Tetramorium impressum

Tetramorium impressum is common in newly rehabilitated sand mines in WA (pers. obs.; also mentioned but not named in Bisevac and Majer 1999) where it may collect seeds of grasses or herbs. This species is much less abundant in sites representing later successional stages. (Heterick 2009)

Identification
Heterick (2009) - Tetramorium impressum probably should be regarded as a species complex. Workers with black foreparts, yellow gaster and deeply impressed striae may well be genetically distinct from those that are reddish and more finely striate. However, the sculpture and shape of the node are identical in the two groups. Both forms also key out at ''T. impressum using Bolton’s (1977) taxonomic key to Australian Tetramorium'' species. All are widespread throughout the SWBP, WA.

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Nomenclature

 *  impressum. Xiphomyrmex impressus Viehmeyer, 1925a: 30 (w.) AUSTRALIA. Combination in Tetramorium: Bolton, 1977: 138.