Ants in the genus Mesostruma are uncommon and form small colonies in soil, usually under or between rocks. They are predacious, foraging primarily on the ground in leaf litter but also occasionally on low vegetation. Roughly half the species have only been collected once. The remainder of the species are not well known either, at least in terms of the number of collections and what is known regarding their biology.
This species can be separated from the similar Mesostruma turneri by the irregular, very short rugae overlying the smooth integument of the first gastral tergite immediately posterior of the postpetiolar insertion (this area contains evenly spaced, elongate rugae over fine microreticulations in M. turneri) and the elongate head (CI < 95, the head of M. turneri is essentially square - CI 96 – 103).
Keys including this Species
- Key to Australian Mesostruma Species
- Key to Mesostruma of the southwestern Australian Botanical Province
Heterick (2009) - Described from SA, in WA this species has been recorded south-east of Cocklebiddy and at Queen Victoria Spring Nature Reserve, east of Kalgoorlie, and may occur in the far south-east of the Province.
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- inornata. Mesostruma inornata Shattuck, in Bolton, 2000: 51 (w.) AUSTRALIA.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
HOLOTYPE. TL 3.3, HL 0.81, HW 0.77, CI 95, ML 0.34, MI 42, SL 0.39, SI 51, PW 0.47, AL 0.87. Head longer than broad (CI 92 - 95), its posterior margin relatively deeply concave. In dorsal view the anterolateral pronotum rounded. Dorsum of mesosoma with dense, shallow foveolate punctures which are generally spaced less than their width apart, and with the area between the punctures covered with weak but distinct sculpturing. Propodeal lamellae broad, the dorsal margins flat to weakly convex, the posterior margins weakly concave, the angles between these margins slightly greater than 90 degrees. Sculpturing on the metapleural gland bulb uniformly reticulate-punctate. Postpetiole expanded laterally and wing-like. First gastral segment immediately posterior of the postpetiole with very short irregular rugae. Body colour uniform yellow-red.
- Holotype, worker, Black Oak Creek, Koonamore, South Australia, Australia, 25 July 1973, P.J.M. Greenslade, Australian National Insect Collection; litter.
- Heterick, B. E. 2009. A guide to the ants of South-western Australia. Records of the Western Australian Museum, Supplement 76:1-206.
- Shattuck, S. O. 2000. Genus Colobostruma. Genus Mesostruma. Genus Epopostruma. Pp. 31-67 in: Bolton, B. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 63, worker, queen described)