Eciton (Acamatus) marginatum Borgmeier, 1939: 414 (w.) COSTA RICA. Neotropic.

Primary type information: Primary type material: syntype workers (number not stated, “numerous”). Primary type locality: Costa Rica: Santa Clara Prov., Hamburg farm, 30.viii.1936 (F. Nevermann) (received from Reichensperger). Primary type depository: MZSP. Primary type specimen: MZSP0082340. Type notes: 6 cotype workers in MZSP (MZSP0082340) are in fact part of the type series (Ulysséa et al., 2025: 10). They were previously not considered as types by Esteves et al., 2011: 348.