This species is most often found in wet sclerophyll and rainforests although in Western Australian it has been found in sandplain heath. Nests are generally in rotten wood or occasionally soil.
Shattuck (2000) - Among species in the froggatti-group australis can be recognised by the presence of a 6 (or rarely more) segmented antenna which lacks a subbasal lobe. As conceived here, this species shows considerable colour variation. This involves primarily the development of infuscation which varies from completely absent to well developed on the mesosoma, petiole and postpetiole and to a lesser extent the head and gaster. However, the variation in this character is so great that it is of little value in recognising subsets of specimens and is thus considered here to represent intraspecific variation.
Keys including this Species
- Key to Australian Colobostruma Species
- Key to Colobostruma of the southwestern Australian Botanical Province
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Beyond what is stated in the introduction at the top of this page, little is know about the biology of Colobostruma australis. Until further studies reveal more about this species we can infer that its natural history and biology should be similar to other species in this genus. In general Colobostruma can be locally common although they are often overlooked. Most species have small colonies with less than 100 workers, and workers will lie motionless when disturbed. Nests can occur in soil usually under rocks, in cracks in rocks or in rotten logs. Only a single rainforest species is known to nest arboreally. Foraging is usually on the ground at night but occasionally they are found foraging on mallee. They are also commonly found in leaf litter.
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- australis. Colobostruma australis Brown, 1959c: 4, fig. 3 (w.q.m.) AUSTRALIA. See also: Shattuck, in Bolton, 2000: 41.
- Holotype, worker, Kallista, Dandenong Range, Victoria, Australia, September 1950, J. Clark & W.L. Brown, Museum of Comparative Zoology.
- Paratype, 2 workers, Kallista, Dandenong Range, Victoria, Australia, September 1950, J. Clark & W.L. Brown, South Australian Museum.
- Paratype, 1 queen, Dorrigo, New South Wales, Australia, W. Heron, Museum of Comparative Zoology.
- Paratype, 6 workers, 3 queens, Ferntree Gully, Victoria, Australia, J. Clark and W.L. Brown, Museum of Comparative Zoology.
- Paratype, 11 workers, 1 queen, Kallista, Dandenong Range, Victoria, Australia, J. Clark, Museum of Comparative Zoology.
- Paratype, 4 workers, Moss Vale, New South Wales, Australia, T. Greaves, Museum of Comparative Zoology.
- Paratype, 2 workers, Kallista, Dandenong Range, Victoria, Australia, Queensland Museum.
- Paratype, worker(s), queen(s), male(s), Narbethong, Victoria, Australia, J.J. McAreavey.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Shattuck (2000) - TL 2.6 - 3.2, HL 0.68 - 0.76, HW 0.58 - 0.69, CI 85 - 91, ML 0.17 - 0.19, MI 22 - 26, SL 0.34 - 0.40, SI 56 - 59, PW 0.35 - 0.44, AL 0.74 - 0.89 (6 measured). Anterior region of head rounding gradually from the dorsal to lateral surfaces, not phragmotic. Ridge immediately in front of eye reduced, weakly defined. Frontal lobes and lateral margins of clypeus smooth relative to the surrounding surface of the head. Mandibles broadly triangular. Hairs absent from dorsum of head. Posterior margin of head deeply concave. Antenna with 6, or rarely more, segments. Scape elbowed and lacking a subbasal lobe. Pronotum lacking anterolateral angles. Propodeum high, its posterior face approximately the same height as the petiolar node and with broad, thin lamellae; in profile the dorsum of the mesosoma weakly convex with a weak concavity at the metanotal groove. Lateral postpetiole drawn outwards into thin flange-like wings, the wings with translucent windows along their posterior margins only. First gastral tergite smooth, superimposed with low, closely spaced carinae on the anterior one-quarter. Body colour honey yellow, generally with varying amounts of infuscation on the dorsum of the head, dorsal and lateral surfaces of the mesosoma, petiole, postpetiole and dorsum of the gaster. In extreme cases the majority of the mesosoma, petiole and postpetiole are dark red-black.
- Bolton, B. 2000. The ant tribe Dacetini. Mem. Am. Entomol. Inst. 65: 1-1028 (page 41, see also)
- Brown, W. L., Jr. 1959c. Some new species of dacetine ants. Breviora 108: 1-11 (page 4, fig. 3 worker, queen, male described)
- 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.