longiradiatus, Plecostomus Holly [M.] 1929:118 [2] [Anzeiger der Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse v. 66 (no. 13) (for 2 May 1929); ref. 16088] Rio Guaná, assumably a tributary of the Madeira, itself a tributary of the Amazon, Brazil. Holotype: NMW (lost). Paratype: NMW (1, lost). Type catalog: Ferraris 2007:256 [ref. 29155], Bogutskaya et al. 2022:74 [ref. 39277]. On p. 2 of separate. •Valid as Hypostomus longiradiatus (Holly 1929) -- (Isbrücker 1980:26 [ref. 2303], Burgess 1989:431 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:359 [ref. 27061], Armbruster 2004:79 [ref. 27644], Ferraris 2007:256 [ref. 29155] with a holotype). Current status: Valid as Hypostomus longiradiatus (Holly 1929). Loricariidae: Hypostominae. Distribution: South America: Guamá River basin (Brazil). Habitat: freshwater.