watwata, Hypostomus Hancock [J.] 1828:246 [Zoological Journal, London v. 4; ref. 18242] Off Berbice River, Guyana. Neotype: BMNH 1932.11.10.31. Type catalog: Ferraris 2007:262 [ref. 29155]. Neotype designated by Boeseman 1868:71 [ref. 7872]; figured in his Pl. 16 (figs. 1-2). •Valid as Plecostomus watwata (Hancock 1828) -- (Ovchynnyk 1967:40 [ref. 37559]). •Valid as Squaliforma watwata (Hancock 1828) -- (Isbrücker et al. 2001:22 [ref. 25649], Isbrücker 2001:28, 32 [ref. 25653], Isbrücker 2002:29 [ref. 27178]). •Valid as Hypostomus watwata Hancock 1828 -- (Boeseman 1968:67 [ref. 7872] with discussion, Isbrücker 1980:38 [ref. 2303], Burgess 1989:433 [ref. 12860], Galvis et al. 1997:87 [ref. 23651], González Bencomo et al. 1997:159 [ref. 24960], Le Bail et al. 2000:260 [ref. 24549], Camargo & Isaac 2001:145 [ref. 27639] as Hipostomus, Ferraris 2003:865 [ref. 26999], Weber in Reis et al. 2003:364 [ref. 27061], Armbruster 2004:80 [ref. 27644], Mundy 2005:155 [ref. 28379], Ferraris 2007:262 [ref. 29155], Weber et al. 2012:209, 211 [ref. 31999], Zawadzki et al. 2013:74 [ref. 32701], Zawadzki et al. 2015:57 [ref. 33866], Ray & Armbruster 2016:505 [ref. 34178], Marceniuk et al. 2017:39 [ref. 35324], Zawadzki et al. 2017:572 [ref. 35666], see DoNascimiento et al. 2017:[19] [ref. 35679], Provenzano-Rizzi & Lasso in Lasso & Morales-Betancourt 2022:182 [ref. 40783]). Current status: Valid as Hypostomus watwata Hancock 1828. Loricariidae: Hypostominae. Distribution: South America: Guianan river drainages from Oyapock River to Demerara River (French Guiana, Guyana, Suriname and Venezuela); introduced elsewhere. Habitat: freshwater.