Penarosa

Penarosa; Temporal range: Cambrian[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Ptychopariida
Suborder:	Ptychopariina
Superfamily:	Ptychoparioidea
Family:	Nepeidae
Genus:	Penarosa

Penarosa is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the Middle Cambrian (Ptychagnostus atavus Zone to Ptychagnostus punctuosus Zone),[1] approximately 505 to 500 million years ago.

References

Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-12.

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[Sepkoski-1] Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-12.