Haploceratidae
From Wikipedia, the free encyclopedia
| Haploceratidae Temporal range: U Jurassic - L Cretaceous | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Superfamily: | †Haploceratoidea |
| Family: | †Haploceratidae Zittel, 1884 |
| Genera[1] | |
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The Haploceratidae is the type family of the Haploceratoidea, a superfamily in the ammonitina; which according to Donovan et al. (1981) can be derived from the Taramelliceratinae, a subfamily of the Oppeliidae.
Haploceratids, (Haploceratidae) are typically small, smooth and somewhat featureless ammonites, as described by Arkell et al, without ribbing or ventral keels and moderately undifferentiated sutures; that range from the Late Kimmeridgian to the Hauterivian, crossing from the Jurassic into the Cretaceous.
