What are these?

[eppingera]

Hi all! Found this split in half on a creek bank. Any ideas on what they could be? My first thought was trilobites but I doubt that's correct...

 

[unclemac]

underside of one perhaps?

 

[eppingera]

underside of one perhaps?

Could be, that's what I was thinking as well!

 

[Jason in Enid]

That's a trilobite alright, but it looks like something has messed up the head.

 

[Charlie P. (NY)]

Not a trilobite. Head, thorax, tail: three parts. This fossil has no central ridge, no glabellar lobe.

The Trilobites

 

[eppingera]

Not a trilobite. Head, thorax, tail: three parts. This fossil has no central ridge, no glabellar lobe.

The Trilobites

Hmmm okay you make a good point! Any guesses as to what it may be?

 

[GatorBoy]

First..where was it found?
And can you give a size reference or measurement?
There is at least one other one next to it..or.. these are multiple parts of what appears to be the underside of one organism.
I belive I see something encasing it..or them.
Large barnacle type creature?

 

[GatorBoy]

I think I'm seeing something like this

 

[unclemac]

this person will know....Liz Nesbitt, Curator, Invertebrate & Micropaleontology

lnesbitt@uw.edu

 

[eppingera]

First..where was it found?
And can you give a size reference or measurement?
There is at least one other one next to it..or.. these are multiple parts of what appears to be the underside of one organism.
I belive I see something encasing it..or them.
Large barnacle type creature?

Found in Grindstone creek, Boone county Mo. There are 2 of them; the one with the hole is about 2", the other is about 2 1/2" . There is a white halo around them. Complete with the halo area the larger one is ~ 3 1/2". The shape is right on that critter but I don't see any of the horizontal bands that these have...

 

[eppingera]

this person will know....Liz Nesbitt, Curator, Invertebrate & Micropaleontology

lnesbitt@uw.edu

Okay thanks for the source! I'll send her some pics...

 

[rickn1]

Not sure , but verrry nice.

 

[unclemac]

Okay thanks for the source! I'll send her some pics...

let us know...

 

[Jason in Enid]

Maybe you have some proto-trilobite never seen before.

 

[eppingera]

Maybe you have some proto-trilobite never seen before.

Ha! Maybe they will name it after me! My great grandpa has fossils named after him...