Shell Microstructure and Relief of the Primary Layer of the Late Jurassic Discinisca (Class Lingulata, Family Discinidae)

Аннотация

The organophosphatic-shelled brachiopod Discinisca sp. is first described from the Upper Jurassic of Northwestern Siberia. Its relief and microstructure of outer and inner sides of dorsal brephic and adult valves are described. Discinisca sp. differs from other Mesozoic discinids in the primary layer with concentric relief structures.