ubim, Laimosemion Costa [W. J. E. M.] & Lazzarotto [H.] 2014:372, Figs. 1-3 [Ichthyological Exploration of Freshwaters v. 24 (no. 4) [for 2013]; ref. 33247] Estado do Amazonas, Maraã, a stream tributary to Igarapé do Ubim, Lago Amanã system, Reserva de Desenvolvimento Sustentável Amanã, Japura-Solimões river drainage, Rio Amazonas basin, 2°29'53"S, 64°36'58"W, Brazil. Holotype: INPA 33978. Paratypes: IDSM 2296 (2); INPA 33979 (1), 33980 (8); UFRJ 8240 (6), 8241 (4). •Valid as Rivulus ubim (Costa & Lazzarotto 2014) -- (Vermeulen 2023:109 [ref. 40177]). •Valid as Laimosemion ubim Costa & Lazzarotto 2014 -- (Valdesalici 2016:279 [ref. 34270], Valdesalici & Nielsen 2017:102 [ref. 35496], Nielsen et al. 2022:42 [ref. 39106]). Current status: Valid as Laimosemion ubim Costa & Lazzarotto 2014. Rivulidae: Rivulinae. Distribution: Lago Amanã system, Central Amazon, northern Brazil. Habitat: freshwater.