Quadragnostus

Quadragnostus; Temporal range: Cambrian
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Agnostida
Family:	Metagnostidae
Genus:	Quadragnostus; Howell, 1966

Quadragnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Cambrian Period,^[1] which lasted from approximately 539 to 485 million years ago.

References

^ ^a ^b Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560.

This Agnostida-related article is a stub. You can help Wikipedia by expanding it.