trilobite species identification

[HannahB]

can anyone help me identify this trilobite? it will soon be mine but it was mislabelled as Morocconites malladoides which it’s certainly isn’t. have been told it might be a Reedops cephalotes

[Tidgy's Dad]

Reedops looks about right to me. 

Scott @piranha will know for sure. 

[piranha]

Reedops cephalotes hamlagdadianus  has more eye lenses (8-9 per vertical lens file) and more vertical lens files (25-27).

 

A photo showing all the lens files will assist with a more precise ID.

 

 

Chatterton, B.D.E., McKellar, R.C. 2009
Early and Middle Devonian Phacopidae (Trilobita) of Southern Morocco.

Palaeontographica Canadiana, 28:1-110  PDF LINK

[Coco]

I never dared to ask, but what are the numbers inside the facets ? How do you read that ?

 

Coco

[HannahB]

@piranhaif not reedops cephalotes what else could it be?

[piranha]

9 hours ago, Coco said:

I never dared to ask, but what are the numbers inside the facets ? How do you read that ?

Coco

 

The numbers indicate the lens frequency variability. The diagram of Reedops cephalotes hamlagdadianus utilized a sample size of 11 specimens. The smaller numbers indicate the number of individuals that have an additional lens or lenses in a vertical lens file. The anterior file on the left shows that one specimen out of 11 had 7 lenses instead of 6. The tenth file shows that 4 specimens had 9 lenses instead of 8. Files 26 and 27 show a single example indicating that this species usually has a total of 25 vertical lens files.

 

 

4 hours ago, HannahB said:

@piranhaif not reedops cephalotes what else could it be?

 

As mentioned above: A photo showing all the lens files will assist with a more precise ID.

[Coco]

Wow ! Very technical but very interesting ! Thanks @piranha !

 

Coco