Oxynoemacheilus parvinae Sayyadzadeh, Eagderi & Esmaeili 2016

Oxynoemacheilus parvinae is distinguished from other congeners in Tigris River drainage by a combination of the following characters: dorsal fin with 8½-9½ branched rays (vs. 7½-8½ in O. bergianus, 8½ in O. longipinnis, 9½-10½ in O. karunensis); large to medium dark-brown spots especially on the post-dorsal part in some individuals independent of size and sexual dimorphism (vs. pale body pattern in O. longipinnis, small and more regular bar like in O. bergianus and O. karunensis); caudal fin slightly to deeply emarginated (vs. deeply emarginated to forked in O. longipinnis); and angular shape of bony capsule of swim bladder with developed posterior process. It also differs from O. karunensis by the lack of two prominent black spots at the caudal-fin base (vs. presence) (Ref. 115530).Description: Anal fin with 4½-5½ branched rays; pectoral fin with 10-11 branched rays; and pelvic fin with 7-8 branched rays; body covered by embedded scales; (Ref. 115530).

The river at the Sefidbarg sampling site measures 5 m wide, with substrate consisting of coarse gravel and small boulders, and semi fast-flowing and semi-transparent waters. The riverbanks are composed of some vegetation (Ref. 115530).

Oxynoemacheilus parvinae is a species of stone loach which is endemic to the drainage of the Sirvan River, a tributary of the Tigris in Kermanshah Province of Iran where it prefers reasonable fast flowing, relatively clear water of a gravel substrate. it has not been evaluated for The IUCN Red List of Threatened Species but it may be threatened by drought, water abstraction and pollution. The specific name honours Parvin Etesami, a famous Iranian poet of the 20th-century.