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akolsrud

Identifying Olenellus Trilobite Subspecies

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akolsrud

Is there a way to recognize the Olenellus subspecies by looking at the cephalons only?

-Arild

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FossilDAWG

What subspecies are you interested in? I must confess I was not aware of subspecies within Olenellus.

Don

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Raggedy Man

A photo of said trilobite would go a long way in helping you.

Thanks

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piranha
There are many olenellid species, but no subspecies are mentioned in the literature.
Here is an excellent list of papers to assist with your research on olenellid trilobites:
 
Whittington, H.B. (1989)
Olenelloid trilobites: Type species, functional morphology and higher classification.
Philosophical Transactions of the Royal Society of London, Series B, 324:111-147
 
Palmer, A.R., & Repina, L.N. (1993)
Through a glass darkly: Taxonomy, phylogeny, and biostratigraphy of the Olenellina.
University of Kansas Paleontological Contributions, New Series, 3:1-35
 
Lieberman, B.S. (1998)
Cladistic analysis of the Early Cambrian olenelloid trilobites.
Journal of Paleontology, 72(1):59-78
 
Lieberman, B.S. (1999)
Systematic revision of the Olenelloidea (Trilobita, Cambrian).
Bulletin of the Peabody Museum of Natural History, Yale University, 45:1-150

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akolsrud

My apology, I didn't elaborate very well on my question. My question should have said how can you tell Olenellus gilberti, Olenellus clarki, Mesonacis fremonti, Bristolia mohavensis, Bristolia bristolensis and Bristolia insolens apart from the Amboy/Cadiz/Chambless area given just the cephalons. There are pictures on the web, but it is hard to transform that knowledge to actual specimens at hand.

-Arild

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