Pheidole obtusopilosa st. heterothrix Santschi, 1923d: 59 (s.w.) ARGENTINA (Entre Ríos). Neotropic.

Primary type information: Primary type material: syntype major workers, syntype minor workers (numbers not stated). Primary type locality: Argentina: Entre Rios, Villaguay (C. Bruch). Primary type depository: NHMB. Type notes: Wilson, 2003a: 436, says specimens were “Compared with lectotype and paralectotype of Pheidole heterothrix”, but no lectotype designation for Pheidole heterothrix has been detected in the literature.