illyricus, Squalius Heckel [J. J.] & Kner [R.] 1857:195, Fig. 108 [Die Süsswasserfische der Österreichischen Monarchie; ref. 2078] Isonzo, Knin and Sign rivers, Dalmatia, Croatia. Syntypes: NMW 49313 (7), 49315 (3), 49322 (1), 49324 (1), 49331 (2), 49339-41 (1, 1, 1), . •Doubtfully valid as Leuciscus illyricus -- (Bianco & Knezevic 1987:49 [ref. 21912]). •Valid as Leuciscus ilyricus (Heckel & Kner 1857) -- (Mrakovcic et al. 1995:184 [ref. 23079], Kottelat 1997:67 [ref. 22952], Doadrio & Carmona 2006:200 [ref. 28975]). •Valid as Squalius illyricus Heckel & Kner 1857 -- (Bogutskaya 1994:617 [ref. 23569], Sanjur et al. 2003:22 [ref. 28742], Kottelat & Freyhof 2007:266 [ref. 29996], Zupančič 2008:42 [ref. 29926], Bogutskaya & Zupančič 2010:53 [ref. 30905], Zupančič et al. 2010:155 [ref. 31002], Perea et al. 2010:13 [ref. 31802], Özuluğ & Freyhof 2011:107 [ref. 31360], Ćaleta et al. 2015:93 [ref. 34877], Ćaleta et al. 2019:166 [ref. 37026], Buj et al. 2019:[16] [ref. 37174]). Current status: Valid as Squalius illyricus Heckel & Kner 1857. Leuciscidae: Leuciscinae. Distribution: Southeastern Europe: Croatia. Habitat: freshwater.