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 family of the Haploceratoidea, with the longest duration, extending from the Middle Jurassic (Bajocian) to the Upper Cretaceous (Cenomanian) Their derivation is from the Hildoceratoidea.

Oppeliidae Temporal range: Bajocian - Cenomanian PreꞒ Ꞓ O S D C P T J K Pg N
Oxycerites sp.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Superfamily:	†Haploceratoidea
Family:	†Oppeliidae Bonarelli, 1894
Subfamilies
See text

Subfamilies

Nine subfamilies are recognized, the first eight of which are included in the earlier Treatise, Part L. They are the:

Oppeliinae

Hecticoceratinae

Distchoceratinae

Teramelliceratinae

Phlycticeratinae

Streblitinae

Mazapilitinae

Aconeceratinae

Binneyitinae

The Binneyitinae was added by Donovan et al, 1981, transferred from the Stephanoceratoidea.