Polyrhachis ypsilon

Distribution
This taxon was described from Singapore. It is also found in Philippines, Thailand and Borneo.

Nomenclature

 *  ypsilon. Polyrhachis ypsilon Emery, 1887a: 239 (w.) SINGAPORE. Wheeler, G.C. & Wheeler, J. 1990b: 764 (l.). Senior synonym of synacantha, victoris: Hung, 1970: 19.
 * victoris. Polyrhachis ypsilon var. victoris Santschi, 1925f: 93 (w.) INDONESIA (Sumatra). (Misspelled as vecticortis by Chapman & Capco, 1951: 304.) Junior synonym of ypsilon: Hung, 1970: 19.
 * synacantha. Polyrhachis (Polyrhachis) ypsilon ab. synacantha Santschi, 1933d: 2 (w.) BORNEO. Junior synonym of ypsilon: Hung, 1970: 19.