Crematogaster borneensis André, 1896

Material examined. None available.

Material not physically examined. CASENT0193115, BBB111 (BBBC).

Literature. Viehmeyer (1916), Overbeck (1924) [both as Crematogaster (Decacrema) borneensis macarangae].

Localities. Bukit Timah Hill; Central Catchment, Sime Road.

Habitat/Ecology. This species is obligately associated with Macaranga plants, specifically host species belonging to the sections Pachystemon and Pruinosae, which are commonly found in secondary forests in general. The ant-plant associations are not strictly species-specific, and C. borneensis is known to inhabit/colonize two to seven different Macaranga host species over its entire distributional range. In Singapore, the ants were found in the hollow internodes of shafts of Macaranga hypoleuca (Rchb.f. & Zoll.) Müll.Arg., and also with scale insects in Macaranga bancana (Miq.) Müll.Arg.