Microderoceras

Microderoceras
Temporal range: Sinemurian[1]
Scientific classification
Kingdom:Animalia
Phylum:Mollusca
Class:Cephalopoda
Subclass:†Ammonoidea
Order:†Ammonitida
Family:†Eoderoceratidae
Genus:†Microderoceras
Hyatt, 1871
Species [2]
  • Microderoceras birchi
  • Microderoceras nautilum

Microderoceras is a flat sided, evolute, radially ribbed Lower Jurassic ammonite belonging to the ammonitid family Eoderoceratidae and superfamily Eoderoceratoidea. Its whorls are subquadrangular in section; venter on the outer rim, rounded; sides with two rows if distinct spines, tubercles on internal molds, formed at either end of the ribs.

These shelled cephalopods, named by Alpheus Hyatt in 1871, are part of the now extinct Ammonoidea, which are distinct from the shelled nautiloids still found living today.

Distribution

Argentina, Canada and the United Kingdom.[2]

References

Notes
  1. ↑ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2016-02-25. Retrieved 2017-10-18.
  2. 1 2 "Paleobiology Database - Microderoceras". Retrieved 2017-10-19.
Bibliography
  • 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.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.