Haploceratidae

Haploceratidae
Temporal range: U Jurassic - L Cretaceous
Scientific classification
Kingdom: Animalia
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Haplocerataceae
Family: Haploceratidae
Zittel 1884

The Haploceratidae is one of the families to go to form the Haplocerataceae, 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 featurelss 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.

References

Arkell et al., 1957 Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geol Society of America and Univ Kansas Press R.C Moore (ed)

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.

Haploceratidae

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