Microderoceras

Microderoceras Temporal range: Lower Jurassic PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Ammonoidea
Order:	Ammonitida
Superfamily:	Eoderocerataceae
Family:	Eoderoceratidae
Genus:	Microderoceras Hyatt, 1871

Microderoceras is a flat sided, evolute, radially ribbed Lower Jurassic ammonite belonging to the ammonitid family Eoderoceratidae and superfamily Eoderocerataceae. 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.

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]

This ammonite-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Ammonites Jurassic ammonites Ammonite stubs Wikimedia Foundation. 2010. Игры ⚽ Нужен реферат? Microderes Microdes Look at other dictionaries: List of ammonites — This list of ammonites is an attempt to create a comprehensive listing of all genera that have ever been included in the subclass †Ammonoidea, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that …   Wikipedia Liste des ammonites — Liste des genres d ammonites Cette liste d’ammonites (projet en cours, traduit de l article anglais) est une première tentative pour lister tous les genres de la sous classe Ammonoidea (hors termes vernaculaires). Gravure illustrant la variétés… …   Wikipédia en Français Liste des genres d'ammonites — Cette liste d’ammonites est une première tentative pour lister tous les genres de la sous classe Ammonoidea (hors termes vernaculaires). Gravure illustrant la variétés des ammonites, par Ernst Haeckel s dans Kunstformen der Natur, 1904 …   Wikipédia en Français Raasay — Ratharsair (gd) Carte montrant Raasay et les îles voisines, dont l île de Skye …   Wikipédia en Français Список Ammonoidea — представляет собой перечень родов подкласса Аммоноидеи, включающий в себя 2 356 родовых названий. A Содержание: A …   Википедия Список родов аммонитов — представляет собой перечень родов подкласса Аммоноидеи, включающий в себя 2 356 родовых названий. A Содержание: A B C D E F G H …   Википедия 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”