Odontomachus biumbonatus Brown, 1976c: 131, fig. 22, pl. 1B (w.q.) ECUADOR, PERU, BRAZIL (Pará, Amazonas, Guaporé, São Paulo), GUYANA. Neotropic.

Primary type information: Primary type material: holotype worker. Primary type locality: Ecuador: Prov. Napo, Limoncocha and vicinity, 00°24’S, 76°36’W (H.R. Hermann no. 386 and strays, also strays by P.L. Kazan). Primary type depository: MZSP. Secondary type information: Secondary type material: >12 paratype workers, 4 paratype queens. Secondary type localities: 12 paratype workers with same data as holotype, paratype workers Peru: Dept. Huanaco, Tingo Maria vic. nest no. R-9 (W.L. Brown & W. Sherbrooke), Peru: Monson Valley, nr Tingo Maria (E.I. Schlinger & E.S. Ross), 2 paratype queens Peru: Dept. Cuzco, Quincemil, 700 m., ix.1962, at light (L. Peña), paratype workers, 1 paratype queen Brazil: Pará, Icoaraci, nr Belém, 31.viii.1962, nest no. B-21 (W.L. Brown), paratype workers Pirelli Rubber Plantation, Iriboca, nest no. B-274 (P.F. Darlington), paratype workers Utinga, nr Belém, no. B-116 (P.F. Darlington), paratype workers Canindé, Rio Gurupá (B. Malkin), paratype workers Amazonas, Ponta Negra, nr Manaus, M-156 (W.L. Brown), paratype workers High Falls on Rio Tarumá, nr Manaus, no. M-103 (W.L. Brown), paratype workers Guaporé, Madeira-Mamoré Railroad Camp 41, ca 306 km. SW Porto Velho (W.M. Mann), paratype workers São Paulo, Caraguatatuba, Reserva Florestal, 40 km. (K. Lenko), paratype queen Guyana: Kartabo, 31.viii.1920 (W.M. Wheeler). Secondary type depositories: BMNH, MCZC, MZSP. Secondary type specimens: MZSP77538 to MZSP77548, BMNH(E)1014007, CASENT0900610.