wallacei, Tetranematichthys Vari [R. P.] & Ferraris [C. J., Jr.] 2006:169, Figs. 1A, 2, 4 [Copeia 2006 (no. 2); ref. 28680] Upper Rio Negro, São Pedro, mouth of Igarapé do Ibará, about 0°15'S, 66°46'W, Amazonas, Brazil. Holotype: MZUSP 31096. Paratypes: AMNH 74444 (2), 163022 (1); MCNG 23086 (2); MZUSP 59048 (3); USNM 269994 (1), 269995 (1), 270008 (1). Plus non-type material. •Valid as Tetranematichthys wallacei Vari & Ferraris 2006 -- (Ferraris 2007:444 [ref. 29155], Peixoto & Wosiaki 2010:69 [ref. 30757], DoNascimiento et al. 2017:87 [ref. 35633], Calegari et al. 2019:[97] [ref. 36961], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Tetranematichthys wallacei Vari & Ferraris 2006. Auchenipteridae: Auchenipterinae. Distribution: South America: Amazon and Orinoco River basins (Brazil, Colombia, Peru and Venezuela). Habitat: freshwater.