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Phricodoceratidae

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This is an old revision of this page, as edited by Abyssal (talk | contribs) at 03:23, 15 November 2015 (removed Category:Early Jurassic first appearances; added Category:Pliensbachian first appearances using HotCat). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Phricodoceratidae
Temporal range: Pliensbachian
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Suborder:
Ammonitina
Superfamily:
Eoderocerataceae
Family:
Phricodoceratidae

Spath, 1938
Genera

Phricodoceratidae is a family in the Eoderocerataceae, aberrant ammonites from the Lower Jurassic characterized by a large adult size and a marked change of shell form and ornament with growth. Shells are stoutly ribbed, early growth stage is round-whorled with spines, followed by a high-whorled late growth stage with smooth, modified ribbing.

Three genera are currently placed in the Phricodoceratidae: Phricodoceras, Epideroceras, and Pseuduptonia.

References

  • Arkell, et al., 1957. Mesozoic Ammonoidea, in Treatise on Invertebrate Paleontology, (Part L); Geological Soc. of America and University of Kansas press.
  • Donovan, Callomon, and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. [1]
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