Ammonite

Lacy lines

Look closely and you can see beautiful wavy lines on this shell, known as suture lines. The ammonite shell was divided into chambers, and where the chamber wall met the shell, it folded like a curtain to create this lacy pattern. The last whorl of the shell is only partially preserved and has no suture lines.

The name Rasinia comes from the town of Market Rasen in Lincolnshire. This is where the Kimmeridge Clay was once quarried and the ammonite was discovered.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Rasenia

Type

Molluscs > Cephalopods


Strata

Kimmeridge Clay

Time period

Upper Jurassic

Age

155 million years

Where found

Unknown

Found by

Unknown

Museum

Fairlynch Museum, Budleigh Salterton

Accession number

BULFM-2013-116