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Paradakeoceras is a genus of early Ordovician cephalopods belonging to the nautiloid order Ellesmerocerida.
Morphology
The shell of Paradakeoceras is an expanding endogastric cyrtocone with the siphuncle situated near the shell's concave margin. A raised ring exists at the base of the body chamber, which is often preserved as a mould.
Paradakeoceras was named by Flower, 1964, for species previously included in Dakeoceras in which the cross section is broadened with consequent loss of lateral lobes in the suture.
Paradakeoceras shows a flattening of the venter which distinguishes it from Quebecoceras and has a reduction in the rate of expansion similar to that of Dakeoceras.
References
Paradakeoceras Wikipedia(Text) CC BY-SA