arrigonis, Leuciscus Steindachner [F.] 1866:67 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftlichen Classe v. 3; ref. 21715] Lake Uña and Júcar River near Cuenca, Spain. Syntypes: (several) NMW 52161-232 (316 spec., 71 lots), 53409 (5). Species first described in the above abstract, later illustrated and described in more detail in Steindachner 1866:16 [p. 11 of separate], Pl. 4 [ref. 18776]. Also in Steindachner 1866:8, 9 [ref. 18757]. •Synonym of Chondrostoma toxostoma (Vallot 1837), but a valid subspecies -- (Elvira 1987:131 [ref. 6743], Lelek 1987:181 [ref. 22962], Elvira 1991:149 [ref. 20036]). •Valid as Chondrostoma arrigonis (Steindachner 1866) -- (Kottelat 1997:54 [ref. 22952], Doadrio & Carmona 2003:30 [ref. 28132], Coelho et al. 2005:202 [ref. 28430], Gante et al. 2010:968 [ref. 35176], Çiftci et al. 2020:214 [ref. 37725]). •Valid as Parachondrostoma arrigonis (Steindachner 1866) -- (Robalo et al. 2007:371 [ref. 28878], Doadrio & Elvira 2007:296 [ref. 29510], Kottelat & Freyhof 2007:211 [ref. 29996], Perea et al. 2010:15 [ref. 31802]). Current status: Valid as Parachondrostoma arrigonis (Steindachner 1866). Leuciscidae: Leuciscinae. Distribution: Southwestern Europe: Spain. Habitat: freshwater.