A belemnoid from the late Permian of Greenland

Abstract

Belemnoid remains collected in the Permian of East Greenland by Danish expeditions under the leadership of Dr. Lauge Koch are referred to Dictyoconites groenlandicus FISCHER, n. sp. The material studied includes well preserved rostra, fragmentary phragmocones, and arm hooks. Ontogenetic studies indicate rostral development from a needleshaped body through a smooth, more or less cylindrical Atractites (Ausseites) like stage to the clavate, costate and sulcate type characteristic of Dictyoconites.