uatuman, Rivulus Costa [W. J. E. M.] 2004:2, Figs. 1-2 [Zootaxa No. 696; ref. 27923] Temporary pool near stream close to Rio Uatumã, rio Amazonas basin, 1°56'19.6"S, 59°59'27.30.6"W, Balbina, Estado do Amazonas, Brazil, elevation 43 meters. Holotype: UFRJ 6022. Paratypes: UFRJ 6023 (3), 6024 (2, 1 c&s). •Valid as Rivulus uatuman Costa 2004 -- (Costa 2006:157, 159 [ref. 28875] in subgenus Owiyeye, Schindler & Valdesalici 2011:109 [ref. 31382], Vermeulen 2023:109 [ref. 40177]). •Valid as Laimosemion uatuman (Costa 2004) -- (Costa 2011:240 [ref. 31655], Costa & Bragança 2013:95 [ref. 32797], Costa & Lazzarotto 2014:372 [ref. 33247], Valdesalici 2016:279 [ref. 34270]). Current status: Valid as Laimosemion uatuman (Costa 2004). Rivulidae: Rivulinae. Distribution: Temporary pools, Uatumã River drainage, Amazon River basin, northern Brazil. Habitat: freshwater.