Tetragraptus

Tetragraptus
Temporal range: Ordovician
~478–455 Ma
Tetragraptus fruticosus
Tetragraptus approximatus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Hemichordata
Class: Pterobranchia
Order: Graptoloidea
Family: Dichograptidae
Genus: Tetragraptus
Salter, 1863
Species

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