| Progeronia Temporal range: Jurassic PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
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| Progeronia lictor from Tulear (Madagascar), Kimmeridgian stage | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Family: | Perisphinctidae |
| Genus: | Progeronia (Arkell 1953) |
Progeronia is a genus of ammonites belonging to the family Perisphinctidae.
These fast-moving nektonic carnivores lived in the Jurassic period, from 155.7 to 150.8 Ma.
Species
Species within this genus include:
- Progeronia breviceps
- Progeronia lictor
- Progeronia polyplocoides
Description
Shells of Progeronia species can reach a diameter of 6–23 millimetres (0.24–0.91 in). These large shell are large and involute, with a bifurcated or trifurcated ribs.
Distribution
Fossils of species within this genus have been found in the Jurassic sediments of Algeria and Hungary.
References
- ^ Corbieres Fossiles
- ^ Fossilworks
- Almeras Yves, 1963: Application des methodes biometriques et statistiques a letude de quelques Perisphinctides kimmeridgiens du genre Progeronia, Arkell, 1953 Bulletin du Bureau de Recherches Geologiques et Minieres, Section 2: Geologie Appliquee, Chronique des Mines 3 – Pg. 1-28
External links
| Taxon identifiers | |
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| Progeronia | |
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