gracilis, Schizodon Kner [R.] 1858:78 [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 30 (no. 13); ref. 13404] Rio Guaporé, Amazon system, Brazil. No types known. Appeared in more detail in Kner 1859:160, Pl. 5 [not 6] [ref. 2631]. •Valid as Pseudanos gracilis (Kner 1858) -- (Taphorn 1992:57 [ref. 23654], Garavello & Britski in Reis et al. 2003:79 [ref. 27061], Sidlauskas & Santos 2005:121 [ref. 28904], Birindelli et al. 2012:55 [ref. 32125], Barriga Salazar 2014:105 [ref. 35745] as cf. gracilis, Sarmiento et al. 2014:39, 183 [ref. 35004], DoNascimiento 2016:528 [ref. 34727], Meza-Vargas et al. 2021:15 [ref. 39298]). Current status: Valid as Pseudanos gracilis (Kner 1858). Anostomidae. Distribution: South America: central Amazon basin, including Rio Negro, Rio Branco, Rio Uatumã and Rio Madeira basins (Brazil, Ecuador?, Bolivia, Peru and Venezuela). Habitat: freshwater.