†Cooperia Tolmachoff 1930

Tolmachoff 1930. On the fossil faunas from Per Schei's Series D from Ellesmere Land, with exception of Brachiopoda, Corals and Cephalo-poda. Rep. 2nd Norw. Arct. Exped. "lFram" 1898-1902. Oslo Suppl Vol, No. 38 1930: pp. 1-106