systematic interpretation of silicified specimens of upper cretaceous echinocorys ex. gr. scutata (leske, 1778), farokhi formation, central iran

echinocorys ex. gr. scutata is one of the most important echinids in the upper cretaceous deposits. in this regard, a stratigraphic section of the farokhi formation in the central iran is sampled. this formation is less known and described in the geology of iran. according to the macropaleontological investigations, 1 genus and 1 specious of completely silicified echinocorythidae are determined and described. in these investigations, the samples are regarded also from the statistical point of view.