THE APHIDS

 

 

         SYSTEMATIC TREATMENT OF APHID GENERA

        (in alphabetical order)

 

J

 

Jacksonia

Juncobia

 

 

Jacksonia Theobald

Aphidinae: Macrosiphini

 

Four species related to Myzus but with distinctive siphunculi. One species, J. sikkimensis M.R. Ghosh, R.C. Basu & Raychaudhuri, is described from alatae only, on an unidentified grass in India. Another, J. gibbera Qiao, Li, Zhang & Su is described from an unidentified leguminous plant in Shaanxi province, China. Li et al. (2013) reviewed the genus and provided a key to apterae.

Jacksonia campanulata Chakrabarti & Raychaudhuri    Appearance in life is unrecorded ; BL c.1.0-1.1 mm. On Campanula spp. in northern India.

Jacksonia papillata Theobald  Plate 18c   Apterae are brownish green, olive-green, dull greenish yellow or reddish, slightly wax-powdered on underside, with brown head, antennae and legs, dark-tipped siphunculi and dark cauda; BL 1.5-1.9 mm. Alatae are rare; they are dark green with an extensive dark sclerotic pattern, and secondary rhinaria distributed III 20-32, IV 7-18, V 1-6. On various grasses (Dactylis, Deschampsia, Festuca, Poa), living cryptically on colourless basal parts of stems, not visited by ants. Often recorded from moss samples, not surprisingly in view of its habitat, but it is suspected to sometimes feed on mosses (Müller 1973b), and there are also records, probably casual occurrences, from potato (original description), Lysimachia and Veronica (Heie 1994). In regions with temperate oceanic climates throughout the world, including many oceanic islands (e.g. Iceland, Faroes, Azores, Auckland Is., Macquarie Is., South Georgia). Apparently anholocyclic; oviparae have never been found, but males that are possibly this species (but might be another, undescribed species of Jacksonia) are rather regularly caught in suction traps in England during mild spells in winter (Blackman 2010).

 

Juncobia Quednau

Saltusaphidinae

 

One species associated with Juncus, closely related to Iziphya. The antennal terminal process is very short, and the dorsal hairs are all fan-shaped and without tuberculate bases. Quednau (2010) illustrated apterous and alate vivparae.

Juncobia leegei (Börner)  Plate 4e   Apterae are yellowish with blackish grey markings; BL 1.6-1.9 mm. On leaves of Juncus spp., in wet situations visited by ants. The original host record from Carex was in error – see Börner 1952.  In Europe, Turkey (Remaudière et al. 2006) and Kazakhstan (Kadyrbekov 2003c, as Iziphya bufo).  Alatae have bordered wing veins with dark patches at the apices. Monoecious holocyclic; oviparae and apterous males were collected in Sweden in late August (Ossiannilsson 1959, Heie 1982).