francisci, Plecostomus Lütken [C. F.] 1874:30 [2] [Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger og dets Medlemmers Arbeider (Kjøbenhavn) 1874 (no. 1); ref. 2855] Rio São Francisco, Brazil. Holotype (unique): ZMUC 60. Type catalog: Nielsen 1974:52 [ref. 9588], Ferraris 2007:254 [ref. 29155]. On p. 2 of separate. Also described in Lütken 1875:143 (and p. II of summary) [ref. 19674]. •Valid as Hypostomus francisci (Lütken 1874) -- (Isbrücker 1980:23 [ref. 2303], Burgess 1989:431 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Britski 2001:19 [ref. 26046], Weber in Reis et al. 2003:358 [ref. 27061], López et al. 2003:50 [ref. 27366], Isbrücker 2002:18 [ref. 27178], Armbruster 2004:79 [ref. 27644], Menni 2004:81 [ref. 28131], Ferraris 2007:254 [ref. 29155], Zawadzki et al. 2012:246 [ref. 32031], Zanata et al. 2013:248 [ref. 32751], Koerber 2014:10 [ref. 33621] not in Argentina, Zanata & Pitanga 2016:231 [ref. 34535], Zawadzki et al. 2017:12 [ref. 35355], Ramos et al. 2017:8 [ref. 35396], Zawadzki et al. 2017:571 [ref. 35666], Silva et al. 2020:11 [ref. 37809], Azevedo et al. 2021:9 [ref. 38203], Zawadzki & Penido 2021:366 [ref. 38404]). Current status: Valid as Hypostomus francisci (Lütken 1874). Loricariidae: Hypostominae. Distribution: South America: São Francisco River basin, Paraná River basin (Brazil). Habitat: freshwater.