Pseudomyrmex pisinnus Ward, 1989a: 425, fig. 11 (w.) BRAZIL (São Paulo). Neotropic.

Primary type information: Primary type material: holotype worker. Primary type locality: Brazil: São Paulo, Monte Aprazivel, Faz. Bacuri (20°45’S, 49°42’W), 19.vii.1974, no. 644 (M. Dimiz). Primary type depository: MZSP. Secondary type information: Secondary type material: 4 paratype workers. Secondary type locality: same as for holotype. Secondary type depositories: LACM, MCZC, MZSP, PSWC. Secondary type specimen: MZSP0089856 (in very poor condition). Type notes: The holotype was lost in transit, and never arrived at MZSP (Ulysséa et al., 2025: 11).