Ammonite

Additional images

Not what it appears to be

Despite its appearance, this is an ammonite not a snail. Look very closely at the small break in the shell and you’ll see the suture line, made where the internal chambered shell meets the outside of the shell. Ammonites from the Lower Chalk are very distinctive and developed into a range of bizarre forms. It’s thought that ammonites began to experience stress from climate change and that led them to evolve into a whole new range of forms. It didn’t do them much good though, as they became extinct at the end of the Cretaceous period, along with the dinosaurs and two thirds of life on the planet.

Find out more about ammonites on the molluscs pages.

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Common name

Ammonite

Scientific name

Turrilites acutus

Type

Molluscs > Cephalopods


Strata

Cenomanian Limestone (Lower Chalk)

Time period

Upper Cretaceous

Age

96 million years

Where found

Woolcombe

Found by

Unknown

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.09703