Epopostruma lattini is known from two disjunct populations, one in southern Western Australia and the other in southern South Australia. It has been found at honey baits on trees in the evening and in leaf litter, in dry sclerophyll and mallee habitats.
This large, distinctive ant can be recognised by the distinctive head shape, the bispinose lateral postpetiolar margins, by having the area immediately above the eye angular but no toothed and in having the posterolateral margin of the postpetiole (immediately anterior of the gaster) strongly concave.
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Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
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While Epopostruma can be fairly common they are often overlooked. Workers are slow-moving and most lie motionless when disturbed. Their nests are small, with up to about 100 workers, and are found in open soil or in soil under rocks, logs or small sticks. They also nest in cracks in large rocks. When nesting in open soil they are often found near the bases of trees. Tree-trunks are clearly an important substrate for foraging workers.
Almost all species forage at night although one species is known to occasionally forage on mallee stems during the day. They are also regularly found in leaf litter. Workers have been attracted to honey baits on trees in the late evening and at night. Their elongate and specialised mandibles form a type of snap-trap which is used to captured soft-bodied prey such as Collembola.
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- lattini. Epopostruma lattini Shattuck, in Bolton, 2000: 60 (w.) AUSTRALIA.
- Holotype, worker, Goomalling, Western Australia, Australia, Lowery,B.B., ANIC32-003693, Australian National Insect Collection.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Holotype worker. TL 5.2mm, HL 1.24mm, HW 1.28mm, CI 103, MandL 0.59mm, MandI 48, SL 0.71mm, SI 55, PronW 0.72mm, ML 1.27mm.
Area immediately above the eye angular. Pronotal spines present, long. Posterior section of metanotum and dorsal surface of the propodeum forming a continuous surface. Posterior face of propodeum between bases of spines and propodeal lobes with very narrow flanges with start below the bases of the spines. Petiolar spines present, long. Anterior face of postpetiole similar in length to or shorter than the dorsal face, the two faces joined by a broad convexity; sides of postpetiole expanded laterally in the form of distinct sharp teeth or spines; their lateral margins strongly concave; posterolateral margin (immediately anterior of gaster) strongly concave. Dorsum of petiole, postpetiole and gaster with numerous long, erect hairs, those on the mesosoma with strongly bent tips, those on petiole, postpetiole and gaster either straight or weakly arched. First gastral tergite and area immediately behind attachment with gaster smooth. Body colour dark yellow-red, ventral region of head, antennae, mandibles and legs lighter, gaster darker, brown.
- Heterick, B. E. 2009. A guide to the ants of South-western Australia. Records of the Western Australian Museum, Supplement 76:1-206. PDF
- 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 60, worker described)