The oldest Lingulids of the Siberian Platform: Microornamentation and shell structure

Abstract

New brachiopod genus of the order Lingulida Sukharilingula with new type species S. luchininae is described from the Lower Botomian (Lower Cambrian) of northwestern Siberian Platform, basin of the Yenisei River, section on the Sukharikha River. The study of the microornamentation and shell structure of the new genus revealed that the initial shell structure of lingulid shells could transform in the course of early diagenesis. The importance of reconstruction of burial conditions of the valves for the reconstruction of posthumous transformations is discussed.