The Find-a-Spider Guide

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Cataxia spinipectoris

Fact Box
Species:
Cataxia spinipectoris
(or a closely related species; name used here suggested by Dr R. Raven - see notes below)
Family:
Idiopidae
formerly Ctenizidae
Body length:
female: 30 mm
male: 22 mm
Habitat:
Males are mostly found above ground in Autumn; the female is unknown
Toxicity:
Venom toxicity uncertain; spider should be handled with caution
Cataxia spinipectoris
Click to enlarge
Male from side
Click to enlarge
Underneath male
Click to enlarge
The male palps

This spider is usually found in black soil areas of the Darling Downs south-west of Toowoomba. Males are found during autumn and early winter but not in the large numbers that are typical of the Toowoomba Euoplos trapdoor species. The male is golden brown whereas the more common Euoplos male is a dark chocolate colour. In addition, it does not have the double spur on the inside of the first pair of legs that Euoplos has. This lack of a spur is also a characteristic of Arbanitis longipes but the spider shown here is slightly larger and has a forward curving (U-shaped) fovea on its capapace whereas that of A. longipes is straight. Dr Roberrt Raven (Queensland Museum) has indicated that Cataxia spinipectoris is a species known to be present in the Toowoomba district and the spider shown in the above images is compatible with the appearance of that species.

Spider(s) with a very similar appearance: Euoplos species, Euoplos variabilis flavomaculata and Cataxia pulleinei.


Email Ron Atkinson for more information.    Last updated 13 August 2018.