Tetragraptus

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

Tetragraptus Temporal range: Ordovician ~478–455 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Tetragraptus fruticosus
Tetragraptus approximatus
Scientific classification
Kingdom:	Animalia
Phylum:	Hemichordata
Class:	Pterobranchia
Order:	†Graptoloidea
Family:	†Dichograptidae
Genus:	†Tetragraptus Salter, 1863
Species
T. akzharensis T. approximatus T. fruticosus T. insuetus

Species[1]

• T. akzharensis
• T. approximatus
• T. fruticosus
• T. insuetus

Distribution

Fossils of Tetragraptus have been found in Argentina, Australia, Bolivia, Canada (Quebec, Yukon, Newfoundland and Labrador and Northwest Territories), Chile, China, Colombia (near Caño Cristales, Meta), the Czech Republic, France, Morocco, New Zealand, Norway, the Russian Federation, Spain, Sweden, the United Kingdom, and the United States (Alaska, Idaho, Nevada, Utah).^[1]