Durotrigensia
# Durotrigensia

Durotrigensia is a genus of ammonites (Ammonitida) in the perisphinctoid family Parkinsoniidae.

Durotrigensia is sometimes considered a subgenus of Parkinsonia and is related also to Oraniceras and Okribites.

These cephalopods lived during the Bajocian stage of the Middle Jurassic some 170 to 164 million years ago.

## Description

These large to giant ammonites have sharp and finely ribbed inner whorls and smooth outer whorls, without tubercles or lappets.

