solani;
Longicaudus dunlopi, trirhodus
Th. foetidumAphis thalictri; Longicaudus trirhodus;
Pemphigus matsumurai
Th. glaucum = Th. speciosissimum
Th. hypoleucum = Th. minus var. hypoleucum
Th. isopyroidesLongicaudus trirhodus
Th. kemense = Th. minus ssp. kemense
Th. lucidumAphis thalictri; Longicaudus trirhodus
Th. majus (= Th. minus?) Longicaudus trirhodus ssp. iranicus
Th. minus (incl. vars Aphis gossypii, neothalictri, spiraecola, thalictri;
adianthifolium, hypoleucum) [Chaetosiphon alpestre]; Longicaudus trirhodus;
Myzus persicae; Nasonovia altaensis, saurotarbagataica
Th. minus ssp. kemense Aphis neothalictri, thalictri; Longicaudus trirhodu
Th. minus ssp. pseudominus Aphis thalictri; Longicaudus trirhodus
Th. pauciflorum = Th. dioicum
Th. petaloideumAphis thalictri
Th. polygamum = Th. pubescens
Th. pseudominus = Th. minus ssp. pseudominus
Th. pubescens Nasonovia purpurascens
Th. purpurascensNasonovia purpurascens
Th. rariflorumNasonovia altaensis
Th. revolutumAphis fabae; Nasonovia purpurascens
Th. rochebrunnianum Longicaudus trirhodus
Th. rhynchocarpum Aulacorthum solani; Sitobion thalictri
Th. simplexAphis hasanica, neothalictri, thalictri;
Longicaudus trirhodus; Nasonovia saurotarbagataica
Th. simplex ssp. boreale = Th. rariflorum
Th. sparsiflorumLongicaudus trirhodus
Th. speciosissimum Aphis thalictri; Longicaudus trirhodus
Th. squarrosumLongicaudus trirhodus
Th. thunbergii = Th. minus var. hypoleucum
Thalictrum spp.[Aphis thalictri ssp. orangii];
Longicaudus cornutus, himalayensis, kumauni;
Macrosiphum euphorbiae

Key to apterae on Thalictrum:-

1 ANT PT/BASE less than 0.5. SIPH absent…..Pemphigus matsumurai
ANT PT/BASE more than 0.5. SIPH present…..2
2 SIPH shorter than cauda…..3
SIPH longer than cauda…..12
3 SIPH very short, less than 0.5 × cauda…..4
SIPH 0.6-0.9 × cauda…..7
4 ANT III much shorter than ANT IV+V together. First tarsal segments with (2-) 3 hairs. Cauda broadly triangular, not or hardly longer than its basal width in dorsal view, with 9-12 hairs…..Aphis thalictri (s. str.)
ANT III much longer than IV+V together. First tarsal segments with 5 or 6 hairs. Cauda finger-like, much longer than its basal width, with 8-19 hairs…..5
5 ANT PT/BASE 2.6-3.5. Dorsal cuticle corrugated and papillate. Cauda with 8-12 hairs…..Longicaudus cornutus*
ANT PT/BASE 0.91-2.08. Dorsal cuticle smooth. Cauda with 13-19 hairs …..6
6 ANT PT/BASE 0.91-1.46…..Longicaudus trirhodus
ANT PT/BASE 1.56-2.08…..Longicaudus dunlopi
7 ANT III much longer than IV+V together. First tarsal segments with 5-6 hairs …..8
ANT III much shorter than ANT IV+V together. First tarsal segments with 2-3 hairs …..9
8 ANT PT/BASE less than 2. First tarsal segments with 6 hairs…..Longicaudus himalayanesis*
ANT PT/BASE 2.5-3.2. First tarsal segments with 5 hairs …..Longicaudus kumauni*
9 ANT III with 3-12 rhinaria on basal half. Marginal tubercles (MTu) absent from ABD TERG 1 and 7. R IV+V with (3-) 4 accessory hairs…..Nasonovia altaensis
ANT III without rhinaria. MTu always present on ABD TERG 1 and 7. R IV+V with 2 (-3) accessory hairs…..10
10 Hind femora with long fine hairs, many of them longer than trochantro-femoral suture. Cauda with 11-24 hairs…..Aphis fabae (part)
Hind femora with hairs all shorter than trochantro-femoral suture. Cauda with 9-13 hairs…..11
11 MTu usually present on ABD TERG 2-4 as well as 1 and 7. ANT PT/BASE 2.2-2.5. R IV+V 0.8-0.9 × HT II…..Aphis hasanica*
MTu only sporadically on ABD TERG 2-4. ANT PT/BASE 1.6-2.1. R IV+V 0.6-0.8 × HT II…..Aphis neothalictri*
12 SIPH with a subapical zone of polygonal reticulation (at least 4-5 rows of closed polygonal cells)…..13
SIPH without any distinct polygonal reticulation (sometimes with 1-3 subapical rows of interconnecting transverse striae)…..15
13 SIPH black, with polygonal reticulation on distal 0.3-0.4 of length. ANT black, except at base of III. Cauda dark…..Sitobion thalictri
SIPH, ANT and cauda mainly pale. SIPH reticulated on distal 0.08-0.2 of length …..14
14 SIPH distinctly swollen proximal to reticulated part. Hairs on ANT III not exceeding 0.5 × BD III…..Illinoia thalictri
SIPH cylindrical on distal part (sometimes with reticulated part somewhat constricted). Longest hairs on ANT III 0.6-1.0 × BD III…..Macrosiphum euphorbiae
15 Head densely spiculose, dorsally as well as ventrally. ANT tubercles well developed with inner faces scabrous and steep-sided…..16
Head not spiculose. ANT tubercles if well developed then with smooth, divergent inner faces…..17
16 SIPH slightly clavate. ANT III without rhinaria…..Myzus persicae
SIPH tapering/cylindrical. ANT III amost always with 1-2 (-3) small rhinaria on basal part…..Aulacorthum solani
17 ANT III with 5-19 rhinaria…..18
ANT III with 0-2 rhinaria…..19
18 SIPH wholly pale. R IV+V 0.9-1.0 × HT II. Hairs on ABD TERG 3-5 are 0.7-0.8 × ANT BD III…..Nasonovia saurotarbagataica
SIPH dark or dusky towards apices. R IV+V 0.6-0.9 × HT II. Hairs on ABD TERG 3-5 are 0.2-0.4 × ANT BD III…..Nasonovia purpurascens
19 ANT tubercles well developed, ANT 0.9-1.4 × BL, PT/BASE c.3.8-3.9. SIPH 2.4-3.0 × cauda…..Acyrthosiphon ranunculum*
ANT tubercles absent or weakly developed. ANT 0.5-0.8 × BL, PT/BASE 2.0-3.5. SIPH 1.0-2.5 × cauda…..20
20 SIPH not dark. ABD TERG 1 and 7 without marginal tubercles (MTu). First tarsal segments with 4 hairs…..Thalictrophorus thalictrophilus*
SIPH dark. ABD TERG 1 and 7 with MTu. First tarsal segments with 2-3 hairs…..go to key to polyphagous aphids, starting at couplet 24
ThamnocalamusPoaceae
Thamnocalamus spathaceus = Fargesia spathacea
Thamnocalamus sp. Melanaphis meghalayensis

See key to bamboo-feeding aphids under Bambusa.

ThamnoserisAsteraceae
Thamnoseris lacerata Brachycaudus helichrysi
ThapsiaApiaceae
Thapsia garganica Anuraphis pyrilaseri; Aphis fabae;
Dyaphis apiifolia, crataegi ssp. kunzei
Th. villosaAphis craccivora, fabae; Cavariella aegopodii;
Myzus persicae; Semiaphis dauci

Key to apterae on Thapsia:-

1 SIPH very short, only about 0.5 × cauda, and flangeless…..Semiaphis dauci
SIPH more than 0.8 × cauda, with a distinct flange…..2
2 ABD TERG 8 with a posteriorly projecting process above cauda. SIPH clavate. ANT PT/BASE 0.6-1.3…..Cavariella aegopodii
No supracaudal process. SIPH tapering/cylindrical, or slightly clavate. ANT PT/BASE more than 1.5…..3
3Cauda helmet-shaped, not longer than its basal width. Well-developed spinal and marginal tubercles (STu and MTu) present…..4
Cauda tongue-shaped, longer than its basal width. STu absent, MTu sporadic or only consistently present on ABD TERG 1 and 7…..go to key to polyphagous aphids, starting at couplet 4
4Head densely spiculose. SIPH shorter than R IV+V, with close-set annular rows of blunt spinules. Cauda with 10-12 hairs. STu on ABD TERG 1-5 …..Anuraphis pyrilaseri
Head not spiculose. SIPH longer than R IV+V, normally imbricated. Cauda with 5 hairs. STu on head and ABD TERG 8…..5
5.Longest spinal hair on ABD TERG 8 is 11-38 μm long. ABD TERG 7 frequently with marginal tubercles (MTu)…..Dysaphis apiifolia
Longest spinal hair on ABD TERG 8 is 55-80 μm long . ABD TERG 7 rarely with MTu…..Dysaphis crataegi ssp. kunzei
ThaspiumApiaceae
Thaspium aureum = Th. trifoliatum var. aureum
Th. barbinodeAphis thaspii
Th. trifoliatumAphis thaspii
Th. trifoliatum var. aureum Aphis thaspii; Cavariella pastinacae

Key to apterae on Thaspium:-

ABD TERG 8 with a backwardly-projecting process above cauda. Head and SIPH pale, SIPH swollen distally. (ANT PT/BASE 2.6-4.0)…..Cavariella pastinacae
No supracaudal process. Head and SIPH dusky/dark. SIPH tapering …..Aphis thaspii
ThaumatococcusMarantaceae
Thaumatococcus daniellii Pentalonia nigronervosa
Thea see CamelliaTheaceae
ThelepogonPoaceae
Thelepogon elegans Aphis gossypii

(or use key to apterae of grass-feeding aphids under Digitaria)

ThelespermaAsteraceae
Thelesperma megapotamicum Aphis coreopsidis; Brachycaudus helichrysi

Use key to apterae on Bidens.

ThelymitraOrchidaceae
Thelymitra longifolia Macrosiphum euphorbiae

(or try key to orchid-feeding aphids under Cymbidium)

Thelypteris (including Lastrea) Thelypteridaceae
Thelypteris confluens Macrosiphum dryopteridis, lambi
Th. dentata = Christella dentata
Th. dryopteris = Gymnocarpium dryopteris
Th. ligocarpa (?)Idiopteris nephrelepidis
Th. palustris = Th. confluens
Th. phegopteris = Phegopteris connectilis
Th. quelpaertensis Amphorophora ampullata, scabripes
Thelypteris spp.Micromyzella filicis; Micromyzodium filicium

Use key to apterae of fern-feeding aphids under Polypodium.

Themeda ( including Anthistiria) Poaceae
Themeda arguens Hysteroneura setariae;
Sitobion graminis, javanicum, lambersi
Th. ciliata = Th. quadrivalvis
Th. coromandeliana (?) Melanaphis sacchari
Th. quadrivalvis Sitobion rosaeiformis
Th. triandraBaizongia pistaciae; Sipha maydis;
Sitobion avenae, graminis, [Sitobion sp. (Millar 1994)]
Th. villosaCeratovacuna lanigera

Use key to apterae of grass-feeding aphids under Digitaria.

TheobromaSterculiaceae
Theobroma cacaoAphis aurantii, gossypii, spiraecola;
Cervaphis rappardi, schouteniae;
Sitobion martorelli

Key to apterae on Theobroma:-

1 Body with very long, branched, hair-bearing marginal processes…..2
Body without such processes…..3
2 Dorsal abdominal hairs all more-or-less acute, lanceolate, or sometimes slightly bifurcate. Marginal processes on abdomen either with one type of hair (usually bifurcate) at ends of lateral branches or with, near the base, one or two dorsal branches with a thin, acute hair…..Cervaphis schouteniae
Dorsal abdominal hairs very blunt, often club-shaped with nearly globular apices, and extremely numerous. Marginal processes on abdomen with pointed or bifurcate hairs at ends of lateral branches, but dorsal branches bearing very blunt or club-shaped hairs like those on on mid-dorsal processes…..Cervaphis rappardi
3Body elongate spindle-shaped, with well-developed ANT tubercles, their inner faces smooth and divergent. SIPH long and dark except at bases, with a subapical zone of polygonal reticulation on about distal 0.2 of length…..Sitobion martorelli
Without that combination of characters..…go to key to polyphagous aphids
ThereianthusIridaceae
Thereianthus spicatus Macrosiphum euphorbiae

(or use key to apterae on Iris)

ThermopsisFabaceae
Thermopsis divaricarpa Macrosiphum zionense
Th. gracilisMacrosiphum albifrons
Th. montanaMacrosiphum albifrons, zionense
Th. montana var. venosa = Th. gracilis
Th. pinetorum = Th. divaricarpa
Thermopsis sp.Aphis asclepiadis

Key to apterae on Thermopsis:-

1 SIPH dark with a subapical zone of polygonal reticulation. ANT and tibiae black…..Macrosiphum zionense
SIPH if dark then without polygonal reticulation. ANT and tibiae pale, or with paler basal sections…..2
2 SIPH pale or dusky with subapical polygonal reticulation. ANT III with 17-40 rhinaria…..Macrosiphum albifrons
Without that conbination of characters…..go to key to polyphagous aphids
ThesiumSantalaceae
Thesium aggregatum Sitobion africanum
Th. chinenseAphis neothesii
Th. divaricatumMacrosiphum albertinae
Th. dollineriAphis thesii
Th. intermediumMacrosiphum albertinae
Th. linophyllonAphis thesii
Th. linophyllumMacrosiphum albertinae
Th. ramosumAphis thesii

Key to apterae on Thesium:-

1 SIPH without any polygonal reticulation. Cauda dark. Prothorax and ABD TERG 1 and 7 with hemispherical marginal tubercles (MTu). Dorsum usually with dark sclerotisation completely of partly fused between ABD TERG 2-4(-6) to form a solid or perforated shield…..2
SIPH with a subapical zone of polygonal reticulation. Cauda pale. Prothorax and ABD TERG 1 and 7 without MTu. Dorsum if with dark markings then these are not fused between tergites…..3
2 R IV+V 1.05-1.25 × HT II. Posterior hair on hind trochanter maximally c. 0.25 × diameter of trochantro-femoral suture. Dorsal shield usually perforated between tergites…..Aphis thesii
R IV+V 0.8-0.9 × HT II. Posterior hair on hind trochanter 0.4-0.5 × diameter of trochantro-femoral suture. Dorsal shield not usually perforated between tergites …..Aphis neothesii
3 Dorsal abdomen with variably developed segmental dark markings, sometimes absent. ANT III with 1-3 rhinaria, and with longest hairs 0.2-0.4 × BD III. SIPH entirely black…..Sitobion africanum
Dorsal abdomen membranous. ANT III with 10-15 rhinaria, and longest hairs 0.6-1.0 × BD III. SIPH mostly black but paler at base…..Macrosiphum albertinae
ThespesiaMalvaceae
Thespesia acutiloba Aphis gossypii
Th. danis[Aphis sp. (Millar 1994)]
Th. populneaAphis gossypii
ThevetiaApocynaceae
Thevetia peruviana = Cascabela thevetia
ThinopyrumPoaceae
Thinopyrum intermedium = Elymus hispidus
ThlaspiBrassicaceae
Thlaspi alpestreBrevicoryne brassicae
Th. alpinum = Th. alpestre
Th. arvenseAphis craccivora, gossypii, nasturtii;
Aulacorthum solani;
Lipaphis erysimi, [lepidii], pseudobrassicae;
Macrosiphum euphorbiae; Myzus persicae;
Neomyzus circumflexus; [Sitobion avenae];
Smynthurodes betae
Th. aureum (?)Aphis fabae
Th. fendleri = Noccaea fendleri
Th. goesingenseBrevicoryne brassicae

Use key to apterae on Brassica.

Thrincia see LeontodonAsteraceae
ThuidiumThuidiaceae
Thuidium tamariscifolium = Th. tamariscinum
Th. tamariscinumJacksonia papillata; Pseudacaudella rubida

Use key to moss-feeding aphids under Polytrichum.

ThujaCupressaceae
Thuja dolabrata = Thujopsis dolabrata
Th. occidentalisCinara cupressi, [juniperi], louisianensis, tujafilina
Th. orientalis = Platycladus orientalis
Th. plicataCinara cupressi, tujafilina; Illinoia morrisoni;
[Myzus persicae]
Th. standishiiCinara tujafilina

Use key to aphids on Cupressus.

ThujopsisCupressaceae
Thujopsis dolabrata Cinara tujafilina
ThunbergiaAcanthaceae
Thunbergia alataAphis aurantii, gossypii; Myzus persicae
Th. coccineaAphis spiraecola; Myzus ornatus
Th. erectaAphis gossypii
Th. fragransAphis aurantii, spiraecola
Th. grandiflora = Th. alata
Th. lancifoliaAphis gossypii

Use key to polyphagous aphids.

ThuniaOrchidaceae
Thunia albaCerataphis orchidearum
ThymbraLamiaceae
Thymbra capitata Aphis gossypii, serpylli, Aphis sp. (Cocuzza et al. 2014)

Use key to apterae on Thymus.

ThymusLamiaceae
Thymus alternans = Th. roegneri
Th. arcticus = Th. praecox ssp. ligusticus
Th. austriacus = Th. odoratissimus
Th. chamaedrys = Th. pulegioides ssp. chamaedrys
Th. calcareus Aphis serpylli
Th. cretaceus = Th. calcareus
Th. ×dimorphusAphis serpylli
Th. drucei = Th. praecox ssp. ligusticus
Th. glabrescens = Th. odoratissimus
Th. kerneri = Th. praecox ssp. polytrichus
Th. longicaulisAphis serpylli
Th. marschallianus = Th. pulegioides ssp. pannonicus
Th. mastichinaAphis mastichinae, serpylli
Th. odoratisssimus Aulacorthum solani; Myzus persicae
Th. pannonicus = Th. pulegioides ssp. pannonicus
Th. praecox (incl. sspp. Aphis serpylli; Myzus ornatus
ligusticus, polytrichus)
Th. pseudolanuginosus = Th. praecox ssp. ligusticus
Th. pulegioides (incl. sspp. Aphis serpylli
chamaedrys, pannonicus)
Th. roegneri Aphis serpylli
Th. serpyllumAphis serpylli; Eucarazzia elegans;
Kaltenbachiella pallida; Neomyzus circumflexus;
[Ovatus crataegarius]
Th. striatusAphis [Aphis sp. (Cocuzza et al. 2014)]
Th. vulgarisAphis [craccivora], serpylli, [Aphis sp. (Cocuzza et al. 2014)];
Myzus ornatus
Th. zygisAphis serpylli
Thymus sp.Myzus ascalonicus

Key to apterae on Thymus:-

1 ANT usually 4-segmented, 0.12-0.15 × BL, with PT/BASE less than 0.5. Eyes 3-facetted. SIPH absent. Legs very short, with fore- and mid-tarsi usually 1-segmented. Dorsal wax glands present on head, thorax and ABD TERG 1-8, comprising facets surrounding an elongate central area…..Kaltenbachiella pallida
ANT 5- or 6-segmented, more than 0.5 × BL, with PT/BASE more than 1. Eyes multifacetted, SIPH present, tarsi 2-segmented and wax glands not evident …..2
2 SIPH strongly swollen, with maximum diameter of swollen part more than 2× minimum diameter of stem, smooth except for a little subapical polygonal reticulation (Fig.48a). SIPH 5.4-8.2 × cauda…..Eucarazzia elegans
SIPH not swollen or much less swollen, and less than 3.5 × cauda…..3
3 SIPH 0.54-1.33 × cauda, both black. ABD TERG 1 and 7 with marginal tubercles (MTu). Head without spicules, and with ANT tubercles weakly developed…..4
Without that combination of characters …..go to key to polyphagous aphids, starting at couplet 5
4 ABD TERG 2-6 usually without MTu. Caudal hairs long….. Aphis serpylli
ABD TERG 2-6 with large flat MTu. Caudal hairs short ….. Aphis mastichinae
Thyrsostachys Poaceae
Thyrsostachys siamensis Ceratovacuna doipuensis
ThysanolaenaPoaceae
Thysanolaena agrostis = Th. latifolia
Th. latifoliaPseudoregma panicola; Sitobion miscanthi
Th. maxima[Glyphinaphis bambusae]; Melanaphis sacchari;
Pseudoregma panicola

Use key to apterae of grass-feeding aphids under Digitaria.

TiarellaSaxifragaceae
Tiarella cordifoliaAulacorthum solani; Nasonovia tiarellae
Tiarella sp.Macrosiphum euphorbiae

(Apterae of Nasonovia tiarellae are undescribed, but will be distinguishable from those of A. solani and other polyphagous aphids by the large thoracic spiracles, R IV+V about 1.8-2.4 × HT II, and ANT PT/BASE at least 6.)

TibouchinaMelastomataceae
Tibouchina granulosa Aphis spiraecola; Paoliella flava
T. holosericeaMyzus ornatus
T. moricandianaMyzus ornatus
T. sellowianaMyzus ornatus
T. semidecandraAphis gossypii, nasturtii, spiraecola;
Aulacorthum solani; Macrosiphum centranthi;
Myzus ornatus, persicae
T. urvilleanaMyzus ornatus
T. vimineaMyzus ornatus
T. weddelliiMyzus ornatus

Key to apterae on Tibouchina:-

1 Dorsum with long thin finger-like spinal and marginal processes. ANT 4-segmented, with PT/BASE less than 1…..Paoliella flava
Dorsum without processes. ANT 5- or 6-segmented, with PT/BASE more than 1.5 …..2
2 SIPH with a subapical zone of polygonal reticulation. Apices of femora and SIPH dark. ANT 1.2-1.6 × BL. Longest hairs on ABD TERG 3 are 33-50 mm long. Cauda with 11-19 hairs…..Macrosiphum centranthi
SIPH are without polygonal reticulation and/or other characters are not in that combination…..go to key to polyphagous aphids
TidestromiaAmaranthaceae
Tidestromia lanata (?lanuginosa) Aphis craccivora
TigridiaIridaceae
Tigridia sp.Dysaphis tulipae
TilesiaAsteraceae
Tilesia baccataAphis gossypii, spiraecola

Use key to polyphagous aphids.

Tilia Basswood, Lime, Linden Tiliaceae
Tilia americanaAmerican Lime
(incl. var. heterophylla) Aphis spiraecola; Aulacorthum solani;
Eucallipterus tiliae; Longistigma caryae;
Macrosiphum tiliae; Tiliphagus lycoposugus
T. amurensis (incl. var. taquetii)Korean Lime
Eucallipterus tiliae; Patchiella reaumuri ssp. orientalis;
Rhopalosiphoninus tiliae;
Tiliaphis coreana, shinae, shinjii
T. begoniifolia = T. dasystyla ssp. caucasica
T. cordataSmall-leafed Lime
Eucallipterus tiliae; Patchiella reaumuri; Tiliaphis shinae;
Stomaphis wojciechowskii
T. dasystyla (incl. ssp. caucasica) Eucallipterus tiliae; Patchiella reaumuri
T. ×euchloraEucallipterus tiliae
T. ×europaeaCommon Lime, Linden
Aphis fabae; Eucallipterus tiliae; Patchiella reaumuri
T. grandifolia = T. platyphyllos
T. insularisTiliaphis shinae, shinjii
T. japonicaEucallipterus tiliae, [tilicola (Shinji 1933)]
Rhopalosiphoninus tiliae; Tiliaphis shinae, shinjii
T. komarovii = T. amurensis
T. mandshuricaRhopalosiphoninus tiliae; Tiliaphis coreana, shinae
T. maximowicziana Prociphilus oriens; Rhopalosiphoninus tiliae;
Tiliaphis shinae
T. miqueliana[Eucallipterus tilicola (Shinji 1933)];
Rhopalosiphoninus tiliae; Tiliaphis shinae
T. mongolica[Eucallipterus tilicola Shinji 1933]
T. miyabeiTiliaphis shinae
T. mongolicaEucallipterus tiliae
T. orientalis (?)Tiliaphis coreana
T. pekingensis = T. mandshurica
T. petiolaris = T. tomentosa
T. platyphyllosLarge-leafed Lime, Red-twigged Lime
(incl. var. rubra) Eucallipterus tiliae; Patchiella reaumuri;
Tiliaphis shinae
T. rubra = T. platyphyllos var. rubra
T. shina = T. japonica
T. sibiricaEucallipterus tiliae
T. taquetii = T. amurensis var. taquetii
T. tomentosaAphis gossypii, [aurantii];
Eucallipterus tiliae; Patchiella reaumuri;
T. tuanShivaphis tilisucta; Tiliaphis coreana, shinae
T. vulgaris = T. ×europaea
Tilia sp.Tiliaphis pseudoshinae

Key to aphids on Tilia:-

1 SIPH absent or present only as inconspicuous pores (forming leaf-nest galls) …..2
SIPH present either as short truncate cones, large pores on broad hairy cones, or long tubes…..4
2 Alata from gall with numerous elongate secondary rhinaria on ANT III-V, not in a single row, protruding as sharp transverse ridges so that the outline is serrate (fig. 115A)…..Tiliphagus lycoposugus
Alata from gall with secondary rhinaria on ANT III-V arranged in a row and not protruding as sharp ridges…..3
3 BL of alata from gall more than 4 mm. Media of forewing unbranched. Antenna with sparse hairs and at least 4 secondary rhinaria on ANT V…..Prociphilus oriens
BL of alata from gall less than 3 mm. Media of forewing once-branched. Antenna with numerous hairs and 0-3 secondary rhinaria on ANT V (fig. 115B) …..Patchiella reaumuri
4 BL more than 5 mm…..5
BL less than 4 mm…..6
5 Rostrum much shorter than body…..Longistigma caryae
Rostrum much longer than body…..Stomaphis wojciechowskii*
6 SIPH tubular, much longer than their basal width. Cauda finger-like or triangular, anal plate entire…..7
SIPH as truncate cones, hardly longer than their basal width. Cauda knobbed, anal plate bilobed (all viviparae alate) …..9
7 SIPH black, markedly swollen over distal 0.7 of length …..Rhopalosiphoninus tiliae
SIPH pale or dark, not at all swollen…..8
8 Aptera with SIPH mainly dark, about 3 × cauda, with a subapical zone of polygonal reticulation; cuticle of head smooth; ANT III with 3-10 secondary rhinaria in a row…..Macrosiphum tiliae
without that combination of characters…..go to key to polyphagous aphids
9Secondary rhinaria on ANT III round to oval, with ciliated rims. Forewing with RS absent or indistinct and costal margin not heavily pigmented…..Shivaphis tilisucta
Secondary rhinaria on ANT III transversely elongate, with rims not ciliated. Costal margin of forewing heavily pigmented and RS present…..10
10 Forewing with separate fuscous patches at ends of veins. Hind femur black except at base. ABD TERG 1-7 with black marginal as well as pleural pairs of sclerites, and dark SIPH…..Eucallipterus tiliae
Forewing with a zig-zag black band joining distal ends of media, Cu1a and Cu1b. Hind femur mainly pale. ABD TERG 1-7 with or without dark markings. SIPH pale …..11
11 Mesothoracic dorsal lobes each with a longitudinal dark stripe. Base of forewing infuscated…..12
Mesothoracic dorsal lobes without longitudinal stripes. Base of forewing clear …..13
12 R IV+V and SIPH both shorter than HT II. ANT III with 19-33 secondary rhinaria…..Tiliaphis coreana
R IV+V and SIPH both longer than HT II. ANT III with 8-16 secondary rhinaria…..Tiliaphis shinjii
13 R IV+V less than 0.8× HT II. Embryos with very short spinal hairs (about 4 µm long) on ABD TERG 1-6…..Tiliaphis pseudoshinae
R IV+V 1.0-1.2× HT II. Embryos with all spinal hairs long (35-40 µm) …..Tiliaphis shinae
TimoniusRubiaceae
Timonius amboinicus Aphis spiraecola
T. compressicaulis = T. finlaysonianus
T. finlaysonianusAphis spiraecola
TinneaLamiaceae
Tinnea aethiopica Aphis gossypii
TinosporaMenispermaceae
Tinospora cordifolia Aphis craccivora
Tinospora sp.Aphis gossypii

Use key to polyphagous aphids.

TipuanaFabaceae
Tipuana tipuAphis craccivora
TithoniaAsteraceae
Tithonia diversifolia Acyrthosiphon bidenticola; Aphis gossypii, spiraecola;
Myzus ornatus; Neomyzus circumflexus;
Uroleucon ambrosiae
T. grandiflora (?)Aphis gossypii
T. rotundifoliaAcyrthosiphon bidenticola; Myzus persicae;
Uroleucon ambrosiae
T. tageteoides (?)Aphis gossypii, spiraecola; [Pseudomegoura nipponica]
T. thurberiUroleucon ambrosiae
T. tubaeformisUroleucon ambrosiae
Tithonia spp.Aphis craccivora; [Uroleucon sp. (Leonard 1972a)]

Key to apterae on Tithonia:-

ANT tubercles well developed with smooth divergent inner faces. ANT dark except at base, with ANT PT/BASE 5.9-7.5. SIPH dark except for basal 0.2-0.3 of length, with any subapical polygonal reticulation restricted to much less than 0.1 of length..…Acyrthosiphon bidenticola
Without that combination of characters…..go to key to polyphagous aphids
TocoyenaRubiaceae
Tocoyena longiflora Aphis gossypii, spiraecola

Use key to polyphagous aphids.

ToddaliaRutaceae
Toddalia aculeata = T. asiatica
T. asiaticaAphis aurantii, odinae, spiraecola
TolmieaSaxifragaceae
Tolmiea menziesii Aulacorthum solani; Macrosiphum tolmiea;
Nasonovia stroyani

Use key to apterae on Tellima.

TolpisAsteraceae
Tolpis barbata[Aphis (Protaphis) sp.]; Uroleucon jaceae
T. fruticosa = T. succulenta
T. succulentaPemphigus bursarius
TomentypnumBrachytheciaceae
Tomentypnum nitens [Pachypappa sacculi]

(Try key to moss-feeding aphids under Polytrichum.)

Toona Meliaceae
Toona ciliata[Forda sp. (orientalis?)]
T. sinensisAphis odinae, aurantii, citricidus

Use key to polyphagous aphids.

TordyliumApiaceae
Tordylium aegyptiacum Aphis fabae
T. apulumAphis fabae
T. maximumAnuraphis subterranea; Aphis fabae;
Cavariella aegopodii, theobaldi; Dysaphis crataegi

Use key to apterae on Conium, which includes all these species.

ToreniaLinderniaceae
Torenia fournieriMyzus persicae
Torenia sp.Aphis nasturtii

Use key to polyphagous aphids.

TorilisApiaceae
T. africana ssp. heterophylla = T. arvensis ssp. heterophylla
T. anthriscus = Anthriscus caucalis
T. arvensis (incl. ssp. heterophylla) Acyrthosiphon ilka;
Aphis craccivora, fabae, [toriliae], umbelliferarum;
Aulacorthum solani; [Brachycaudus lateralis];
Cavariella aegopodii;
Dysaphis [anthrisci], apiifolia, crataegi, foeniculus;
Hyadaphis foeniculi; Macrosiphum euphorbiae;
Myzus ornatus, persicae; Semiaphis anthrisci
T. grandifloraCavariella aegopodii
T. japonica[Anuraphis pyrilaseri]; Aphis fabae, gossypii, spiraecola;
Cavariella aegopodii, archangelicae, [araliae], japonica;
Dysaphis crataegi, crataegi ssp. aethusae,
[Dysaphis sp., U.P., India (Stroyan 1985, 366)];
Macrosiphum gei; Semiaphis anthrisci, heraclei
T. leptophyllaAphis craccivora; Semiaphis anthrisci
T. nodosaAphis fabae; Semiaphis heraclei

Key to apterae on Torilis:-

1 ABD TERG 8 with a wart-like or finger-like medial process, bearing 2 hairs …..Cavariella spp.; use couplets 2-14 of key to apterae on Angelica
ABD TERG 8 without a medial hair-bearing process…..2
2SIPH very small, less than 0.6 × cauda…..3
SIPH more than 0.6 × cauda…..5
3Flat or hemispherical marginal tubercles (MTu) consistently present on ABD TERG 1-5 and 7. Cauda triangular with 6-7 short hairs near apex…..Aphis umbelliferarum
Small MTu occasionally present on ABD TERG 2-5, but never on 1 and 7. Cauda triangular or tongue-shaped with longer hairs…..4
4 SIPH cylindrical or slightly swollen, more than 1.5× their basal width. ABD TERG 2-5 usually with small hemispherical MTu…..Semiaphis anthrisci
SIPH tapering, less than 1.5 × their basal width. MTu absent or rare …..Semiaphis heraclei
5Cauda helmet-shaped, not longer than its basal width. ABD TERG 8, or 7 and 8, usually with spinal tubercles (STu)…..6
Cauda tongue- or –finger shaped, much longer than its basal width. STu usually absent…..8
6 SIPH short and broad-based, rarely more 2 × their basal width. Hairs on frons long and fine, the longest almost as long as ANT I…..Dysaphis foeniculus
SIPH 2.5-3.0 × their basal width. Hairs on frons very short and blunt…..7
7 Posterior hair on hind trochanter 0.24-0.56 (rarely more than 0.5) × length of trochantro-femoral suture. Longest hair on ABD TERG 8 is 11-38 μm, rarely longer than 30 μm. ABD TERG 7 frequently with paired marginal tubercles (MTu) …..Dysaphis apiifolia
Posterior hair on hind trochanter 0.42-1.00 (rarely less than 0.5) × length of trochantro-femoral suture. Longest hair on ABD TERG 8 is 25-80 μm, rarely shorter than 30 μm. ABD TERG 7 frequently without any MTu, and they are rarely paired…..Dysaphis crataegi (incl. ssp. aethusae)
8 SIPH mainly pale, with a supapical zone of polygonal reticulation…..9
SIPH pale or dark, without polygonal reticulation…..10
9 Longest hair on ABD TERG 8 is 38-63 μm, 0.6-1.4 × ANT BD III. Anterior half of subgenital plate usually (77%) with only 2 hairs (18% with 3, 5% with 4-6 hairs)…..Macrosiphum euphorbiae
Longest hair on ABD TERG 8 is 66-106 μm, 1.4-2.0 × ANT BD III. Anterior half of subgenital plate with 2-11 hairs, usually (77%) with 4-8 hairs …..Macrosiphum gei
10 SIPH clavate, dark (except in summer dwarfs) and 0.9-1.4 × cauda. Head smooth with ANT tubercles undeveloped…..Hyadaphis foeniculi
If SIPH are clavate then they are pale and 1.7-2.5 × cauda, and head is spiculose with well-developed ANT tubercles…..11
11 SIPH pale, long, tapering or cylindrical on distal half. ANT tubercles with smooth, broadly divergent inner faces, and median frontal tubercle evident …..Acyrthosiphon ilka
SIPH pale or dark, if pale then ANT tubercles have steep-sided, scabrous inner faces, and median frontal tubercle is undeveloped…..go to key to polyphagous aphids
(but note that specimens running to couplet 33 in that key could be Aphis toriliae*)
Tormentilla see PotentillaRosaceae
TorralbasiaCelastraceae
Torralbasia cuneifolia Aphis aurantii, spiraecola

Use key to polyphagous aphids.

TorreyaTaxaceae
Torreya nuciferaCinara “sp. E” of Eastop et al. 1998 (taiwana?)
TorreyochloaPoaceae
Torreychloa natans Sipha glyceriae
Torrubia see GuapiraNyctaginaceae
Torrubia fragrans = Guapira fragrans
TortellaPottiaceae
Tortella tortuosa[Colopha compressa]

(use key to apterae of moss-feeding aphids under Polytrichum)

TortulaPottiaceae
Tortula muralisMuscaphis musci

(or use key to apterae of moss-feeding aphids under Polytrichum)

TournefortiaBoraginaceae
Tournefortia bicolor Aphis spiraecola
T. glabraAphis spiraecola
T. hirsutissimaAphis aurantii, craccivora, gossypii, spiraecola
T. maculataAphis spiraecola
T. sibiricaMyzus persicae

Use key to polyphagous aphids.

TownsendiaAsteraceae
Townsendia exscapa Myzus persicae
T. sericea = T. exscapa
Toxicodendron Anacardiaceae
Toxicodendron diversilobum Carolinaia rhois, schlingeri
T. orientaleCarolinaia floris
T. radicansAphis odinae;
Carolinaia caricis, carolinensis, floridensis, howardii,
rhois, rhusifoliae, tissoti
T. succedaneum Japanese Sumac, Wax-tree
Aphis odinae; Carolinaia japonica
T. sylvestreAphis odinae
T. trichocarpumAphis odinae; Carolinaia japonica, nigra
T. vernicifluumVarnish Tree
Aphis odinae; Carolinaia japonica;
Stomaphis rhusivernicifluae
T. wallichii[Eutrichosiphum blackmani]

Key to aphids on Toxicodendron:-

This key includes alatae as well as apterae of Carolinaia spp.; couplets 4-21 are based mainly on the key to Carolinaia spp. by Remaudière & Muñoz Viveros (1992).

1Very large aphid, BL about 5 mm or more, with very long rostrum about 1.5× BL…..Stomaphis rhusivernicifluae
BL less than 3 mm. Rostrum much shorter than BL…..2
2Apterae (incl. fundatrices)…..3
Alatae…..15
3SIPH 0.4-0.6 × cauda which bears 12-20 hairs. ABD TERG 1 and 7 with marginal tubercles (MTu). Stridulatory ridges present ventrolaterally on abdominal sternites 5 and 6, and hind tibia with a row of short, peg-like hairs….. Aphis odinae
SIPH relatively longer and cauda with less hairs. ABD TERG 1 and 7 without MTu. No stridulatory ridges nor peg-like hairs on hind tibiae…..4
4 Tergum strongly rugose…..5
Tergum smooth or almost smooth…..6
5 Tergum pale. SIPH slightly clavate with dense, conspicuous imbrication…..fundatrix of Carolinaia caricis
Tergum dark brown. SIPH moderately clavate, with only a little imbrication…..Carolinaia schlingeri
6 SIPH cylindrical, tapering, with slight medial swelling, or only weakly clavate (in which case they are c.8 × longer than their maximum diameter) …..7
SIPH very distinctly clavate (swollen on distal half), and less than 7 × longer than their maximum diameter…..11
7 SIPH pale, and c.5 × their midlength diameter …..fundatrix of Carolinaia tissoti
SIPH dark, and c.6-8 × their midlength diameter. ANT tubercles rugose, and ventral side of head spiculose…..8
8 SIPH c.8 × their midlength diameter. ANT PT/BASE at least 4 (for further confirmation, return to key at couplet 14)…..Carolinaia floridensis (partim)
SIPH c.6 × their midlength diameter. PT/BASE less than 4…..9
9 Fore femora strongly spiculose distally for more than half of length …..Carolinaia nigra
Fore femora smooth or imbricated distally, but without spicules on the imbrications …..10
10 ANT PT/BASE 1.5-2.0. R IV+V 1.0-1.1× HT II…..Carolinaia floris
ANT PT/BASE 2.1-3.0. R IV+V 1.2-1.4× HT II…..Carolinaia japonica
11 ANT tubercles weakly developed, so that front of head is sinuate in dorsal view. ANT shorter than BL. Tergum pale…..12
ANT tubercles well developed, so that there is a deep frontal sinus. ANT longer than BL. Tergum dark…..13
12 SIPH pale, 2.4-3.3 × cauda, which bears 4 hairs …..fundatrix of Carolinaia carolinensis
SIPH dark, only c.2 × longer than cauda, which bears 5 hairs …..Carolinaia rhois
13 R IV+V heart-shaped, bulbous posteriorly. Head smooth ventrally. Cauda paler than SIPH and bearing 5 hairs……Carolinaia howardii
R IV+V not swollen, straight-sided. Head spiculose ventrally. Cauda as dark as SIPH and bearing 4 hairs…..14
14 SIPH markedly clavate, 5-6 × longer than max. diameter of swollen part, and 2.3-2.6 × longer than ANT VI BASE. R IV+V 0.12-0.13 mm long. Spinal tubercles (STu) absent…..Carolinaia rhusifoliae
SIPH slightly clavate, c.8 × longer than max. diameter of swollen part, and 3.0-3.5 × longer than ANT VI BASE. R IV+V 0.09-0.105 mm long. Spinal tubercles (STu) often present on head and sometimes on ABD TERG 8…..Carolinaia floridensis (partim)
15 (Al.) Abdomen with a solid dark sclerotic patch across ABD TERG 3-5, 3-6 or 3-7 …..16
(Al.) Abdomen with or without dark sclerites, but without an extensive solid dark sclerotic patch…..18
16 (Al.) ANT III with 23-31 sec. rhinaria, IV with 9-12 and V with 5-6 …..Carolinaia carolinensis
(Al.) ANT III with less than 15 sec. rhinaria, IV with less than 4, V with none …..17
17 (Al.) Hind wing with 2 oblique veins. ANT tubercles weakly developed, not projecting forward beyond median frontal tubercles in dorsal view. Dorsal abdominal patch not extending beyond ABD TERG 6. Cauda pale with 5 hairs. ANT PT/BASE less than 3, R IV+V c 0.9 × HT II, SIPH c. 2 × cauda…..Carolinaia schlingeri
(Al.) Hind wing with one oblique vein. ANT tubercles extending forward far beyond middle part of head in dorsal view. Dorsl abdominal patch extending from ABD TERG 3-7. Cauda as dark as SIPH and bearing 4 hairs. ANT PT/BASE more than 4, R IV+V c.1.1 × HT II, SIPH c. 3 × cauda…..Carolinaia floridensis
18 (Al.) ANT PT/BASE less than 3…..19
(Al.) ANT PT/BASE more than 3…..20
19 (Al.) Hind wing with one oblique vein. Cauda with 4 hairs. …..Carolinaia caricis or Carolinaia tissoti
(Al.) Hind wing with 2 oblique veins. Cauda with 5 hairs …..Caroliniaia floris
20 (Al.) SIPH cylindrical…..21
(Al.) SIPH clavate…..22
21 (Al.) Cuticle of mesosternum granulose. Femora coarsely imbricated. ANT tubercles weakly developed, not projecting forward further than the median ocellus …..Carolinaia nigra
(Al.) Cuticle of mesosternum smooth. Femora smooth or only weakly imbricated towards apices. ANT tubercles well developed…..Carolinaia japonica
22 (Al.) R IV+V heart-shaped, short (0.096-0.11 mm long). HT II 0.09-0.10 mm. ANT PT/BASE 4.3-5.5…..Carolinaia howardii
(Al.) R IV+V straight-sided, 0.12-0.14 mm long. HT II 0.12-0.15 mm. ANT PT/BASE 3.3-4.1…..Carolinaia rhois
ToxicoscordionMelanthiaceae
Toxicoscordion nuttallii Uroleucon martini
T. venenosumMacrosiphum kiowanepum

Key to apterae on Toxicoscordion:-

(Both species have long and mostly dark ANT, legs and SIPH, the latter being 0.8-1.3 mm long)

ANT III with 3-8 rhinaria on basal half. SIPH reticulated on distal 0.12-0.17 of length…..Macrosiphum kiowanepum
ANT III with c.30 rhinaria over most of length. SIPH reticulated on distal 0.27-0.31…..Uroleucon martini*