caucasicus, Nemachilus barbatulus var. Berg [L. S.] 1898:67 [26] [Izvestija Kavkazskago Muzeja = Mitteilungen des Kaukasischen Museums = Bulletin du Musée du Caucase v. 1 (no. 3); ref. 20653] Argun River, Terek River basin, Russia. Syntypes: (many). Original genus is correctly Nemacheilus. On p. 26 of Russian issue. •Synonym of Nemacheilus barbatulus (Linnaeus 1758), but a valid subspecies as described -- (Berg 1949:872 [ref. 20661] as Nemachilus, Lelek 1987:256 [ref. 22962] as Noemacheilus). •Synonym of Barbatula barbatula (Linnaeus 1758), but a valid subspecies -- (Reshetnikov et al. 1997:743 [ref. 24702], Vasil'eva 1998:95 [ref. 23591], Gabrielyan 2001:28 [ref. 25867], Ninua & Japoshvili 2008:167 [ref. 31251], Kottelat 2012:77 [ref. 32367] with question, Parin et al. 2014:103 [ref. 33547] with question). Current status: Synonym of Barbatula barbatula (Linnaeus 1758). Nemacheilidae. Habitat: freshwater, brackish.