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Rhabdiferoceras : ウィキペディア英語版 | Rhabdiferoceras
''Rhabdiferoceras'' is an extinct orthocerid genus belonging to the Baltoceratidae that lived in what would be North America during the Cassinian Stage at the end of the Early Ordovician, existing for approximately two million years from about 474 -472 mya.〔(PaleoBiology Database: ''Rhabdiferoceras'', basic info )〕 ==Taxonomy== ''Rhabdiferoceras'' was named by Flower (1964). Its type is ''Rhabdiferoceras annuliferum''. It was assigned to ''Baltoceratidae'' by Flower (1964) and Hook and Flower (1977).〔R. H. Flower. 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources, New Mexico Institute of Mining and Technology, Memoir 12:234〕〔S. C. Hook and R. H. Flower. 1977. Late Canadian (Zones J, K) cephalopod faunas from Southwestern United States. New Mexico Bureau of Mines and Mineral Resources 32:1-56〕
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