uakti, Rivulus Costa [W. J. E. M.] 2004:2, Figs. 1-2 [Zootaxa No. 465; ref. 27570] Stream near igarapé Iá, kilometer 9.4 of road São Gabriel da Cachoeira to Cucuí, upper rio Negro drainage, rio Amazonal basin, São Gabriel da Cachoeira, Estado Amazonas, northern Brazil, 0°03'51.1"S, 66°59'46.9"W, elevation 99 meters. Holotype: UFRJ 5925. Paratypes: MCP 34858 (2); UFRJ 5926 (36), 5927 (4, 2 c&s). •Valid as Rivulus uakti Costa 2004 -- (Costa 2004:11 [ref. 27656], Hrbek et al. 2004:575 [ref. 27910], Costa 2004:2 [ref. 27923], Costa 2006:157, 159 [ref. 28875] in subgenus Owiyeye, Schindler & Valdesalici 2011:109 [ref. 31382], Vermeulen et al. 2013:191 [ref. 32954]). •Valid as Laimosemion uakti (Costa 2004) -- (Costa 2011:240 [ref. 31655], Costa & Bragança 2013:93 [ref. 32697], Costa & Lazzarotto 2014:372 [ref. 33247], Valdesalici 2016:279 [ref. 34270]). Current status: Valid as Laimosemion uakti (Costa 2004). Rivulidae: Rivulinae. Distribution: Upper Negro River basin, Amazon River basin, northern Brazil. Habitat: freshwater.