Clio bartletti n.sp., a fossil new to science closely related to Clio cuspidata (Gastropoda, Thecosomata)

Clio bartletti n. sp. is described from a sediment sample containing a mixture of late Pleistocene and recent pelagic and benthic sediment. The sample is described and correlated with climatic fluctuations using protoconch size as a temperature indicator. In all probability the new species is an Alleröd fossil.