Pseudomyrmex ultrix Ward, 1999b: 509, figs. 6, 17, 28, 72, 78, 98 (w.q.m.) ECUADOR. Neotropic.

Primary type information: Primary type material: holotype worker. Primary type locality: Ecuador: Napo, 13 km. NNE Archidona, 0°48’S, 77°47’W, 960 m., 7.viii.1991, #11393 (P.S. Ward). Primary type depository: MCZC. Secondary type information: Secondary type material: paratype workers, paratype queens, paratype males (numbers not stated). Secondary type locality: same as for holotype. Secondary type depositories: BMNH, IZAV, LACM, MCZC, MECN, MUSM, MZSP, PSWC, QCAZ, UCDC, UNCB.