Icriodus and Polygnathus faunas from the Late Devonian of the Tabas region of eastern Iran, and from the Middle-Late Devonian of the Alborz Mountains, northern Iran, are documented. Twenty three species and/or subspecies of Icriodus and 33 of Polygnathus are described and illustrated. Among them are five new species of Icriodus: Ic. housei, Ic. talenti, Ic. bultyncki, Ic. walliseri and Ic. jafariani.