trimaculatus, Oxydoras Boulenger [G. A.] 1898:422, Pl. 40 (fig. 1) [Transactions of the Zoological Society of London v. 14 (pt 7, no. 2); ref. 543] Rio Juruá, Brazil. Syntypes: BMNH 1897.12.1.41-43 (3). Type catalog: Ferraris 2007:174 [ref. 29155]. •Valid as Opsodoras trimaculatus (Boulenger 1898) -- (Burgess 1989:222 [ref. 12860], Chang & Ortega 1995:3 [ref. 24302]). •Valid as Nemadoras trimaculatus (Boulenger 1898) -- (Sabaj & Ferraris in Reis et al. 2003:463 [ref. 27061], Ferraris 2007:174 [ref. 29155], Barriga Salazar 2014:115 [ref. 35745], Sabaj Pérez et al. 2014:155 [ref. 33303], DoNascimiento 2016:531 [ref. 34727], Lasso & Taphorn in Lasso & Morales-Betancourt 2022:158 [ref. 40783], Taphorn et al. 2022:47 [ref. 41297]). •Valid as Tenellus trimaculatus (Boulenger 1898) -- (Birindelli 2014:538 [ref. 33501] in Doradinae, Birindelli 2014:xx [ref. 33501], DoNascimiento et al. 2017:89 [ref. 35633], Silvano et al. 2020:237 [ref. 38135], Meza-Vargas et al. 2021:22 [ref. 39298]). Current status: Valid as Tenellus trimaculatus (Boulenger 1898). Doradidae: Doradinae. Distribution: South America: Amazon, Orinoco and Essequibo River basins (Brazil, Colombia, Ecuador, Guyana, Peru and Venezuela). Habitat: freshwater.