Oxynoemacheilus hazarensis Freyhof & Özuluğ 2017

Oxynoemacheilus hazarensis can be distinguished from all it congeners in the Tigris and Euphrates drainages by a combination of characters, none of them unique. It shares with other members of a group of species (O. chomanicus, O. frenatus, O. gyndes, O. kaynaki, O. kiabii and O. zagrosensis) which lack a suborbital groove in males (vs. present in O. bergianus, O. euphraticus, O. hanae, O. longipinnis, O. karunensis, O. kurdistanicus and O. parvinae) and in having a slightly emarginate or truncate caudal fin (vs. deeply emarginate or forked in O. argyrogramma, O. bergianus, O. euphraticus, O. hanae, O. longipinnis, O. karunensis, O. kurdistanicus and O. parvinae).

Dorsal soft rays (total): 7 - 8; Analsoft rays: 5

Oxynoemacheilus hazarensis is a species of stone loach which is endemic to Lake Hazar in Turkey and which was described in 2017. Lake Hazar is one of the sources of the Tigris, if O. hazarensis is confirmed to be endemic to Lake Hazar it will be third fish species endemic to that lake, the others being the cyprinodontid Aphanius asquamatus and the cyprinid Alburnus heckeli.