Acromyrmex rugosus bigener Santschi, 1925 junior synonym of current valid taxon Acromyrmex rugosus (Smith, 1858)
Acromyrmex rugosus st. bigener Santschi, 1925d: 243 (w.q.m.) BRAZIL (Pará, Rio Grande do Sul). Neotropic.
Primary type information: Primary type material: syntype workers (number not stated). Primary type localities: Brazil: Pará, Monte Alegre (A. Reichensperger), Brazil: Rio Grande do Sul (H. von Ihering), Rio Grande do Sul, Neu Wurtemberg (E. Garbe). Primary type depositories: MZSP, NHMB. Primary type specimen: MZSP0083732. Type notes: Ulysséa et al., 2025: Table S1, cite 1 syntype worker in MZSP.
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