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Ruger9a

Trilobite ID request

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Ruger9a

Good morning folks.  I have just received a Trilobite from the Silurian Period of Kankakee, Illinois.  It has not been identified by the seller and I'm wondering if someone here might know what species this is.

20201122_082116 (3).jpg

20201122_082129 (3).jpg

20201122_082150 (3).jpg

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20201122_082313 (2).jpg

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Ruger9a

The last picture.

20201122_082340 (2).jpg

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Darktooth

What is the size? @piranha @Kane

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Ruger9a

Sorry, I forgot to put the ruler in the pics.  It's 50mm x 35mm - just the cephalon. 

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fossilcrazy

The Cephalon looks like it would belong to a Dalmanites, or Odontochile.

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Kane

I agree with dalmanitid, but I'll need to check my sources later on today to suss out which one. I know there was a newly erected genus (Glyptambon) in that area. I'm not saying it is that one, or Dalmanites, but we can keep those possibilities open for now. :) 

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Ruger9a
47 minutes ago, Kane said:

I agree with dalmanitid, but I'll need to check my sources later on today to suss out which one. I know there was a newly erected genus (Glyptambon) in that area. I'm not saying it is that one, or Dalmanites, but we can keep those possibilities open for now. :) 

Thanks Kane!!!  I'll be checking on and off today (company coming) to see if your research provides anything different.

 

1 hour ago, fossilcrazy said:

The Cephalon looks like it would belong to a Dalmanites, or Odontochile.

Thanks fossilcrazy!!  My research hasn't done much so far.

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Kane

For now, have a look at this somewhat dated article: https://archive.org/details/newdevoniantrilo64roys

 

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Ruger9a
1 hour ago, piranha said:

 

 

 

The Devonian is absent in Kankakee so your first suggestion is correct.  An internal cast of Glyptambon verrucosus.

 

Holloway, D.J. 1981

Silurian Dalmanitacean Trilobites from North America and the Origins of the Dalmanitinae and Synphoriinae. Palaeontology, 24(4):695-731  PDF LINK

Thank you Scott!!!!!!  You've made my day...............

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