A New Genus and Species of the Gastropod Family Struthiolariidae, Antarctodarwinella Ellioti, from Seymour Island, Antarctica

Abstract

A distinctive species of struthiolariid previously referred to as Slruthiolarella by Wilckens (1.911) is assigned to the new genus Antarctodarwinella. Anlarctodarwinella is proposed for medium sized, semi-globular, heavily calluscd Antarctic struthiolariid gastropods with a moderately elevated conical spire consisting of 4 to 5 whorls. This genus is represented by the species Antarctodarwinella ellioti n. sp. and A. nordenskjoldi (Wilckens). Although the genus has not been recognized outside Anttarctica, it is very abundant throughout the lower 620 feet of the Seymour Island Series exposed, on the northern third of Seymour Island.