Petroleuciscus

Coad, Brian W. & Bogutskaya, Nina G., 2010, Petroleuciscus esfahani, a new species of fish from central Iran (Actinopterygii: Cyprinidae), Zootaxa 2534, pp. 37-47 : 45-46

Key to the Petroleuciscus species of Iran and the Tigris-Euphrates basin

1. Dorsal-fin branched rays 6−7½, modally 7½; anal-fin branched rays 7−9½, modally 8½; total vertebrae 34−37; pharyngeal teeth 1.5−4.1; southern Iran............................................................................................................ P. persidis

- Dorsal-fin branched rays 7−9½, modally 8½ or 9½; anal-fin branched rays 7−12½, modally 9−11½; total vertebrae 37−42; pharyngeal teeth usually 2.5−4.2; central and northwestern Iran, Upper Tigris River in Turkey....................2

2. Dorsal-fin branched rays 9½; anal-fin branched rays 9−11½, modally 10½; total vertebrae 39−40; upper Tigris River, Turkey.................................................................................................................................................... P. kurui

- Dorsal-fin branched rays 7−9½, modally 8½; anal-fin branched rays 7−12½, modally 9½ or 10−11½; total vertebrae 37−38 or 41−42 ............................................................................................................................................................. 3

3. Anal-fin branched rays 7−10½, modally 9½; lateral-line scales 36–45; total vertebrae 37−38; Lake Orumiyeh basin, northwestern Iran............................................................................................................................................. P. ulanus

− Anal-fin branched rays 9−12½, modally 10½ or 11½; lateral-line scales 45−56; total vertebrae 41−42; Esfahan basin, central Iran............................................................................................................................... P. esfahani sp. n.