Oxycerites

Oxycerites


Oxycerites
Temporal range: Jurassic
[1]
Specimens from Poland
Scientific classification e
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Oppeliidae
Genus: †Oxycerites
Species

see text

Oxycerites is an extinct ammonoid cephalopod belonging to the haploceratacean family, Oppeliidae, that lived during the middle of the Jurassic Period,[1] between 164 and 160 million years ago

Shells of Oxycerites are involute, compressed and generally smooth with a sharply rounded venter on the outer rim, deeply impressed dorsum on the inner rim, and a small umbilicus. The living chamber takes up slightly more than half a whorl. Oxycerites grew to a diameter of at least 17.5 cm, about 7 inches.

Oppelia and Oecotraustes are similar and closely related forms. Oppelia is smoother, Oecotraustes more strongly ribbed

References

  1. ^ a b Jack Sepkoski 2002. A compendium of fossil marine animal genera (Cephalopoda entry); Bulletins of American Paleontology, vol.364, p.560 [1]


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