Eciton (Acamatus) orthonotum Borgmeier, 1933d: 165 (w.) BRAZIL (Rio de Janeiro). Neotropic.

Primary type information: Primary type material: syntype workers (number not stated, “several”). Primary type locality: Brazil: Rio de Janeiro, Mendes, ix.1933, no. 52 (H. Eidmann). Primary type depositories: IBVR, MHNG, MSNG, MZSP, NHMB. Type notes: Baroni Urbani, 1977e: 70, cites 2 worker syntypes in NHMB.