ambrosettii, Liposarcus Holmberg [E. L.] 1893:354 [Revista del Jardin Zoológico de Buenos Ayres v. 1 (no. 12); ref. 26086] Río Paraguay, in front of Formosa. No types known. Type catalog: Ferraris 2007:291 [ref. 29155]. Incorrectly treated as a forgotten name by some authors. •Valid as Liposarcus ambrosettii Holmberg 1893 -- (Isbrücker 2001:29 [ref. 25653], Isbrücker 2002:20 [ref. 27178]). •Nomen oblitum (forgotten name) in synonymy of Liposarcus anisitsi (Eigenmann & Kennedy 1903) -- (Weber 1992:28 [ref. 19714], Weber in Reis et al. 2003:365 [ref. 27061]). •Valid as Pterygoplichthys ambrosettii (Holmberg 1893) -- (Isbrücker 1980:40 [ref. 2303], Burgess 1989:433 [ref. 12860], López & Miquelarena 1991:38 [ref. 23548], Ferraris 2007:291 [ref. 29155], Litz & Koerber 2014:26 [ref. 33622], Sarmiento et al. 2014:192 [ref. 35004], Mirande & Koerber 2015:43 [ref. 35117], Koerber et al. 2017:63 [ref. 35267], Reis et al. 2020:467 [ref. 38364], Brandão et al. 2022:179 [ref. 40464], Silva et al. 2022:[2] 435 [ref. 39571], Page et al. 2023:80 [ref. 40505], Quintela et al. 2023:6 [ref. 40727]). Current status: Valid as Pterygoplichthys ambrosettii (Holmberg 1893). Loricariidae: Hypostominae. Distribution: South America: Paraguay, middle Paraná, Bermejo, and Uruguay River basins (Argentina, Brazil, Bolivia, Paraguay and Uruguay). Invasive in upper Rio Paraná (Brazil). Habitat: freshwater.