Progeronia
# Progeronia

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.

