microcephala, Rhamdia Lütken [C. F.] (ex Reinhardt) 1874:35 [7] [Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger og dets Medlemmers Arbeider (Kjøbenhavn) 1874 (no. 1); ref. 2855] Rio das Velhas, Brazil. Syntypes: ?NMW 45825 (1); ZMUC P 29658-60 [ex 324-325 (2), 327 (1)] (3). Type catalog: Nielsen 1974:51 [ref. 9588], Ferraris 2007:202 [ref. 29155] On p. 7 of separate. Also described in Lütken 1875:177 (and p. VIII of summary), Pl. 3 (fig. 7) [ref. 19674]. •Valid as Imparfinis microcephalus (Lütken 1874) -- (Mees & Cala 1989:382 [ref. 14277], Burgess 1989:277 [ref. 12860]). •Valid as Rhamdiopsis microcephala (Lütken 1874) -- (Britski 2001:20 [ref. 26046], Bockmann & Guazzelli in Reis et al. 2003:425 [ref. 27061], Ferraris 2007:202 [ref. 29155] with author as Reinhardt, Bockmann & Castro 2010:674 [ref. 31072]). Current status: Valid as Rhamdiopsis microcephala (Lütken 1874). Heptapteridae: Heptapterinae. Distribution: Upper Paraná and São Francisco River basins, Brazil. Habitat: freshwater.