Biology:Adkinsia

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Short description: Genus of molluscs (fossil)

{{Automatic taxobox | fossil_range = {{fossil range|Cenomanian|ref=<ref name="Sepkoski Ceph">"Error: no |title= specified when using {{Cite web}}".

Adkinsia is an extinct genus of cephalopod belonging to the Ammonite subclass.

References

Notable fossil cephalopods (listed by first occurrence)

The belemnite-cuttlefish-like Belosaepia

Marcellus Cephalopod 1896-Dana-ManGeol-Fig917.png

Evolution of
cephalopods

Advanced nautiloids Nautilaceae True ammonites
Early coleoids Proteroctopus Styletoctopus Keuppia Palaeoctopus Paleocirroteuthis
Ceratitid ammonoids late Nautilida
Advanced belemnoids Diplobelids: Diplobelus Belemnites: Belemnites Belemnopsis Belemnotheutis

First appearance of long-lasting lineages Goniatite and ceratite ammonoids Probable coleoid ancestor Bactritida Earliest belemnoids: Aulacocerids: Aulacoceras Phragmoteuthids: Phragmoteuthis
Early forms the earliest cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya
Octopus Pohlsepia

Earliest unambiguous cephalopods: Plectronocerida
- Plectronoceras
Monoplacophoran-like ancestral forms: Knightoconus
Possible, nude, "stem-group cephalopods": Nectocarididae

Wikidata ☰ Q4683243 entry

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