trilobite cephalon

[terapoza]

Hi. My name is Adam and I'am new to the forum. I am trying to identify correctly all my fossils and more i read than more questions I have. first position in my catalogue of fossils is this trilobite cephalon from Latham Shale, Providence Mountains in California. Previously was identified as a Fremontia fremonti but I am not sure about that. It's 26 mm wide. I don't know if the details of the specimen are good enough to say what species is it. I would be very pleased with some help.

 

[ynot]

Welcome to TFF!

Nice piece!

@piranha should be able to help.

[Tidgy's Dad]

It looks like it. 

But I understand this species is now referred to as Mesonacis fremonti. 

This may have changed again, I'm sure someone will soon be along to correct me if I'm wrong. 

Nice find, and a very warm welcome to the forum, Adam. 

And you have a most excellent name.

[piranha]

 

figures from:

 

Lieberman, B.S. (1999)
Systematic revision of the Olenelloidea (Trilobita, Cambrian).

Bulletin of the Peabody Museum of Natural History, Yale University, 45:1-150  PDF LINK