Pseudothurmannia
| Pseudothurmannia Temporal range: Cretaceous, 136.4–99.7Ma | |
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| Fossil shells of Pseudothurmannia species from Alpes-de-Haute-Provence, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Ancylocerataceae |
| Family: | Crioceratitidae |
| Genus: | Pseudothurmannia Spath 1923 |
| Synonyms | |
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Pseudothurmannia is an extinct cephalopod genus belonging to the subclass Ammonoidea and included in the family Crioceratidae of the ammonitid superfamily Ancylocerataceae. These fast-moving nektonic carnivores [1] lived in the Cretaceous period, from Hauterivian age to Barremian age.[2]
Species
- Pseudothurmannia angulicostata d'Orbigny 1863
- Pseudothurmannia belimelensis Dimtrova 1967
- Pseudothurmannia grandis Busnardo 1970
- Pseudothurmannia jupiter Anderson 1938
- Pseudothurmannia mortilleti Pictet and de Loriol 1858
- Pseudothurmannia ohmi Winkler 1868
- Pseudothurmannia picteti Sarkar 1955
- Pseudothurmannia pseudomalbosi Sarasin and Schandelmayer 1901
- Pseudothurmannia renevieri Sarasin and Schöndelmayer 1901
- Pseudothurmannia russelli Anderson 1938
Description
Shell os Pseudothurmannia species can reach a diameter of about 4–12 centimetres (1.6–4.7 in). They show flat or slightly convex sides, a surface with dense ribs and a subquadrate whorl section.
Distribution
Fossils of species within this genus have been found in the Cretaceous rocks of Antarctica, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and United States.[1]
References
- ↑ 1.0 1.1 1.2 1.3 The Paleobiology Database
- ↑ Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
- Hoedemaeker, Philip. J. SEXUAL DIMORPHISM IN THE GENUS PSEUDOTHURMANNIA
- Crioceratites