Giant Mollusca (Hyolitha) from the Permian of East Greenland

Abstract

Elongate, narrowly conical fossils from the Permian of Kap Stosch, northern East Greenland, are referred to the genus Macrotheca, previously known only from Pakistan and Timor. The specimens, and similar problematie molluscs from the Soviet Union previously referred to an extinct Class Xenoconchia, are interpreted as unusually large members of the extinct Class Hyolitha.