Dumortieria

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Dumortieria
Temporal range: Late Jurassic
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Hildocerataceae - Dumortieria jamesoni. Salzburg, Haus der Natur.jpg
Fossil of Dumortieria jamesoni at Haus der Natur, Salzburg
Scientific classification
Kingdom:
Animalia
Class:
Cephalopoda
Subclass:
†Ammonoidea
Order:
†Ammonitida
Superfamily:
† Hammatoceratoidea
Family:
† Graphoceratidae
Genus:
†Dumortieria
Synonyms
  • Paradumortieria Elmi and Caloo-Fortier 1985
  • Phenakoceras Maubeuge 1949
  • Phenakocerites Maubeuge 1950

Dumortieria is a genus of ammonites belonging to the family Graphoceratidae. [1]

Contents

Fossil record

These cephalopods were fast-moving nektonic carnivores. They lived in the Early Jurassic, upper Toarcian age (from about 180.1 to 175.6 million years ago). Fossils of species within this genus can be found in Bulgaria, Canada, France, Germany, Hungary, Iran, Italy, Spain and Tunisia.

Description

Fossil of Dumortieria radiosa Dumortieria radiosa - Naturhistorisches Museum, Braunschweig, Germany - DSC05133.JPG
Fossil of Dumortieria radiosa

Dumortieria are rather similar to Grammoceras and Catulloceras from the same age, having a thin, discoidally evolute shell with simple, gently sigmoid ribbing and a low ventral keel, but this genus has a less rounded venter and Catulloceras has a subquadrate whorl section. [2] [3]

Species

Species within this genus include: [2]

See also

References

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