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Paradakeoceras

Extinct genus of molluscs From Wikipedia, the free encyclopedia

Paradakeoceras
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Paradakeoceras is a genus of early Ordovician cephalopods belonging to the nautiloid order Ellesmerocerida.[1]

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Morphology

The shell of Paradakeoceras is an expanding endogastric cyrtocone[1] with the siphuncle situated near the shell's concave margin.[2] A raised ring exists at the base of the body chamber, which is often preserved as a mould.[2]

Paradakeoceras was named by Flower, 1964,[1] 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.

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References

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