1. A well-defined assemblage of Permian Peri-Gondwanan fusulinids occurs in the Khan Formation in East-Central Iran has been found for the first time in this region.

2. Six genera and 27 species were designated in this assemblage, in which three genera and 14 species are new. In addition, two new species were established from (Leven 1993).

3. The evolutionary pattern of Peri-Gondwanan early Artinskian Perigondwania and Neodutkevitchia are quite similar and homeomorphic to the evolution of Late Gzhelian and Asselian Shagonella and Dutklevitchia from the tropical Tethyan realm.

4. The Eoparafusulina, Perigondwania-Neodutkevitchia assemblage is widely distributed in a narrow southern antitropical belt surrounding Peri-Gondwana and has important applications in understanding the paleogeography, paleotectonics and paleoclimate in East-Central Iran and Peri-Gondwana.

5. The Pennsylvanian-Permian correlation chart provided in this paper shows that the time of deposition of the Khan Formation corresponds to a major unconformity between the Sardar and Jamal Formations in the Shirgesht and Ozbakuh areas and has important applications for paleotectonic reconstruction of the tectonic history of the whole of Iran.