Quadragnostus
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.
| Quadragnostus | |
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| Family: | Metagnostidae |
| Genus: | Quadragnostus Howell, 1966 |
References
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560.
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