affinis, Parodon Steindachner [F.] 1879:32 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 16 (no. 4); ref. 20480] La Plata, Province of Buenos Aires, Argentina. Syntypes: (several) whereabouts unknown. Species later illustrated and described in more detail in Steindachner 1879:20, Pl. 3 (fig. 3) [ref. 4228]. •Valid as Apareiodon affinis (Steindachner 1879) -- (Garavello 1977:452 [ref. 7250], Starnes & Schindler 1993:755 [ref. 21014], Gómez & Chebez 1996:54 [ref. 23791], Sverlij et al. 1998:31 [ref. 27632], Britski et al. 1999:70 [ref. 24147], Bonilla et al. 1999:1 [ref. 25109], Pavanelli in Reis et al. 2003:46 [ref. 27061] with a holotype, López et al. 2003:10 [ref. 27366], Menni 2004:72 [ref. 28131], Pavanelli 2006:89 [ref. 28544], Litz & Koerber 2014:7 [ref. 33622], Sarmiento et al. 2014:186 [ref. 35004], Mirande & Koerber 2015:11 [ref. 35117], Bertaco et al. 2016:415 [ref. 34561], Nión et al. 2016:27 [ref. 35565], Koerber et al. 2017:12 [ref. 35267], Azevedo-Santos et al. 2020:5 [ref. 39606], Reis et al. 2020:462 [ref. 38364], Brandão et al. 2023:131 [ref. 40464], Loureiro et al. 2023:40 [ref. 40506]). Current status: Valid as Apareiodon affinis (Steindachner 1879). Parodontidae. Distribution: South America: La Plata River basin (Argentina, Brazil, Bolivia, Paraguay and Uruguay). Habitat: freshwater.