Species that contain: Hypostomus and emarginatus [ 3 ] records

annae, Plecostomus Steindachner [F.] 1881:112 [12], Pl. 3 (figs. 2-2a) [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 43; ref. 14290] Guamá River basin, Pará State, Brazil. Holotype (unique): NMW 44073. Type catalog: Ferraris 2007:297 [ref. 29155]. On p. 12 of separate. Mistakenly listed as Chaetostomus annae in figure caption (p. 146 [46]). •Valid as Hypostomus annae (Steindachner 1881) -- (Isbrücker 1980:19 [ref. 2303], Burgess 1989:430 [ref. 12860], Armbruster 2004:79 [ref. 27644] dated 1882). •Valid as Squaliforma annae (Steindachner 1881) -- (Isbrücker et al. 2001:22 [ref. 25649], Isbrücker 2001:31, 32 [ref. 25653], Isbrücker 2001:32 [ref. 25653], Isbrücker 2002:29 [ref. 27178], Weber in Reis et al. 2003:367 [ref. 27061], Ferraris 2007:297 [ref. 29155]). •Synonym of Aphanotorulus emarginatus (Valenciennes 1840) -- (Ray & Armbruster 2016:512 [ref. 34178]). Current status: Synonym of Aphanotorulus emarginatus (Valenciennes 1840). Loricariidae: Hypostominae. Habitat: freshwater.

emarginatus, Hypostomus Valenciennes [A.] in Cuvier & Valenciennes 1840:500 [Histoire naturelle des poissons v. 15; ref. 1008] Probably from Brazil. Holotype (unique): MNHN A-9447 (dry). Type catalog: Bertin & Estève 1950:70 [ref. 19575], Ferraris 2007:297 [ref. 29155]. •Valid as Plecostomus emarginatus (Valenciennes 1840) -- (Ovchynnyk 1967:40 [ref. 37559]). •Valid as Hypostomus emarginatus Valenciennes 1840 -- (Isbrücker 1980:23 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:431 [ref. 12860], Montoya-Burgos et al. 1998:367 [ref. 23850]). •Valid as Squaliforma emarginata (Valenciennes 1840) -- (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], Armbruster 2004:79 [ref. 27644], Ferraris 2007:297 [ref. 29155], Barriga Salazar 2014:113 [ref. 35745], Sarmiento et al. 2014:192 [ref. 35004], Zawadzki et al. 2015:57 [ref. 33866], DoNascimiento 2016:533 [ref. 34727], Careaga et al. 2020:78 [ref. 37774]). •Valid as Aphanotorulus emarginatus (Valenciennes 1840) -- (Ray & Armbruster 2016:512 [ref. 34178], Oliveira et al. 2017:[7] [ref. 35225], DoNascimiento et al. 2017:81 [ref. 35633], Urbano-Bonilla et al. 2018:76 [ref. 35773], Silvano et al. 2020:248 [ref. 38135], Meza-Vargas et al. 2021:25 [ref. 39298], Koerber et al. 2022:52 [ref. 39235]). Current status: Valid as Aphanotorulus emarginatus (Valenciennes 1840). Loricariidae: Hypostominae. Distribution: South America: upper Orinoco River, Essequibo River and eastern Amazon River basins (Brazil and Peru). Habitat: freshwater.

squalinum, Hypostoma Jardine [W.] in Schomburgk 1841:142, Pls. 2-3 [The Natural history of fishes of Guiana; ref. 18707] Rio Branco, Rio Negro, and Essequibo River, South America. Holotype (unique): whereabouts unknown. Type catalog: Ferraris 2007:298 [ref. 29155]. •Valid as Hypostomus squalinus Jardine & Schomburgk 1841 -- (Isbrücker 1980:34 [ref. 2303], Burgess 1989:432 [ref. 12860], Armbruster 2004:80 [ref. 27644] with author as Schomburgk). •Valid as Squaliforma squalina (Jardine & Schomburgk 1841) -- (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] with author correctly as Jardine, Weber et al. 2012:219 [ref. 31999], DoNascimiento 2016:533 [ref. 34727]). •Synonym of Aphanotorulus emarginatus (Valenciennes 1840) -- (Ray & Armbruster 2016:512 [ref. 34178], see DoNascimiento et al. 2017:[19] [ref. 35679]). Current status: Synonym of Aphanotorulus emarginatus (Valenciennes 1840). Loricariidae: Hypostominae. Habitat: freshwater.