Keywords

#plectronocerida

Plectronocerida

Extinct order of molluscs

Plectronocerida is a primitive order from which subsequent cephalopod orders are ultimately derived.

Tue 14th

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Plectronocerida Cephalopod Nautiloid Ellesmerocerida Plectronoceratoidea Plectronoceras Ammonoidea Orthoceras Endocerida Belosepiellidae
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