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Progeronia
Genus of molluscs (fossil) From Wikipedia, the free encyclopedia
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Progeronia is a genus of ammonites belonging to the family Perisphinctidae.[1]
These fast-moving nektonic carnivores lived in the Jurassic period, from 155.7 to 150.8 Ma.[2]
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Species
Species within this genus include:[3]
- Progeronia breviceps
- Progeronia lictor
- Progeronia polyplocoides
Description
Shells of Progeronia species can reach a diameter of 6–23 millimetres (0.24–0.91 in).[1] These large shell are large and involute, with a bifurcated or trifurcated ribs.[1]
Distribution
Fossils of species within this genus have been found in the Jurassic sediments of Algeria and Hungary.[2]
References
External links
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