Fonestical study of the Collected Fossils Phylum Mollusca, Bivalves Class, from Surrounding the Dadghan Village, Tafresh County- Markazi Province

The Mollusca are smooth skin and without split and with a variety of morphology that often isolated in a calcareous shell. In during year 2010 has been conducted, in the surrounding Dadghan village from Tafresh County of Markazi Province, and the entire extended layers in this region were found and the sampling operation has been carried out in perpendicular direction to these layers. then sampling stations Zoogeographical region recorded by the GPS and samples was transferred to the biological laboratory of Arak University, finally, the samples was identified by valid resources identification. In the present study, studied fossil belongs to genus Pectin from Pectenidae family. The genus of Bivalvia class, the Bivalvia class is mollusca that live in freshwater and marine. Some of the main characteristics of this genus are: external shell of circular, lateral symmetry in one valve and inequality with the other valve, presence of a singular muscle, and superficial frills are observed on the shell in the form of radial and thick lines. The genus of Pectin are new record for Markazi Province