Oppeliinae is a subfamily within 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 ...
family of Jurassic ammonites. These ammonites are characterized by their predominantly oxyconic forms, compressed with sharp venters in adults and keeled inner whorls. The sutures are complex, consisting of a long series of evenly graded lobes and saddles with finely frilled endings.
[Treatise on Invertebrate Paleontology Part L ''L274'',(Ammonoidea)]
Oppeliinae gave rise to the
Hecticoceratinae during the early Bathonian stage, near the middle of their range, and to the
Taramelliceratinae during the late Callovian. The Taramelliceratinae, in turn, gave rise to the
Streblitinae in the early Kimmeridgian and to the
Haploceratidae in the late Kimmeridgian.
[Classification of Jurassic Ammonitina, D.T. Donovan, ''et al.'' Systematics Assoc no 18]
Oppeliinae has a worldwide distribution dating back to the Middle Jurassic, with the exception of Boreal regions.
List of genera
The Oppeliinae includes the following genera,
[ listed in order of appearance.
:'' Bradfordia''
:'' Oppelia''
:'' Oxycerites''
:'' Paralcidia''
:'' Strugia''
:'' Trimargina''
:'' Magharina''
:'' Oecostraustes''
:'' Stregoxites''
]
References
Oppeliidae
Jurassic ammonites
Bathonian first appearances
Middle Jurassic extinctions
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