Pronotum broadened in anterior half by an obvious lateral flange extension; body shape relatively short; fore tibia with a very pronounced toothed flange; head with conspicuous hairs, a prominent depression at vertex, frons with complex sculpturing and eyes strongly angled outwards ventrally in frontal view; yellowish to testaceous colouration at junction of meso- and meta sternal plates.

Until April 2024, the listing of this species for SA was based on an early collection labelled as 'S. Australia' and determined by H.J. Carter. It was supported by a dead and degraded salt lake specimen collected from near Scrubby Peak and which I had tentatively identified as C. amplicollis. A series of specimens with weakly bidentate pronotum margin flanges formerly placed with C. amplicollis are now treated as belonging to a different taxon (see C. sp. Bidentate pronotum).

In the period 9th January to 19th April 2024, I collected five females and a single male from woodland communities dominated by Mulga (Acacia aneura complex), Myall (A. papyrocarpa) and Black Oak (Casuarina pauper) in the Gairdner Torrens (GT) Region. These were consistent in their pronotum shape which was expanded in the anterior, and a good match with the degraded Scrubby Peak salt lake specimen.