Ammonite

Additional images

The largest ammonite in our collection!

This specimen is identified as Glaucolithies, but most people know the giant ammonites from Portland as Titanites. What’s the difference? They both have different shell profiles and ribbing. It’s hard to imagine such a huge ammonite scooting around in the sea. 

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Glaucolithies

Type

Molluscs > Cephalopods


Strata

Portland Limestone

Time period

Upper Jurassic

Age

150 million years

Where found

Unknown

Found by

Unknown

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.06261