nanus, Tetragonopterus Lütken [C. F.] (ex Reinhardt) 1875:133 [7] [Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger og dets Medlemmers Arbeider (Kjøbenhavn) 1874 (no. 3); ref. 2856] Lagoa Santa, 19°38'S, 43°53'W, Minas Gerais State, Brazil. Syntypes: USNM 44958 (4) from Lütken; MNHN 0000-9584 [ex ZMUC] (5); SMNS 2048 (5, lost); ZMB 9202 (5, poor condition); ZMUC 664-678 (15), 900-916 (17). Type catalog: Bertin 1948:22 [ref. 19577], Nielsen 1974:46 [ref. 9588], Vari & Howe 1991:40 [ref. 19022], Fricke 1995:9 [ref. 28100], Fricke 2005:26 [ref. 29864]. On p. 7 of separate. Also described in Lütken 1875:218 (and p. XIV of summary), Pl. 5 (fig. 17) [ref. 19674]. Authorship sometimes seen as Reinhardt in Lütken. •Valid as Hasemania nana (Lütken 1875) -- (Zarske & Géry 1999:95 [ref. 23982], Lima & Gerhard 2001:112 [ref. 25355], Britski 2001:21 [ref. 26046], Pavanelli in Reis et al. 2003:129 [ref. 27061], Bertaco & Malabarba 2007:350 [ref. 29142], Zanata & Serra 2010:21 [ref. 30751], Mirande 2010:512 [ref. 31006], Serra & Langeani 2015:485 [ref. 33944], Silva et al. 2020:6 [ref. 37809], Quintela et al. 2023:6 [ref. 40727]). Current status: Valid as Hasemania nana (Lütken 1875). Acestrorhamphidae: Stichonodontinae. Distribution: South America: São Francisco River basin (Minas Gerais and Bahia, Brazil). Habitat: freshwater.