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Fossil Identification


Phacops or proteid help


JohnB   14-08-2015 om 19:36

JohnB
Junior Lid
Lid sinds: 09-07-2015
Berichten: 17

Hello everyone

I have two trilobites which I'm having problems with. One was sold to me by a French dealer as a phacops from Alnif, Morocco and the other I bought from eBay with several other fossils and was told it was a proteid. I'm aware of the difference in the eyes but these trilos eye lenses have gone leaving just smooth round eyes. Any other ways of distinguishing them?

Thanks

John

 
Lugo   14-08-2015 om 19:57

Lugo
Senior Lid
Fotobeheerder
Lid sinds: 31-01-2010
Berichten: 1556

Hi John

maybe this link

LINK

can help you to understand the differences between the various Orders and Families of trilobites, included the Phacopida and Proetida.

best regards

Lugo

____________________________
Panta rhei

Heraclites

 
Frederik   14-08-2015 om 20:34

Frederik
Beheerder
Fotobeheerder
Lid sinds: 28-09-2003
Berichten: 8627

Hi John,

Can you post a picture? Depending on the genera involved, it might be quite easy to give you some good rules of thumb to distinguish them. Usually the eyes are a giveaway, but the most common proetid on the Moroccan market (Gerastos) has 10 segments, while the phacopinae have 11.

____________________________
Try to learn something about everything and everything about
something (TH Huxley)

 
JohnB   14-08-2015 om 00:50

JohnB
Junior Lid
Lid sinds: 09-07-2015
Berichten: 17

Thanks Lugo. I did find the site and had a brief look yesterday. I'll look again. It's s great resource.

John

 
JohnB   14-08-2015 om 00:51

JohnB
Junior Lid
Lid sinds: 09-07-2015
Berichten: 17

Hi Frederik

Are segments the horizontal parts in the thorax?

John

 




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