geayi, Tetragonopterus (Markiana) nigripinnis Pellegrin [J.] 1909:347 [6] [Bulletin du Muséum National d'Histoire Naturelle (Série 1) v. 14 (no. 7)[1908]; ref. 3423] Río Apure, Orinoco System, Venezuela. Holotype (unique): MNHN 1898-0017. On p. 6 of separate. •Valid as Markiana geayi (Pellegrin 1909) -- (Taphorn 1992:248 [ref. 23654], Zarske & Géry 2002:13 [ref. 26554], Pavanelli in Reis et al. 2003:144 [ref. 27061], Baicere-Silva et al. 2011:372 [ref. 31394], Thomaz et al. 2015:Add. 5 [ref. 33893], DoNascimiento et al. 2017:54 [ref. 35633], Urbano-Bonilla et al. 2018:88 [ref. 35773], Cortés Hernández et al. 2023:455 [ref. 40760], Taphorn et al. 2022:17 [ref. 41297]). Current status: Valid as Markiana geayi (Pellegrin 1909). Stevardiidae: Landoninae. Distribution: South America: Orinoco River basin (Guyana, Venezuela and Colombia). Habitat: freshwater.