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Some Pennsylvanian Trilobites From Kansas City


Missourian

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These are all Ameura missouriensis. For some reason the usually-more-common Ditomopyge is very rare here....

Three views of three enrolled bugs. The largest is from the Westerville Limestone. The other two are from the Winterset Limestone:

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post-6808-0-55011800-1403995121_thumb.jpg

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Context is critical.

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Flat Ameura. Probably Winterset Limestone:

post-6808-0-26211100-1403995233_thumb.jpg

Context is critical.

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Complete? Westerville Limestone:

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Almost complete. Westerville limestone again:

post-6808-0-51439300-1403995351_thumb.jpg

Context is critical.

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I wish this excellent large cephalon had the rest of the bug with it. Winterset Limestone:

post-6808-0-92263800-1403995408_thumb.jpg

Context is critical.

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Guess I'll have to look harder! :rolleyes:

Noting that your specimens are Westerville and Winterset (and knowing your fondness for Winterset), was there something about the environment or conditions when these strata were laid down that makes the preservation better, especially for more complete/intact specimens?

Steve

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Guess I'll have to look harder! :rolleyes:

Noting that your specimens are Westerville and Winterset (and knowing your fondness for Winterset), was there something about the environment or conditions when these strata were laid down that makes the preservation better, especially for more complete/intact specimens?

They are from either the oolitic/bioclastic shoals in the Winterset or Westerville or the bluish beds in the upper Winterset below the oolite. I'm still trying to sort out the environmental/depositional conditions, as you can imagine.... :)

Context is critical.

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And yes, I am fond of the Winterset for its fossils as well as its lithological diversity, paleoecological and depositional complexity, beauty, etc. :)

Context is critical.

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Very nice! I like that last one even tho it is just the cephalon.

That popped out with a single whack of the hammer. I held my breath for a moment.... :)

Context is critical.

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very nice! Late Paleozoic bugs are rare..awesome finds!

Thanks. It's been too long since I've found one.

Context is critical.

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Nice trilo's! Are these recent finds? Or a compilation from the years gone by? Either way, congrats on your beautiful collection.

Finding my way through life; one fossil at a time.

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Thanks everyone for the comments.

Nice trilo's! Are these recent finds? Or a compilation from the years gone by? Either way, congrats on your beautiful collection.

All were found 20+ years ago.

Some I found myself. Others were acquired from a friend/fellow hunter.

Context is critical.

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I have a few more Ameura pics floating around on the forum. I'll gather them here....

Close-up of eye on the large bug in Westerville matrix above (image 5):

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Two specimens from the Cement City Limestone:

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Close-up of cephalon:

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Edited by Missourian

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Great trilobites, Mitch! :wub:

Thanks for posting them.

They have classic lines to them - neat to look at.

Regards,

    Tim    -  VETERAN SHALE SPLITTER

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"In every walk with nature one receives far more than he seeks."

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