triplax, Acestridium Rodriguez [M. S.] & Reis [R. E.] 2007:429, Figs. 1, 2A, 3A, 4A [Neotropical Ichthyology v. 5 (no. 4); ref. 29464] Municipio de Juruti, igarapé Mutum, tributary to rio Aruã, a tributary to rio Branco, a tributary. to rio Aripiuns, itself a tributary to the lower rio Tapajós, 2°36'45"S, 56°11'37"W, Pará State, Brazil. Holotype: MPEG 13355. Paratypes: many at AMNH, MCP, MPEG. •Valid as Acestridium triplax Rodriguez & Reis 2007 -- (Reis & Lehmann A. 2009:451 [ref. 30379], Rodriguez et al. 2015:325 [ref. 33908], Delapieve et al. 2018:21 [ref. 35713]). Current status: Valid as Acestridium triplax Rodriguez & Reis 2007. Loricariidae: Hypoptopomatinae. Distribution: Lower Tapajós drainage, Pará, Brazil. Habitat: freshwater.