Alburnoides idignensis

Common name. Kermanshah spirlin.

Diagnosis. Distinguished from other species of Alburnoides in Euphrates and Tigris drainages by: ○ horizontal eye diameter smaller than interorbital distance / ○ no pronounced chin / ○ tip of mouth cleft situated at a horizontal line with lower margin of pupil to lower margin of eye / ○ ventral keel usually partly to completely scaleless / ○ snout stout / ○ mouth terminal or subterminal / ○ 39−49+2−3, usually 40−46+2−3, lateral-line scales / ○ 9−12½, usually 11−12½, branched anal rays / ○ usually 8½ but frequently 7½ branched dorsal rays / ○ 6–10 gill rakers / ○ 37−40, usually 39, total vertebrae / ○ caudal lobes rounded / ○ anal with straight or convex outer margin. Size up to 90 mm SL.

Distribution . Iran: Karkheh and upper Dez (Karun) drainages.

Habitat . Streams and rivers with fast-flowing water, usually with cobble and gravel substrate.

Biology. No data.

Conservation status. LC.

Remarks. Alburnoides idignensis, A. namaki, and A. nicolausi are closely related, and future studies may not support them as independent species.

Further reading. Bogutskaya & Coad 2009 (description); Mousavi-Sabet et al. 2015c (review); Eagderi et al. 2019a (phylogeny).