Ammonite

Additional images

Sutures and chambers

Ammonites are divided into a series of chambers by walls that become highly folded as they meet the edge of the shell. This creates the wavy suture lines – in this example, the shell has broken away to reveal these beautiful patterns. The black paint illustrates the chamber, now filled with sediment, between two chamber walls marked by two parallel but intricately-folded suture lines.

Find out more about ammonites on the molluscs pages.

Common name

Ammonite

Scientific name

Sigaloceras

Type

Molluscs > Cephalopods


Strata

Kellaways Beds

Time period

Middle Jurassic

Age

165 million years

Where found

Corscombe

Found by

Found & presented to the museum by Paul Ensom in 1980

Museum

Dorset County Museum, Dorchester

Accession number

DCM.G.00656