Oxynoemacheilus marmaraensis

Common name. Marmara loach.

Diagnosis. Distinguished from other species of Oxynoemacheilus in Marmara and Black Sea basin by: ○ flank with mottled or vermiculate pattern / ○ no axillary lobe at pelvic base / ○ caudal-peduncle depth 1.2–1.6 times in its length / ○ caudal moderately emarginate, lobes slightly rounded / ○ no median incision in upper lip / ○ distance between pectoral and pelvic origins 29–34 % SL / ○ no prominent dorsal crest on caudal peduncle / ○ suborbital groove present in male. Size up to 75 mm SL.

Distribution. Türkiye: Emet drainage, a tributary of Susurluk.

Habitat. Moderately fast-flowing streams.

Biology. No data.

Conservation status. EN; poorly known and potentially more common and less threatened.

Further reading. Turan et al. 2023 (description).