Devonian Trilobites (Acanthopyge, Asteropyginae, Crotalocephalina, Gerastos, Metacantina, Paraljurus, Phacops, Proetus)

[ntloux]

Over the years I have found it difficult to pass up a nice trilobite.  Several were without identification or background information; I gambled that I would be able to identify these trilobites using information on the internet (images mostly).  I am attaching images of those that I believe to be Devonian trilobites.  I would most sincerely appreciate corrections and/or further species identification from those with more expertise.

 

The first image is of a trilobite that I acquired at an antique store in Alaska that was liquidating an estate with a private museum.  Through comparison with images on the internet, I have tentatively identified it as an Acanthopyge trilobite.

 

 

The second image is of a partially entrolled trilobite that I have preliminarily identified as an Asteropyginae trilobite (through images on the internet).

 

The third image is of a Crotocephalina gibbus trilobite from the Devonian in Alnif, Morocco.

 

 

The fourth image is of a Gerastos trilobite from the Devonian in Zguid, Morocco.

 

 

The fifth image is presumably a Metacantina trilobite from the Devonian in Morocco.

 

 

The sixth image is presumably a Paralejurus trilobite from the Devonian in Morocco.

 

 

The seventh image is presumably a Phacops trilobite from the Devonian.

 

 

The eighth and final image is of a Proetus granulosus trilobite from the Devonian in Morocco.

 

 

Any further information/discussion about these trilobites would be appreciated.

 

[Darktooth]

@piranha should be able to help.

[Kane]

The first one is very likely a fabrication. The seventh one is not a Phacops, but another Metacanthina.

[piranha]

Gerastos granulosus is a popular name across the internet, but is not a valid species in Morocco. 

 

The most common Moroccan species is: Gerastos tuberculatus marocensis

 

Images 5 & 7 are Hollardops.  Metacanthina should have a pronounced anterior cephalic projection.

[ntloux]

Kane, Alas I fear you are right.  I examined the rear of the Acanthopyge and discovered that it scratches quite easily in a manner similar to a resin.  I harken back to my belated Father's advice: "Everyone gets flensed once in a while, just try to keep it to a minimum".  I wish to thank Darktooth, Kane and Piranha for their comments.  Nick