Squalius kosswigi (Karaman, 1972)

Freyhof, JÖrg, Yoğurtçuoğlu, Baran, Jouladeh-Roudbar, Arash & Kaya, Cüneyt, 2025, Handbook of Freshwater Fishes of West Asia, De Gruyter : 410

Squalius kosswigi

Common name. Striped chub.

Diagnosis. Distinguished from other species of Squalius in Western and Central Anatolia by: ● inconspicuous, broad, dark-brown stripe on upper part of flank between head and end of caudal peduncle / ● sharp contrast between dark-brown dorsal part and light-brown lateral and ventral part of body in preserved individuals / ○ snout obtuse / ○ 37–42+2–3 lateral-line scales / ○ scale pockets on flank below lateral stripe with a prominent dark-brown blotch / ○ posterior margin of flank scales usually covered with dark-brown pigments giving it a dusky pattern / ○ no dark-brown spot on scale pockets on back / ○ abdomen between posterior extremity of pelvic base and anus only very slightly compressed / ○ anal rays orange in live, blackish in preserved individuals / ○ anal membranes hyaline / ○ caudal peduncle depth 15–19 % SL. Size up to 158 mm SL.

Distribution. Türkiye: Küçük Menderes, Tahtalı drainages, and four coastal streams west to Azmak ( İzmir).

Habitat. Streams with Mediterranean water regime. Can survive in very small pools in dry riverbeds in summer. Also, known from springs and reservoirs.

Biology. Lives up to 6 years. Spawns in March and April. Conservation status. LC.

Further reading. Özuluğ & Freyhof 2011 (description).