Species that contain: Plecostomus and laplatae [ 4 ] records

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.

laplatae, Plecostomus Eigenmann [C. H.] 1907:450, Pl. 21 (figs. 1-3) [Proceedings of the Washington Academy of Sciences v. 8 (for 1906); ref. 10024] Buenos Aires [Ensenada, Buenos Aires Province], Argentina. Holotype: Princeton Univ. Paratype: CAS 77342 [ex IU 11351] (1). Type catalog: Ferraris 2007:255 [ref. 29155]. Type locality see Calviño & Waldbillig 2020:1 [ref. 37512]. •Valid as Hypostomus laplatae (Eigenmann 1907) -- (Isbrücker 1980:25 [ref. 2303], Burgess 1989:431 [ref. 12860], López & Miquelarena 1991:28 [ref. 23548], Isbrücker 2001:28, 31 [ref. 25653], López et al. 2002:60 [ref. 26808], Isbrücker 2002:19 [ref. 27178], López et al. 2003:51 [ref. 27366], Weber in Reis et al. 2003:359 [ref. 27061], Armbruster 2004:79 [ref. 27644], Menni 2004:81 [ref. 28131], Ferraris 2007:255 [ref. 29155], Zawadzki et al. 2010:724 [ref. 31074], Zawadzki et al. 2014:103 [ref. 33233], Martins et al. 2014:7 [ref. 33617], Litz & Koerber 2014:25 [ref. 33622], Mirande & Koerber 2015:42 [ref. 35117], Cardoso et al. 2016:22 [ref. 34373], Nión et al. 2016:32 [ref. 35565], Cardoso et al. 2019:[16] [ref. 36685], Zawadzki et al. 2019:[11] [ref. 37170], Calviño & Waldbillig 2020:1 [ref. 37512], Zawadzki et al. 2021:110 [ref. 38157], Loureiro et al. 2023:109 [ref. 40506]). Current status: Valid as Hypostomus laplatae (Eigenmann 1907). Loricariidae: Hypostominae. Distribution: South America: La Plata River basin and lower Paraná River (Argentina and Uruguay). Habitat: freshwater.

rachovii, Plecostomus Regan [C. T.] 1913:555 [Annals and Magazine of Natural History (Series 8) v. 12 (no. 72); ref. 18903] Near Rio de Janeiro, Brazil. Holotype (unique): BMNH 1913.10.30.15. Type catalog: Ferraris 2007:255 [ref. 29155]. •Valid as Hypostomus rachovii (Regan 1913) -- (Isbrücker 1980:32 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Armbruster 2004:80 [ref. 27644]). •Synonym of Hypostomus laplatae (Eigenmann 1907) -- (Weber in Reis et al. 2003:359 [ref. 27061], Ferraris 2007:255 [ref. 29155], Litz & Koerber 2014:25 [ref. 33622], Mirande & Koerber 2015:42 [ref. 35117]). •Possibly a synonym of Hypostomus punctatus Valenciennes 1840 -- (Cardoso et al. 2019:[18] [ref. 36685]). Current status: Synonym of Hypostomus punctatus Valenciennes 1840. Loricariidae: Hypostominae. Habitat: freshwater.

taeniatus, Plecostomus Regan [C. T.] 1908:358 [Annals and Magazine of Natural History (Series 8) v. 2 (no. 10); ref. 14352] Río La Plata, Argentina. Syntypes: BMNH 1908.8.29.17 [ex ZMB] (1), ZMB 16817 (1). Type catalog: Ferraris 2007:255 [ref. 29155]. •Valid as Hypostomus taeniatus (Regan 1908) -- (Isbrücker 1980:35 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178]). •Synonym of Hypostomus laplatae (Eigenmann 1907) -- (López & Miquelarena 1991:29 [ref. 23548], Weber in Reis et al. 2003:359 [ref. 27061], Armbruster 2004:80 [ref. 27644], Ferraris 2007:255 [ref. 29155], Litz & Koerber 2014:25 [ref. 33622], Mirande & Koerber 2015:42 [ref. 35117], Cardoso et al. 2019:[17] [ref. 36685], Zawadzki et al. 2019:[11] [ref. 37170]). Current status: Synonym of Hypostomus laplatae (Eigenmann 1907). Loricariidae: Hypostominae. Habitat: freshwater.