Camponotus postcornutus Clark Worker. HW 2.0 - 4.9; HL 1.9 - 4.2; PW 1.7 - 3.2. Red brown, gaster darker; glossy; posterior corners of head in larger workers taper rearward into blunt protuberances; mesosoma dorsum evenly convex; angle rounded; front and under head, mesosoma, petiole, gaster and coxae with sparse reddish, long erect setae; polymorphic. Major worker. Medial section of anterior clypeal margin mostly straight, feebly projecting anteriorly with broad lateral angles, carina distinct; node summit moderately sharp. Minor worker. Anterior clypeal margin projecting feebly, clypeal carina sharp; PD / D about 2; node summit bluntly rounded.

Published as part of McArthur, A. J., 2007, A key to Camponotus Mayr of Australia., pp. 290-351 in Memoirs of the American Entomological Institute 80 on page 310