Myrmelachista arthuri var. brunneiceps Forel, 1908: 397 (w.) BRAZIL (São Paulo). Neotropic.

Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Brazil: São Paulo, Ypiranga, 8.x.1906 (H. Lüderwaldt). Primary type depositories: MHNG, MZSP. Primary type specimens: CASENT0909914 MP 5587, MZSP0083651, MZSP0083652, MZSP0083653, MZSP0083654, MZSP0083655, MZSP0083656, MZSP0083657, MZSP0083658. Type notes: 1) Ulysséa et al., 2025: Table S2, supply the corrected collection details from the handwritten catalogues at MZSP: MP 5587, 8.x.1906, Myrmelachista arthuri For. var. brunneiceps n. var. (Formicid.), H. Lüderwaldt, Ypiranga, mato governo, abundante no tronco de uma árvore cortada, Forel det. Public! 2) Original collection information: Brazil: São Paulo (H. von Ihering).