Asthenopsis
| Asthenopsis | |
|---|---|
Fossil
| |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Family: | Ptychopariidae
|
| Genus: | Asthenopsis Whitehouse, 1939
|
Asthenopsis is an
Cambrian Period,[1]
which lasted from approximately 542 to 488 million years ago.
References
- ^ a b 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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