Some Pennsylvanian Phyllocarids

[Missourian]

Here in Kansas City, the phyllocarid Concavicaris can be found in various black shales.

A carapace from the Stark Shale in Jackson County, Missouri:

A carapace is the part of the crawdad you grab when you pick it up.

Another carapace, from the Eudora Shale in Platte County, Missouri:

Still another carapace, in a phosphatic concretion from the Muncie Creek Shale:

A telson (tail) from the Muncie Creek:

I'm not sure which side of the state line I found the nodules.

For those who are curious, here is the basic body plan of a phyllocarid shrimp:

[ckmerlin]

Hi nice specimens , there is some fine wrinkling on the bottom and top mine , the bottom wrinkling can be seen in the photos I attached size of mine is just over an inch , Im sending some photos to the National History Museum in London

The surface is very smooth and shiny in some places with thin dark lines running from top to bottom which are hard to see in photos

Im hoping it is this shrimp , but knowing my luck its not keeping my fingers crossed

Thanks for all your help .

Nice specimens in your photos by the way

[Missourian]

Yes, the presence of wrinkles and a shiny surface are good signs.

[pleecan]

Good to see Pennsylvanian phyllocarids... one of my favorite arthropods... I have found examples from Silurian and Mid Devonian.here in Ontario Canada.