Brachymyrmex constrictus st. bonariensis Santschi, 1933f: 122, figs. 20, 21 (w.) ARGENTINA (Buenos Aires). Neotropic.

Primary type information: Primary type material: lectotype worker (by designation of Ortiz-Sepúlveda et al., 2019: 474). Primary type locality: lectotype Argentina: Buenos Aires (C. Bruch). Primary type depository: NHMB. Secondary type information: Secondary type material: 1 paralectotype worker. Secondary type locality: same as for lectotype. Secondary type depository: NHMB. Type notes: Original description cites 2 worker syntypes.