Callovian-Oxfordian (Jurassic) bivalves from the Kamar-e-Mehdi Formation of east-central Iran

The Kamar-e-Mehdi Formation (Callovian – Oxfordian) is the fill of a shelf lagoon situated in the western and central parts of the so-called Tabas Block for a N-S distance of 200-300 km. From the predominantly fine-grained carbonates, which in the depocenter reach more than 1000 m in thickness, 69 taxa of bivalves are described, which differ greatly in their preservation depending on their original shell mineralogy. Aragonitic taxa are only preserved as internal or composite moulds, whereas calcitic taxa occur in shell preservation. New to science is the pectinid Camptonectes (Grandinectes) teres subgen. nov. et sp. nov. and the pholadomyid Agrawalimya tubularis sp. nov. Most of the taxa are common also in the Middle und Upper Jurassic of Europe. Exceptions are the genera Agrawalimya, which so far is known only from the Callovian of Kachchh, western India, and Neoburmesia, which is solely known from Japan.