Autecology and systematics of a new Silurian anomphalid gastropod from western North Greenland

Abstract

Grantlandispira christiei gen. et sp. nov. is an anomphalid gastropod characterised by a shallowly cyrtoconoid spire, subsutural sinus and angular periphery. General form of the shell and the massive funicle within the umbilicus indicate a close relationship to Pycnomphalus Lindstrom, 1884 and this genus, together with Grantlandispira, and possibly Turbocheilus Perner, 1907 are referred to a new subfamily, Pycnomphalinae. Shell morphology and the radial aperture suggest that Grantlandispira was an infaunal or semi-infaunal ciliary feeding gastropod, similar in its life style to Umbonium Link, 1807.