Choanoceratidae

The Choanoceratidae is a small, mono-generic, family of extinct orthoceratoid cephalopods in the order Orthocerida that lived in what would be Europe during the middle Silurian from 428.2—426.2 mya, existing for approximately 2 million years.

Choanoceratidae

The Choanoceratidae is a small, mono-generic, family of extinct orthoceratoid cephalopods in the order Orthocerida that lived in what would be Europe during the middle Silurian from 428.2—426.2 mya, existing for approximately 2 million years.