Ammonite

The ammonite on the left has been identified as a Promicroceras planicosta, and the one on the right as a Xipheroceras dudressieri. Promicroceras is the commonest ammonite around Charmouth and Lyme Regis. It is often beautifully preserved in coloured calcite crystal, and the long body chamber (the last half of the outer whorl) is usually filled with mud.

 

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Promicroceras planicosta

Type

Molluscs > Cephalopods


Strata

Black Ven Marls

Time period

Lower Jurassic

Age

190 million years

Where found

Charmouth

Found by

Barney Hansford

Museum

Bridport Museum

Accession number

BRPMG 1198