Progeronia

Progeronia is a genus of ammonites belonging to the family Perisphinctidae.[1]

Progeronia
Temporal range: Jurassic
↓
Progeronia lictor from Tulear (Madagascar), Kimmeridgian stage
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Family:
Perisphinctidae
Genus:
Progeronia

(Arkell 1953)

These fast-moving nektonic carnivores lived in the Jurassic period, from 155.7 to 150.8 Ma.[2]

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
  1. Corbieres Fossiles
  2. Fossilworks
  3. 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


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