Abstract

A new disparid inadunate crinoid, Cataraquicrinus elongatus n. gen., n. sp. has been discovered in the Blackriveran (Middle Ordovician) Gull River Formation near Kingston, Ontario. The new homocrinacean crinoid is characterized by a very small crown, isotomously branching arms that have as many as nine primibrachials per arm, large elongate anal tube, a proximally pentagonal stem, and a lichenocrinid holdfast. The new genus most closely resembles Tunguskocrinus from rocks of approximately the same age of the Siberian Platform.

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