Chondrostoma toros

Common name. Taurus nase.

Diagnosis. Distinguished from other species of Chondrostoma in Central Anatolia and eastern Mediterranean basin by: ○ 56–64 total lateral-line scales / ○ 6−6 pharyngeal teeth / ○ 8−10½, usually 9½, branched dorsal rays / ○ 9−11½, usually 10½, branched anal rays / ○ 25−30 gill rakers / ○ thick cornified sheath covering lower lip / ○ keel between anus and posterior pelvic base absent or very poorly developed / ○ no keel on back in front of dorsal. Size up to 208 mm SL.

Distribution . Türkiye: Göksu drainage.

Habitat. Medium-sized streams to large rivers with rocky or gravelly bottoms and swift to moderate currents. Spawns on gravel substrate in swift-flowing river stretches.

Biology. No data.

Conservation status. LC.

Remarks. Poorly distinguished from C. ceyhanense, both might be conspecific. Chondrostoma toros, C. ceyhanense, and C. kinzelbachi are all very closely related to C. regium and are difficult to distinguish. Future research may clarify whether they are better treated as distinct populations of C. regium .

Further reading. Bogutskaya 1997a (morphology; as C. regium, Göksu); Küçük et al. 2017 (description); Çiftçi et al. 2020 (phylogeny).