marmorescens, Chaetostoma Eigenmann [C. H.] & Allen [W. R.] 1942:193 [Fishes of western South America; ref. 1246] Huanacachupa Creek near Huanuco, River Tingo, Peru, elevation 6000 feet. Holotype: IU 15403 (largest specimen) not at CAS. Paratypes: [none found at CAS in 1997] IU 15403 ("many"), IU 15402 (3). Type catalog: Ferraris 2007:229 [ref. 29155]. •Valid as Chaetostoma marmorescens Eigenmann & Allen 1942 -- (Isbrücker 1980:62 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:436 [ref. 12860], Isbrücker 2001:26 [ref. 25653], Isbrücker 2002:13 [ref. 27178], Fisch-Muller in Reis et al. 2003:381 [ref. 27061], Salcedo 2006:63 [ref. 28542], Salcedo 2006:218 [ref. 28842], Salcedo 2006:218 [ref. 28842], Ferraris 2007:229 [ref. 29155], Barriga Salazar 2014:113 [ref. 35745], Lujan et al. 2015:666 [ref. 33975], Meza-Vargas et al. 2024:1388 [ref. 41639]). Current status: Valid as Chaetostoma marmorescens Eigenmann & Allen 1942. Loricariidae: Hypostominae. Distribution: South America: Huallaga River drainage, Ecuador and Peru. Habitat: freshwater.