Holcoponera striatula var. angustiloba Emery, 1911e: 41 (w.) BRAZIL (São Paulo). Neotropic.

Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Brazil: São Paulo, Ypiranga, 31.x.06 (H. Lüderwaldt). Primary type depositories: MHNG, MZSP, NHMB. Primary type specimens: CASENT0907174 [MP] 5838, MZSP0066439, MZSP0066652. Type notes: 1) Baroni Urbani, 1973b: 128, cites 1 worker syntype in NHMB. 2) Ulysséa et al., 2025: Table S2, supply the corrected collection details from the handwritten catalogues at MZSP: MP 5838, 31.x.06, Ectatomma (Holcoponera) striatulum Mayr var angustiloba n. var. Forel det. (Formic.), H. Lüderwaldt, Ypiranga, ninho com alguns cems habitantes, fora no fundamento do museu [nest with a few hundred inhabitants, outside on the grounds of the museum]. 3) Original collection information: Brazil: São Paulo (H. von Ihering).