A New Species of the Genus Bellazona (Gastropoda) from the Early Permian Reef Limestones of Shakhtau

Аннотация

A new species Bellazona acuta sp. nov., is described from the Early Permian reef limestone of Shakhtau (southern Cisuralia). This find significantly expands the geochronological range of the genus Bellazona, which was formerly believed to be limited to the Mississippian of the southwestern United States. The morphology of Bellazona and a closely related genus Cerithioides is discussed.