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Protactinocerida
Taxonomy
Protactinocerida is an order. It is not extant.
It was assigned to Actinoceridea by Crick (1981); and to Cephalopoda by Sepkoski (2002).
It was assigned to Actinoceridea by Crick (1981); and to Cephalopoda by Sepkoski (2002).
Subtaxa
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Or. †Protactinocerida
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G. †Benxioceras
G. †Mastoceras
Fm. †Protactinoceratidae Chen 1979
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G. †Protactinoceras
G. †Sinoeremoceras Kobayashi 1933
G. †Wanwanoceras Kobayashi 1933
Diagnosis
No diagnoses are available