Epopostruma angulata

Epopstruma angulata has been collected only once in a litter sample taken from a South Australian mallee site.

Identification
Epopostruma angulata is similar to Epopostruma kangarooensis but differs in having the petiolar spines narrower, the posterior margin of the head more deeply concave (the angle between its sides approximately 90°) and the postpetiole lower and more rounded.

Identification Keys including this Taxon

 * Key to Epopostruma Species

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 *  angulata. Epopostruma angulata Shattuck, in Bolton, 2000: 62 (w.) AUSTRALIA.

Description
In full face view the lateral margin of the head between the eye and the posterior corner divided by a distinct angle. Posterior margin of head deeply concave, the angle between its sides approximately 90°. Pronotal spines present, distinct. Posterior section of metanotum in approximately the same plane as the dorsal face of propodeum, the junction of these plates a very weak depression. Posterior face of propodeum between bases of spines and propodeal lobes with thin flanges. Petiolar spines present, directed more or less vertically, their tips approximately as wide and the maximum petiolar width. Anterior face of postpetiole shorter than the dorsal face and separated from it by a broadly rounded convexity; sides approximately vertical and rounding gradually from dorsal to posterior surfaces, in dorsal view the posterolateral corners forming thin, angular flanges. Dorsum of petiole, postpetiole and gaster with short erect hairs, the majority with curved tips. First gastral tergite with indistinct sculpturing giving a matte appearance; area immediately behind attachment with gaster with short longitudinal rugae. Body colour yellow-red, with light infuscation on dorsum of head, posterior section of alitrunk, petiole, postpetiole and legs.

Measurements

Holotype worker. TL 3.75mm, HL 0.83mm, HW 0.81mm, CI 96, MandL 0.45mm, MandI 54, SL 0.54mm, SI 67, PronW 0.56mm, ML 0.97mm.