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About: Beekmanoceras     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:Mollusk, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: ThingEukaryoteAnimalMolluscaanimaleukaryotemolluscaspeciesumbel-rc:Mollusk New Facet based on Instances of this Class

Beekmanoceras is a small cephalopod from the Middle Canadian Epoch of New York with a loosely coiled, gyroconic, shell in which the whorls are not in contact and the siphuncle is on the inner or concave side of the whorl. Furnish and Glenister (1964) placed Beekmanoceras in the Trocholitidae (Tarphycerida), interpreting the curvature to be ventral side convex, i.e. exogastastric and the siphuncle to be dorsal. Flower (1964) included Beekmanoceras in the Ellesmeroceratidae believing the siphuncle to be ventral and the curvature to be endogastric with the ventral side concave.