rubromaculatus, Gobius Kriesch [A.] 1873:371, Pl. 6 [Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien. v. 23; ref. 18435] Danube River near Budapest, Hungary. Syntypes: NMW 29588-91 (4). •Synonym of Proterorhinus marmoratus (Pallas 1814) -- (Berg 1949:1100 [ref. 20662], Miller 1973:511 [ref. 6888], Vasil'eva 1998:145 [ref. 23591], Pinchuk et al. in Miller 2004:72 [ref. 27853]). •Synonym of Proterorhinus semilunaris (Heckel 1837) -- (Neilson & Stepien 2009:98 [ref. 30497]). Current status: Synonym of Proterorhinus semilunaris (Heckel 1837). Gobiidae: Gobiinae. Habitat: freshwater, brackish.