piratatu, Hypostomus Weber [C.] 1986:987, Figs. 3-4, 5b [Revue Suisse de Zoologie v. 93 (no. 4); ref. 8023] Intermittant arm of the Río Tebicuary, Río Paraná system, Sapucái, Paraguay. Holotype: MHNG 2265.03. Paratypes: (13) MHNG 2251.32-34 (3, 1, 2), 2251.35-36 (3), 2251.37-38 (1, 2); ZMA (1). Type catalog: Weber 1998:10 [ref. 32707], Ferraris 2007:258 [ref. 29155]. •Valid as Hypostomus piratatu Weber 1986 -- (Burgess & Finley 1996:169 [ref. 22901], Gómez & Chebez 1996:64 [ref. 23791], Britski et al. 1998:135 [ref. 24147], Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:361 [ref. 27061], López et al. 2003:51 [ref. 27366], Armbruster 2004:79 [ref. 27644], Menni 2004:81 [ref. 28131], Ferraris 2007:258 [ref. 29155], Zawadzki et al. 2010:719 [ref. 31074], Zawadzki et al. 2014:103 [ref. 33233], Mirande & Koerber 2015:43 [ref. 35117], Cardoso et al. 2016:22 [ref. 34373], Koerber et al. 2017:62 [ref. 35267], Zawadzki et al. 2017:571 [ref. 35666], Zawadzki et al. 2018:[16] [ref. 35944], Zawadzki et al. 2019:[11] [ref. 37170], Zawadzki et al. 2021:110 [ref. 38157]). Current status: Valid as Hypostomus piratatu Weber 1986. Loricariidae: Hypostominae. Distribution: Eastern Paraguay River tributaries and upper Paraná River basin: Argentina and Paraguay. Habitat: freshwater.