dlouhyi, Hypostomus Weber [C.] 1985:956, Figs. 1-5 [Revue Suisse de Zoologie v. 92 (no. 4); ref. 8128] Lake in arm of Río Yguazú, River Paraná system, 25°25'30"S, 55°20'W, Paraguay. Holotype: MHNG 2229.43. Paratypes: (14) CAS 60262 [ex MHNG 2229.44] (1); CFAP; MCZ 65044 [ex MHNG 2229.44] (1); MHNG; ZMA. Type catalog: Weber 1998:9 [ref. 32707], Ferraris 2007:253 [ref. 29155]. •Valid as Hypostomus dlouhyi Weber 1995 -- (Zawadzki et al. 2014:103 [ref. 33233], Martins et al. 2014:7 [ref. 33617], Cardoso et al. 2016:22 [ref. 34373], Koerber et al. 2017:61 [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 dlouhyi Weber 1985. Loricariidae: Hypostominae. Distribution: Yguazú River drainage, middle Paraná River basin, Paraguay. Habitat: freshwater.