Keywords

#ellesmerocerida

Ellesmerocerida

Extinct order of nautiloids

The Ellesmerocerida is an order of primitive cephalopods belonging to the subclass Nautiloidea with a widespread distribution that lived during the Late Cambrian and Ordovician.

Sun 14th

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Ellesmerocerida Evolution of cephalopods Cephalopod Nautiloid Plectronoceratoidea Multiceratoidea Septum (cephalopod) Yanhecerida Ammonoidea Plectronocerida
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