Chondrostoma holmwoodii (Boulenger, 1896)

Chondrostoma holmwoodii View in CoL View Figure

Common name. Eastern Aegean nase.

Diagnosis. Distinguished from other species of Chondrostoma in Aegean, Marmara, and Black Sea basins by: ○ 60−69 total lateral-line scales / ○ 6−6, rarely 7–6, pharyngeal teeth / ○ 8½ branched dorsal rays / ○ 8−10½, usually 9½, branched anal rays / ○ usually 8 branched pelvic rays / ○ 21−24 gill rakers / ○ thick cornified sheath covering lower lip. Size up to 230 mm SL.

Distribution View Figure . Türkiye: Gediz north to Bakırçay drainages.

Habitat. Mid-sized streams to large rivers with rocky or gravelly bottoms and moderately fast currents, also in reservoirs.

Biology. Lives up to 5 years. Matures at 2–3 years. Spawns March to early May.

Conservation status. VU; appears to be declining within its small range.

Further reading. Elvira 1987 (review); İlhan et al. 2011 (growth, biology); Güçlü et al. 2018 (morphology); Çiftçi et al. 2020 (phylogeny); İlhan et al. 2020 (distribution).