commersonoides, Plecostomus Marini [T. L.], Nichols [J. T.] & LaMonte [F. R.] 1933:3 [American Museum Novitates No. 618; ref. 2889] Dársena Norte, Buenos Aires, Argentina. Holotype: AMNH 12243. Paratypes: AMNH 12244 (1). Type catalog: Ferraris 2007:255 [ref. 29155]. •Valid as Plecostomus commersonoides Marini, Nichols & LaMonte 1933 -- (Isbrücker 1980:22 [ref. 2303], Burgess 1989:431 [ref. 12860]). •Valid as Hypostomus commersonoides (Marini, Nichols & LaMonte 1933) -- (Isbrücker 2001:31 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Armbruster 2004:79 [ref. 27644]). •Synonym of Hypostomus laplatae (Eigenmann 1907) -- (López & Miquelarena 1991:29 [ref. 23548], Weber in Reis et al. 2003:359 [ref. 27061], Ferraris 2007:255 [ref. 29155], Mirande & Koerber 2015:42 [ref. 35117], Cardoso et al. 2019:[17] [ref. 36685]). Current status: Synonym of Hypostomus laplatae (Eigenmann 1907). Loricariidae: Hypostominae. Habitat: freshwater.