A new subgenus Strophochonetes (Quadrikentron) is based on Chonetes hudsonica camdenensis. The species 'Chonetes' hudsonicus and 'Chonetes' hudsonicus camdenensis are revised and assigned to the new subgenus. The new subgenus is known from the Early Devonian Appalachian Province [New York, Tennessee] in strata of Oriskany and Schoharie age. Strophochonetes (Quadrikentron) differs from Strophochonetes (Strophochonetes) chiefly in the nature of its dental sockets and certain other features of its cardinalia.

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