xeruini, Tyttobrycon Géry [J.] 1973:126, Figs. 27-30 [Studies on the Neotropical Fauna v. 8; ref. 1596] Middle Rio Negro basin, Rio Novo, tributary of Rio Xeruini, Brazil. Holotype: MHNG 2229.10 [ex Géry coll. 0695]. Paratypes: (6) ANSP 139718 (1), ZMA 113847 (2). Type catalog: Nijssen et al. 1982:25 [ref. 19236], Böhlke 1984:56 [ref. 13621], Weber 1998:9 [ref. 32707]. •Valid as Tyttobrycon xeruini Géry 1973 -- (Malabarba in Reis et al. 2003:159 [ref. 27061], Marinho et al. 2013:739 [ref. 33025], DoNascimiento et al. 2017:53 [ref. 35633], Abrahão et al. 2019:18 [ref. 37182], Marinho 2024:284 [ref. 40817]). Current status: Valid as Tyttobrycon xeruini Géry 1973. Characidae: Stethaprioninae. Distribution: South America: Negro River basin, Brazil and Colombia. Habitat: freshwater.