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Ordovician ID

Nimravis

By Nimravis
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Nimravis Regular Member

Nimravis

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On Sunday I went to a road cut in Ogle County, Illinois that exposes the Middle Ordovician, Platteville Group / Miffin member fossils. The below piece is something that I am having trouble identifying. Per @minnbuckeye request, I hope that these pictures are better. Any help with an ID would be appreciated.

 

IMG_1751.thumb.jpg.131ae08461db4b116b9060ad7a6bb04e.jpgIMG_1752.thumb.jpg.dae17cbd571cbd3572df59610de466b3.jpgIMG_1753.thumb.jpg.21d02ef652507adfa348a42d093fc7ae.jpgIMG_1754.thumb.jpg.4fee1216155e945b1a0c958de4730fb3.jpg

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fifbrindacier Regular Member

fifbrindacier

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An echinoderm ?

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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fifbrindacier Regular Member

fifbrindacier

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For comparison, here is a photo i found on the net which shows a Diploporitan echinoderm, Holocystites salmoensis, from the upper Ordovician of Anticosti Island of Quebec.

Link : https://timescavengers.blog/category/published/page/16/

download.jpg.dbdf2d098d5480a41989b5bb877b1144.jpg

@Coco, @caterpillar ?

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theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Coco Regular Member

Coco

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Hi,

 

Sorry, This fossil is too old to permit me to help you in an ID.

 

Coco

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----------------------
OUTIL POUR MESURER VOS FOSSILES : ici

Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici
Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici
Mâchoires sélaciennes récentes : ici
Hétérodontiques et sélaciens : ici
Oeufs sélaciens récents : ici
Otolithes de poissons récents ! ici

Un Greg...

Badges-IPFOTH.jpg.f4a8635cda47a3cc506743a8aabce700.jpg Badges-MOTM.jpg.461001e1a9db5dc29ca1c07a041a1a86.jpg

 

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Johannes Regular Member

Johannes

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I think it is a cephalodod fragment with a hollow siphuncle. The structure inside is interesting, I have seen similar structures and have interpreted them as a kind of mineralized algae or fungal structures...

 

Thank you for sharing!

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