Progeronia
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] SpeciesSpecies within this genus include:[3]
DescriptionShells 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] DistributionFossils of species within this genus have been found in the Jurassic sediments of Algeria and Hungary.[2] References
External links
|