Paul WhitingtonBatch 6

Pseudoperga lewisii (PERGINAE)

Paul WhitingtonBatch 6
Pseudoperga lewisii (PERGINAE)

Workbook

Detailed description of an adult female Pseudoperga lewisii, collected by Jenny Emeny at her property at Cudgee, near Warrnambool, VIC.
Living insect shown in this iNaturalist observation.

Following images show living and euthanised insect. The latter has lost its natural colour and dark areas have appeared in on the head and thorax which are not present in life.

Notes accompanying these images were taken from Westwood (1836, 1880) and Benson (1939) as well as iNaturalist observations. The latter reveal variation in features which were not apparent in the small number of type specimens used for the original descriptions.

Featured
iNaturalist observation - @jemeny - female above dark yellow-orange - antenna pale (can be partially dark but never solid black) - head and thorax above with a dark line on each side (head line not evident in this specimen) - head large, quadrate,
female, #PW108
female, #PW108

iNaturalist observation - @jemeny
- female above dark yellow-orange
- antenna pale (can be partially dark but never solid black)
- head and thorax above with a dark line on each side (head line not evident in this specimen)
- head large, quadrate, nearly equalling thorax in breadth
- stigma large

female, #PW108
- furrows separating anterior and lateral lobes of mesoscutum barely evident - scutellum anteriorly rounded; hind lobes obliquely truncated, short
female, #PW108
female, #PW108

- furrows separating anterior and lateral lobes of mesoscutum barely evident
- scutellum anteriorly rounded; hind lobes obliquely truncated, short

female, #PW108
P4180197-Edit-scale.jpg
female, #PW108
female, #PW108
female, #PW108
- antenna clavate; club longer than preceding 3 segments; first joint subglobular; second shortest; third, fourth and fifth cylindric, and of equal length; sixth large, elongate, ovate, and longer than the 3 preceding joints taken together - longe
female, #PW108
female, #PW108

- antenna clavate; club longer than preceding 3 segments; first joint subglobular; second shortest; third, fourth and fifth cylindric, and of equal length; sixth large, elongate, ovate, and longer than the 3 preceding joints taken together
- longer than front margin of clypeus (1.9mm vs 1.6mm), longer than distance between insertions (1.9mm vs 1.3mm), not longer than head (1.9mm vs. 2.4mm)

female, #PW108
clypeus very wrinkled
female, #PW108
female, #PW108

clypeus very wrinkled

female, #PW108
upper part of head without any shining interspaces among punctures
female, #PW108
female, #PW108

upper part of head without any shining interspaces among punctures

female, #PW108
iNaturalist observation - @jemeny - body yellow below - mid and hind legs (only hind legs here) with apex of tibia, apex of first joint and nearly the whole of the subsequent joints of tarsi black - stigma large, almost linear and narrow - dorsum
female, #PW108
female, #PW108

iNaturalist observation - @jemeny
- body yellow below
- mid and hind legs (only hind legs here) with apex of tibia, apex of first joint and nearly the whole of the subsequent joints of tarsi black
- stigma large, almost linear and narrow
- dorsum of abdomen uniformly yellow-orange, lacking dark marks
- white blotches on lateral edges of all terga

female, #PW108
- mid and hind legs (only hind legs here) with apex of tibia, apex of first joint and nearly the whole of the subsequent joints of tarsi black
female, #PW108
female, #PW108

- mid and hind legs (only hind legs here) with apex of tibia, apex of first joint and nearly the whole of the subsequent joints of tarsi black

female, #PW108
- pronotum indented on posterior border - mesopleurae at least in middle densely, regularly punctured
female, #PW108
female, #PW108

- pronotum indented on posterior border
- mesopleurae at least in middle densely, regularly punctured

female, #PW108
P4180160-Edit-Pano-Edit.jpg
female, #PW108
female, #PW108
female, #PW108
genitalia dissected from abdomen, showing lance and pair of lancets
female, #PW108
female, #PW108

genitalia dissected from abdomen, showing lance and pair of lancets

female, #PW108
pair of lancets
female, #PW108
female, #PW108

pair of lancets

female, #PW108
lance - lateral view
female, #PW108
female, #PW108

lance - lateral view

female, #PW108
lance - dorsal view
female, #PW108
female, #PW108

lance - dorsal view

female, #PW108
distal region of a lancet with teeth
female, #PW108
female, #PW108

distal region of a lancet with teeth

female, #PW108
tip of lancet
female, #PW108
female, #PW108

tip of lancet

female, #PW108
mid part of lancet
female, #PW108
female, #PW108

mid part of lancet

female, #PW108
single tooth (serrula) in mid region of lancet compare to following image from Morice (1919)
female, #PW108
female, #PW108

single tooth (serrula) in mid region of lancet
compare to following image from Morice (1919)

female, #PW108
photomicrograph of saw of Pseudoperga lewisii - Morice (1919) Pl. 14, Fig. 13
female, #PW108
female, #PW108

photomicrograph of saw of Pseudoperga lewisii - Morice (1919) Pl. 14, Fig. 13

female, #PW108

References

Benson, R.B. (1939) A revision of the Australian sawflies of the genus Perga Leach, sens. lat. (Hymenoptera, Symphyta). The Australian Zoologist 9: 324-357.

Westwood, J.O. (1836) P. 234 in postscript to Lewis, R.H., Case of maternal attendance on the larva by an insect of the tribe of Terebrantia, belonging to the genus Perga, observed at Hobarton, Tasmania. Transactions of the Entomological Society of London 1: 232-234.

Westwood, J.O. (1880) A monograph of the sawflies composing the Australian genus Perga of Leach. Proceedings of the Zoological Society of London 1880: 359-379.

This is a workbook page … a part of our website where we record the observations and references used in making species identifications. The notes will not necessarily be complete. They are a record for our own use, but we are happy to share this information with others.