horridus, Hypostomus Kner [R.] (ex Heckel) 1854:259, Pl. 1 (fig. 1) [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 7; ref. 2628] Forte do Principe, Rio Guaporé, Brazil. Syntypes: NMW 16325 (1, dry), 86604 (1, dry). Type catalog: Ferraris 2007:298 [ref. 29155]. Name based on Heckel ms. name; apparently Kner composed the description. On p. 9 of separate. •Valid as Hypostomus horridus Kner 1854 -- (Isbrücker 1980:24 [ref. 2303], Burgess 1989:431 [ref. 12860], Armbruster 2004:79 [ref. 27644]). •Valid as Squaliforma horrida (Kner 1854) -- (Isbrücker et al. 2001:22 [ref. 25649], Isbrücker 2001:28, 32 [ref. 25653], Isbrücker 2002:29 [ref. 27178], Weber in Reis et al. 2003:367 [ref. 27061], Ferraris 2007:298 [ref. 29155], Sarmiento et al. 2014:192 [ref. 35004]). •Valid as Aphanotorulus horridus (Kner 1854) -- (Ray & Armbruster 2016:519 [ref. 34178], DoNascimiento et al. 2017:82 [ref. 35633], Meza-Vargas et al. 2021:25 [ref. 39298]). Current status: Valid as Aphanotorulus horridus (Kner 1854). Loricariidae: Hypostominae. Distribution: South America: Amazon River basin (Bolivia, Brazil, Colombia and Peru). Habitat: freshwater.