Asthenopsis

Asthenopsis; Temporal range: Cambrian
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Ptychopariida
Family:	†Ptychopariidae
Genus:	†Asthenopsis; Whitehouse, 1939
Species
	A. butorosa; A. levior (type); A. opalensis; A. queenslandica; A. rhinostrongyla; A. unquinsepta;

Asthenopsis 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 542 to 488 million years ago.

References

1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Archived from the original on September 5, 2006. Retrieved 2008-01-12.

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