Sardar Formation with the age of Late Visean - Moscovian consists of much more carbonates beds rather than other sections in Ozbak-Kuh Mountains, Since includes aboundant rogusa and tabulata corals. In this study, 7 Species belonging to 5 genera of rogusa and tabulata corals have been identified from a coral-bearing unit with thickness of 2 m, including: Heritschioides pseudosolitarius, Heritschioides vepres, Heritschioides Cf.vepres, Paraheritschiodes antoni antoni, Multithecopora sp., Orygmophyllum Sp. و Durhamina Sp. Based on studied corals, Serpokhovian age is proposed for this unite. In addition to age revision of Heritschioides Cf vepres, H.vepres, H.pseudosolitarius and Paraheritschioides antoni antoni, Orygmophyllum and Durhamina are reported from Iran for the first time in this study. According to studied corals, a shallow carbonate ramp environment is considered for these beds of the formation. The mentioned Fauna has only been introduced from Ozbak-Kuh Mountains and paleogeographically is unique in the world and Iran.

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