The Halashi 1 section in south of Kermanshah, West Iran with a thickness of 243 m consists of chert, limestone, mudstone, marlstone and shale and can be divided into 10 Beds/Bedsets. From the studied section, which led to identification the genus Pantanellium that is one of the most prolific genera among Mesozoic radiolarians, 143 samples were collected. In present study, five species including Pantanellium whalenae, Pantanellium cf. riedeli, Pantanellium cumshewaense,Pantanellium squinaboli andPantanellium cf. lanceola were identified that indicated an Early Tithonian age for the studied section. Identification of species is according to the pore frame number and the configuration, which are important criteria in the taxonomy of the family Pantanelliidae.