Xiphomyrmex costatus Emery, 1897 an obsolete combination of Tetramorium costatus (Emery, 1897)
Xiphomyrmex costatus Emery, 1897c: 587, pl. 15, fig. 26 (w.) NEW GUINEA (Papua New Guinea). Australasia.
Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Papua New Guinea: nr Berlinhafen (= Aitepe) (L. Biró). Primary type depositories: HNHM, MSNG.
Citations

Extant: 0 valid subspecies (3 obsolete combinations)