Pachypappa tremulae (Linnaeus, 1761)

Albrecht, Anders Christian, 2015, Identification guide to Nordic aphids associated with mosses, horsetails and ferns (Bryophyta, Equisetophyta, Polypodiophyta) (Insecta, Hemiptera, Aphidoidea), European Journal of Taxonomy 145, pp. 1-55 : 27

Pachypappa tremulae (Linnaeus, 1761)

Fig. 19E

Diagnosis

Apterae 1–2 mm. Resembling P. populi . Cells in abdominal wax gland plates with a larger central spot (as in Fig. 19B ). Segments 1 and 2 of all tarsi distinctly separated from each other. Spines at apices of tibiae very robust, much stronger than hairs on first tarsal segment. Dorsal hairs on hind tibia with fairly short and blunt apices. Life cycle as in the previous species. Anholocyclic hibernation on roots of spruce Picea is common.

Distribution

D F N S. See also Carter & Danielsson (1991).

Figures

Fig. 19. Gootiella, Pachypappa and Pachypappella. Apt. alienicolae (born on secondary host). A–B. Spinal wax gland on abd. terg. 6 of Pachypappa populi (Linnaeus, 1758) (A) and P. vesicalis Koch, 1856 (B). C. Hind leg of Gootiella tremulae Tullgren, 1925. D–G. Hind tibia and tarsus of Pachypapella lactea (Tullgren, 1909) (D), Pachypappa tremulae Tullgren, 1925 (E), P. populi (Linnaeus, 1758) (F) and P. vesicalis Koch, 1856 (G). A–B and D–G after Carter & Danielsson 1991, C after Danielsson 1990b. All modified.