Tetragraptus

Tetragraptus is an extinct genus of graptolites from the Ordovician period.

Species

Source:

T. akzharensis
T. approximatus
T. fruticosus
''T. insuetus''
Distribution

Fossils of Tetragraptus have been found in Argentina, Australia, Bolivia, Canada, Chile, China, Colombia, the Czech Republic, France, Morocco, New Zealand, Norway, the Russian Federation, Spain, Sweden, the United Kingdom, and the United States.