Polyrhachis (Polyrhachis) ypsilon Emery, 1887

Material examined. None available.

Material not physically examined. Lectotype – CASENT0905548, ANTC26437 (MSNG).

Literature. Type – Emery (1887). Hung (1970) [designation of lectotypes, paralectotypes]; Kohout (1998); Kohout (2014).

Localities. Unknown.

Habitat/Ecology. Unknown in the Singapore context.

Remarks. Type locality in Singapore. At the time of writing, the only record of this species in Singapore is that of its type series, collected in 1875 by D’Albertis (Emery 1887).