Oppeliidae

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
Subfamilies
see text

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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.

Subfamilies[]

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

Oppeliinae

Hecticoceratinae

Phlycticeratinae

Streblitinae

Mazapilitinae

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

References[]

• D.T Donavan, J.H. Callomon, and M.K Howarth. 1981. Classification of the Jurassic Ammonitina. In The Ammonoidea. M.R. House and J.R. Senior, eds. Systematics Assoc. Pub Academic Press.
• Treatise on Invertebrate Paleontology Part L Mollusca 4, Mesozoic Ammonoidea. R.C Moore (ed.); Geol. Society of America and Univ. Kansas Press. (1957)

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