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Some Eurypterids From Knob Noster, Missouri


Missourian

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Adelophthalmus sp.

Pennsylvanian

Upper Cherokee Group

Knob Noster, Missouri

A nearly complete juvenile:

post-6808-0-82205700-1324287404_thumb.jpg

A ventral view showing leg attachments:

post-6808-0-89085200-1325838446_thumb.jpg

Dorsal view:

post-6808-0-53840600-1325838626_thumb.jpg

Dorsal view again. Some of these nodules are hollow in the center, leaving the fossil suspended in the open space:

post-6808-0-19074000-1325838489_thumb.jpg

A body missing head and tail:

post-6808-0-44081300-1325838796_thumb.jpg

It's really too bad this nodule was found incomplete:

post-6808-0-90657000-1325838828_thumb.jpg

A large telson?:

post-6808-0-25258500-1325838926_thumb.jpg

A leg of a large individual:

post-6808-0-10042800-1325839007_thumb.jpg

A big segment:

post-6808-0-86820700-1325839067_thumb.jpg

The counterpart of the segment above, showing some fine detail:

post-6808-0-95829400-1325839080_thumb.jpg

Many more segments:

post-6808-0-59470500-1325839139_thumb.jpg

Edited by Missourian
  • Enjoyed 2

Context is critical.

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Wow! Excellent collection.

I've done my share of Mazon Creek collecting, and have seen papers on the nodules of MO/KS/OK, but have only seen a few of the fossils themselves, and mostly here on TFF.

Thanks for sharing (I'd love to see more)!

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I had no idea that the Eurypterids ranged up into the Pennsylvanian. Very cool fossils!

-Dave

__________________________________________________

Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPhee

If I'm going to drive safely, I can't do geology. - John McPhee

Check out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/

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You have been holding out, Missourian.. :P Those are fantastic! eat%20popcorn.gif

I have always found those very intriguing.. I am not sure if any have been found

in Texas.. So that's upper Pennsylvanian?

Welcome to the forum!

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Ok missourian...every post of yours is something I look forward to! Awesome!

Those are great candidates for FOTM!!!

Edited by grokfish
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Thanks all for the comments.

I didn't find them myself, but I was able to obtain many nodules soon after the site was discovered.

Eurypterids can be found throughout the Pennsylvanian. For some reason, these fossil-bearing siderite concretions tend to be limited to the mid-Penn Demoinesian. As eurypterids are mostly non-marine, I figure that any plant-bearing deposit has the potential of producing one or more (though they would be frustratingly rare).

Context is critical.

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  • 2 months later...

Great fossils! Congratulations on such an amazing collection of specimens.

"They ... savoured the strange warm glow of being much more ignorant than ordinary people, who were only ignorant of ordinary things."

-- Terry Pratchett

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  • 9 years later...

First I have heard of eurypterids from Missouri (saw one for sale on online).  What is the current status of these specimens? Are they in or headed to a museum? 

 

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