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Nielsenicrinus japonicus new species (Echinodermata: Crinoidea) from the Late Cretaceous of Japan and its paleobiogeographic implications

A new isocrinine species, Nielsenicrinus japonicus, is described from the Maastrichtian of western Kyushu, Japan. This is the first confirmed occurrence of this genus outside Europe. Three isocrinine genera, Nielsenicrinus, Cainocrinus, and Teliocrinus, have a common arrangement of ligamentary articulations in the primibrachials and secundibrachials. These taxa possibly constitute a single lineage since the Early Cretaceous through the Recent, and they were known only from Eurasia, or from Indian Ocean (Teliocrinus).