Cryptocerus fossithorax Santschi, 1921h: 125, fig. 1 (s.w.) ARGENTINA (Rio Negro). Neotropic.

Primary type information: Primary type material: 1 syntype soldier, syntype workers (number not stated). Primary type locality: Argentina: Río Negro (Hildemann) (received from Bruch). Primary type depositories: MACN, MZSP, NHMB. Type notes: 1) De Andrade & Baroni Urbani, 1999: 635, cite 1 soldier, 4 worker syntypes (1w in MZSP, 1s, 3w in NHMB). 2) They also say soldiers and workers (numbers not stated) in MACN.