ucayalensis, Loricariichthys Regan [C. T.] 1913:282 [Annals and Magazine of Natural History (Series 8) v. 12 (no. 69); ref. 3655] Río Ucayali, Peru. Lectotype: BMNH 1913.7.30.36 (198 mm SL). Paralectotypes: BMNH 1913.7.30.37 (1). Type catalog: Ferraris 2007:271 [ref. 29155]. Lectotype selected by Isbrücker & Nijssen 1979:208 [ref. 8822]. •Valid as Loricariichthys ucayalensis Regan 1913 -- (Isbrücker 1980:129 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:445 [ref. 12860], Isbrücker et al. 2001:30 [ref. 25653], Isbrücker 2002:23 [ref. 27178], Ferraris in Reis et al. 2003:339 [ref. 27061], Ferraris 2007:271 [ref. 29155], Meza-Vargas et al. 2021:26 [ref. 39298]). Current status: Valid as Loricariichthys ucayalensis Regan 1913. Loricariidae: Loricariinae. Distribution: South America: Ucayali River basin, upper Amazon River drainage (Peru). Habitat: freshwater.