Fossil group

Turritellid gastropods

Molluscs · Cambrian – Recent

Snails and slugs — molluscs that typically carry a single, coiled shell and creep on a muscular foot. The most diverse molluscs, they range across marine, freshwater and land habitats from the Cambrian onward.

A broad fossil group rather than a single taxon — the units below record it among their fauna or flora.