Tetragraptus

Tetragraptus Temporal range: Ordovician PreЄ Є O S D C P T J K Pg N
Tetragraptus fruticosus
Tetragraptus approximatus
Scientific classification
Kingdom:	Animalia
Class:	†Graptolithina
Order:	†Graptoloidea
Family:	†Dichograptidae
Genus:	†Tetragraptus Salter, 1863

Tetragraptus is an extinct genus of graptolite from the Ordovician.

References

• Don Lessem & Jan Sovak (1999). Dinosaurs to Dodos: An Encyclopedia of Extinct Animals. Scholastic. ISBN 978-0-590-31684-2.