Family: Aphaniidae

Eurasian killifish had been placed in the American family Cyprinodontidae for long but are recognized as an on family: Aphaniidae now (see Freyhof et al. 2017b for discussion). Freyhof and Yoğurtçuoğlu (2020) proposed separation of Aphaniidae into eight monophyletic genera: Anatolichthys, Aphaniops, Aphanius, Apricaphanius, Kosswigichthys, Paraphanius, and Tellia, in addition to the new genera Esmaeilius . According to their new proposal, in Tigris–Euphrates basin, there are four genera ( Aphaniops, Esmaeilus, Kosswigichthys and Paraphanius) which were listed below.