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D.N.FossilmanLithuania

Dear Guys, 

I recently found one small (5 mm width) and interesting specimen that can belong to primitive xiphosuran by the appearance of cephalothorax. 

It has not any jaws as trilobite and the preserved eye is merostomate like (not any small eyes but only protuberant area, similar to eurypterid or other chelicerate eyes).

The rick is found in Varena town, South Lithuania and the age should be about 475 million years.

Please help to confirm the primitive chelicerate if you could. :)  

 

Regards

Domas 

Xiphosurid early ordovician.JPG

xiphosurid early ordovician 2.jpg

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D.N.FossilmanLithuania

Dear JohnBrewer, thank you for better picture. :)

Do you agree with determination, or could it be something other?

 

Regards

Domas 

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From personal experience with eurypterids, my thought is that the preservation is wrong. This looks like a more substantial material to me.

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On 05/12/2017 at 6:51 AM, D.N.FossilmanLithuania said:

Dear JohnBrewer, thank you for better picture. :)

Do you agree with determination, or could it be something other?

 

Regards

Domas 

Hi Domas, I have no idea as it’s not something I collect. 

 

My pleasure to help with the images. :)

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Cowboy Paleontologist

I don't know, looks kind of trilobity to me...

It is hard to tell since it is such a small piece, but could it be a lobe from the glabella of a trilobite rather than an eye?  I am no expert by any stretch of the imagination, but that's what it reminds me of.

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Yup, looks like a trilo glabella part to me as well. 

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D.N.FossilmanLithuania

Thank you very much! :D

Maybe Nileus?? :)

 

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Definitely a trilobite cephalon.  Nileus is one possibility, but I don't see enough to exclude other bumastids.

 

Don

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