Ammonite

Rare survivor

Here is a really rare example of the ammonite Phylloceras. Along with Psiloceras, this is the only other ammonite known to have survived the great Triassic/Jurassic extinction event. Phylloceras appears to have remained unchanged through the Lower and Middle Jurassic period, while Psiloceras is regarded as the common ancestor of all other ammonites.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Phylloceras

Type

Molluscs > Cephalopods


Strata

Upper Lias, Junction Bed

Time period

Lower Jurassic

Age

180 million years

Where found

Seatown, in the Beacon Limestone Formation previously known as the Junction Bed

Found by

Unknown

Museum

Bridport Museum

Accession number

BRPMG 10823