Oppelia
Encyclopedia
Oppelia is a haploceratcean
ammonite and type genus for the Oppeliidae
that lived during the Middle Jurassic between 170 and 164 million years ago. 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
and Oecotraustes
.
Haplocerataceae
Haplocerataceae is a superfamily of ammonoid cephalopods belonging to the Ammonitida that unites three families, the Strigoceratidae, Oppeliidae, and Haploceratidae, listed below....
ammonite and type genus for the Oppeliidae
Oppeliidae
Oppeliidae are compressed to oxyconic, sculptured Haplocerataceae, either unkeeled, unicarinate, bicarinate, or tricarinate; with sutures in great variety, but ribbing usually more or less falcoid or falcate...
that lived during the Middle Jurassic between 170 and 164 million years ago. 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
Oxycerites is an extinct ammonoid cephalopod belonging to the haploceratacean family, Oppeliidae, that lived during the middle of the Jurassic Period, between 164 and 160 million years ago...
and Oecotraustes
Oecotraustes
Oecotraustes is an extinct genus from a well known subclass of fossil cephalopods, the ammonites. It lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago....
.