Species that contain: Rhytiodus and argenteofuscus [ 3 ] records

argenteofuscus, Rhytiodus Kner [R.] 1858:79 [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 30 (no. 13); ref. 13404] Rio Negro, Brazil. No types known. Originally as argenteo-fuscus. Appeared in more detail in Kner 1859:166, Pl. 7 (fig. 16) [ref. 2631]. •Valid as Rhytiodus argenteofuscus Kner 1858 -- (Ortega & Vari 1986:12 [ref. 9708], Garavello & Britski in Reis et al. 2003:79 [ref. 27061], Barriga Salazar 2014:105 [ref. 35745], Sarmiento et al. 2014:40, 183 [ref. 35004], DoNascimiento et al. 2017:40 [ref. 35633], Silvano et al. 2020:58 [ref. 38133], Meza-Vargas et al. 2021:15 [ref. 39298]). Current status: Valid as Rhytiodus argenteofuscus Kner 1858. Anostomidae. Distribution: South America: Amazon River basin (Brazil, Ecuador, Colombia, Bolivia and Peru). Habitat: freshwater.

sagittarius, Schizodon Cope [E. D.] 1878:689 [Proceedings of the American Philosophical Society v. 17 (no. 101); ref. 945] Peruvian Amazon. Holotype (unique): ANSP 21474. Type catalog: Böhlke 1984:19 [ref. 13621]. •Synonym of Rhytiodus argenteofuscus Kner 1858 -- (Garavello & Britski in Reis et al. 2003:79 [ref. 27061]). Current status: Synonym of Rhytiodus argenteofuscus Kner 1858. Anostomidae. Habitat: freshwater.

unifasciatus, Rhytiodus argenteofuscus var. Steindachner [F.] 1915:24 [10] [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse. v. 93; ref. 4244] Mouth of River Negro, Brazil. Holotype (unique): NMW. On p. 10 of separate; also described in Steindachner 1917 [ref. 15259]. Species not listed in earlier abstract [ref. 18909]. •Synonym of Rhytiodus argenteofuscus Kner 1858 -- (Garavello & Britski in Reis et al. 2003:79 [ref. 27061]). Current status: Synonym of Rhytiodus argenteofuscus Kner 1858. Anostomidae. Habitat: freshwater.