Biology:Phricodoceratidae

From HandWiki
Short description: Extinct family of ammonites

Phricodoceratidae
Temporal range: Pliensbachian
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Eoderoceratoidea
Family: Phricodoceratidae
Spath, 1938
Genera

Phricodoceratidae is a family in the Eoderoceratoidea, 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]

Wikidata ☰ Q7188116 entry