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Mesonascis sp. and Paedumias yorkensis

cameronsfossilcollection

By cameronsfossilcollection

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My first undescribed Mesonascis, it should prep out to reveal a long opistothorax. The Paedumias is also underneath the rock!

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From the album:

My Kinzers Formation Fossil Collection

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piranha

The name Paedeumias has been discarded as a synonym of Olenellus.

 

"P. yorkense" was reassigned as a synonym of Olenellus roddyi.

 

"Retaining the genus or subgenus name Paedeumias would necessitate either making Olenellus paraphyletic, establishing a new paraphyletic genus, or creating two new monotypic genera. Instead, it makes more sense to drop Paedeumias, a name devoid of significance as a phylogenetic unit, and assign all taxa within the Olenellinae to the genus Olenellus. "

 

Lieberman, B.S. 1999. Systematic Revision of the Olenelloidea (Trilobita, Cambrian). Peabody Museum of Natural History, Yale University Bulletin, 45:1-150

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