Progeronia is a genus of ammonites belonging to the family Perisphinctidae.Corbieres Fossiles
These fast-moving nektonic carnivores lived in the Jurassic period, from 155.7 to 150.8 Ma.Fossilworks
Species Species within this genus include: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 Progeronia breviceps Progeronia lictor Progeronia polyplocoides
Description Shells of Progeronia species can reach a diameter of . 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
External links Jsd Ammonites