''Oppelia'' is a haploceratoid ammonite and type genus for the

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 The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174.1 to 163.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relatively rare, but geological formations co ...

. Shells of ''Oppelia'' are involute with a small to moderate size umbilicus, bluntly rounded to sharp venter, and deeply impressed dorsum. Sides are generally smooth but may be variously ribbed on the outer flanks. Similar and related genera include ''

Oxycerites ''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 ...

'' and ''

Oecotraustes ''Oecotraustes'' is an extinct cephalopod genus included in the ammonid family Oppeliidae Oppeliidae are compressed to oxyconic, sculptured Haploceratoidea, either unkeeled, unicarinate, bicarinate, or tricarinate; with sutures in great varie ...

''.

Distribution

Jurassic of Germany, Greenland, India, Italy, Madagascar, Mexico, Poland, Spain and the United Kingdom

References

Ammonitida genera Oppeliidae Jurassic ammonites Ammonites of Europe {{ammonitina-stub