Pachypappa vesicalis Koch, 1856

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 vesicalis Koch, 1856

Fig. 19B, G

Diagnosis

Diagnosis based on Carter & Danielsson (1991). Resembling P. populi . Antenna usually 5-segmented, PT extremely short. Cells in abdominal wax gland plates with a larger central spot ( Fig. 19B ). Spines at apices of tibiae very robust, much stronger than the hairs on first tarsal segment. Dorsal hairs on hind tibia with long, pointed apices. Dioecious. Alternates between white poplar Populus alba (Salicaceae) and Picea roots ( Pinaceae ) where the aphids live in wax nests similar to those of Pachypapella lactea ( Carter & Danielsson 1991) .

Distribution

F S.

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.