Pheidole fallax subsp. obscurithorax Naves, 1985: 61 (s.w.) ARGENTINA (Córdoba, Formosa). Neotropic.

Primary type information: Primary type material: lectotype major worker (by designation of Wilson, 2003a: 331). Primary type locality: lectotype Argentina: Córdoba, Alta Gracia (C. Bruch). Primary type depository: NHMB. Primary type specimen: CASENT0913311 (lectotype). Secondary type information: Secondary type material: 1 paralectotype minor worker. Secondary type locality: same as for lectotype. Secondary type depository: NHMB. Type notes: Other original syntype localities: Argentina: Córdoba, Tantaviego (Durione), Argentina: Formosa (P. Joergensen).