Progeronia

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Phylum:Mollusca
Subclass:Ammonoidea
Order:Ammonitida
Progeronia
Temporal range: Jurassic
Progeronia lictor from Tulear (Madagascar), Kimmeridgian stage
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Perisphinctidae
Genus: Progeronia
(Arkell, 1953)

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]

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

References

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