quadrifilis, Ageneiosus Kner [R.] 1858:442 [72], Pl. 9 (fig. 29) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 26 (s. 373); ref. 2630] Rio Guaporé, Brazil. Holotype (unique): NMW 43343. Type catalog: Ferraris 2007:78 [ref. 29155]. On p. 72 of separate. •Valid as Tetranematichthys quadrifilis (Kner 1858) -- (Burgess 1989:286 [ref. 12860], de Pinna 1998:311 [ref. 23847], Ferraris in Reis et al. 2003:477 [ref. 27061], Schraml 2005:22 [ref. 28585], Vari & Ferraris 2006:177 [ref. 28680] with redefined range, Ferraris 2007:78 [ref. 29155], Peixoto & Wosiaki 2010:69 [ref. 30757], Birindelli 2014:535 [ref. 33501], Sarmiento et al. 2014:190 [ref. 35004], DoNascimiento 2016:539 [ref. 34727], see DoNascimiento et al. 2017:[22] [ref. 35679], Calegari et al. 2019:[97] [ref. 36961], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Tetranematichthys quadrifilis (Kner 1858). Auchenipteridae: Auchenipterinae. Distribution: South America: Guaporé River, southwestern portions of Amazon River basin (Brazil, Bolivia, Peru) and ?Venezuela. Habitat: freshwater.