Myrmecia chasei

Identification
Heterick (2009) - Myrmecia chasei and Myrmecia ludlowi have the same coloration as Myrmecia elegans, but are more robust ants with hairy tibiae. The separation of the two species by Ogata and Taylor (1991) is based purely on the colour of the mandibles (yellow in chasei, dark brown in ludlowi), but specimens seen by this author are not so easily distinguished, many having intermediate light to medium brown mandibles. Both species (if indeed they are separable species) are found in the Darling Range, including the Perth area.

Distribution based on Regional Taxon Lists
Australasian Region: Australia.

Castes
Queen-worker difference in body size appears to be larger in M. chasei than in other species of Myrmecia. Queens are 22-24 millimetres long, while workers are 12-15.5 millimetres long.

Nomenclature

 *  chasei. Myrmecia chasei Forel, 1894e: 235 (w.) AUSTRALIA. Clark, 1943: 116 (q.m.); Wheeler, G.C. & Wheeler, J. 1971d: 247 (l.). Combination in Promyrmecia: Clark, 1943: 115; in Myrmecia: Taylor & Brown, D.R. 1985: 7. Senior synonym of mediorubra: Clark, 1943: 115. See also: Clark, 1951: 212.
 * mediorubra. Myrmecia pilosula subsp. mediorubra Forel, 1910b: 7 (w.) AUSTRALIA. Wheeler, W.M. 1933i: 59 (w.). Combination in M. (Promyrmecia): Wheeler, W.M. 1933i: 58. Raised to species: Wheeler, W.M. 1933i: 58. Junior synonym of chasei: Clark, 1943: 115.