blennioides, Gobius Kessler [K. F.] 1877:12, Pl. 1 (fig. 4) [The Aralo-Caspian Expedition; ref. 2597] Baku Bay, Caspian Sea, Azerbaijan, depth 42 feet [6 Russian fathoms]. Holotype (unique): ZIN 10903. •Synonym of Proterorhinus marmoratus (Pallas 1814) -- (Berg 1949:1100 [ref. 20662], Miller 1973:511 [ref. 6888], Coad 1995:31 [ref. 23608], Kottelat 1997:181 [ref. 22952], Vasil'eva 1998:145 [ref. 23591], Pinchuk et al. in Miller 2004:72 [ref. 27853]). •Synonym of Proterorhinus nasalis (De Filippi 1863) -- (Neilson & Stepien 2009:98 [ref. 30487], Parin et al. 2014:503 [ref. 33547], Jouladeh-Roudbar et al. 2020:246 [ref. 37983], Parenti 2021:77 [ref. 38603]). Current status: Synonym of Proterorhinus nasalis (De Filippi 1863). Gobiidae: Gobiinae. Habitat: freshwater.