Dumortieria

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Phylum:Mollusca
Class:Cephalopoda
Subclass:†Ammonoidea
Order:†Ammonitida
Dumortieria
Temporal range: Late Jurassic
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Fossil of Dumortieria jamesoni at Haus der Natur, Salzburg
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
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]

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 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

See also

References

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