''Oxycerites'' is an extinct
ammonoid cephalopod belonging to the
haploceratoid family,
Oppeliidae
Oppeliidae are compressed to oxyconic, sculptured Haploceratoidea, either unkeeled, unicarinate, bicarinate, or tricarinate; with sutures in great variety, but ribbing usually more or less falcoid or falcate. The Oppeliidae is the principal famil ...
, that lived during the
Middle Jurassic.
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
Distribution
Jurassic of Argentina, France, Germany, Iran, Madagascar, Russia, Saudi Arabia and the United Kingdom
References
Ammonitida genera
Oppeliidae
Jurassic ammonites
Prehistoric animals of Madagascar
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