Fig. 5
From: First discovery of nautilids from the Albian–Cenomanian succession of the Koppeh Dagh Basin, NE Iran

Eutrephoceras clementianum; NAT-1, a apertural view, b and c lateral view
From: First discovery of nautilids from the Albian–Cenomanian succession of the Koppeh Dagh Basin, NE Iran
Eutrephoceras clementianum; NAT-1, a apertural view, b and c lateral view