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FOSSIL FARMER

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Calling all lobster aficionados! I collected these lobsters from what I believe to be the baculites compressus zone/upper campanian Pierre shale in western South Dakota. I'm trying to get a specific ID for these fellas. I've read about Paleonephrops Browni and Linuparus Canadensis being found in my area, but neither really seems to fit with these. Please excuse my unfinished prep work on the double, it's still in progress.

 

 

 

 

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Thanks, I couldn't believe it when I pulled that double out of the hill. I looked hard for that missing tail with no luck though.

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Can't help with ID, but these are already nice looking not fully prepped. They'll look amazing and be an eye-catcher I'm sure

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Wow! These are beautiful! Thank for showing us!  :)

And Welcome to the Forum!  ;)

    Tim    -  VETERAN SHALE SPLITTER

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6 hours ago, Ivaldir said:

Can't help with ID, but these are already nice looking not fully prepped. They'll look amazing and be an eye-catcher I'm sure

Thanks, I think I'm done working on the single for fear of damaging it if I try to push further. Those tiny legs are ultra fragile and that particular concretion is extra hard. Prepping these has certainly been quite the learning experience compared to the ammonites that I usually find.

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2 hours ago, Fossildude19 said:

Wow! These are beautiful! Thank for showing us!  :)

And Welcome to the Forum!  ;)

Thank you! Glad to be here with some real fossil enthusiasts. 

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Wow, indeed.  What great fossils. Esp that double.  Nice prep work, but you are wise to not go any further. 

I can't help on the ID, but , just Wow!

 

   

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Fabulous find, I hope you find are able to get a positive ID for it.  Can you share what county this is from?

"There is no shortage of fossils. There is only a shortage of paleontologists to study them." - Larry Martin

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Maybe @PFOOLEY has some ideas on these. 

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“Not only is the universe stranger than we think, it is stranger than we can think” -Werner Heisenberg 

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2 hours ago, hadrosauridae said:

Fabulous find, I hope you find are able to get a positive ID for it.  Can you share what county this is from?

Thanks, I collected these in Pennington county.

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FOTM material? I haven't been spending a lot of time here of late, but what I have seen, as impressive as finds can be, these fossils are standouts. IIRC, it a fossil must be found during the present month for it to qualify. Regardless, those bugs...wait, trilobites are bugs in the world of fossils, are amazing!  I hope you show them here when you get the prep finished. So cool...Congratulations on the find.

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@MB

The human mind has the ability to believe anything is true.  -  JJ

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  • 2 weeks later...
On 5/15/2024 at 7:24 PM, Jared C said:

Maybe @PFOOLEY has some ideas on these. 

 

I do. :)

 

First of all, excellent crop of lobsters @FOSSIL FARMER

 

Feldmann, Bishop and Kammer (1977) described and illustrated Hoploparia bearpawensis from the Campanian of Montana...not the Pierre, but an equivalent and a good starting point for comparison. This species is from the Baculites eliasi zone, which makes it a bit younger than your specimens. Fatherree et al. (1988) mentions Hoploparia mickelsoni in the paper: Oxygen and carbon isotopic "dissection" of Baculites compressus (Mollusca: Cephalopoda) from the Pierre Shale (upper Campanian) of South Dakota; implications for paleoenvironmental reconstructions. I could not locate that paper but will continue to make the attempt to do so. I am very curious to see if that species is illustrated and how well it compares with your gems.

 

Feldmann, Bishop and Kammer (1977):

Macrurous_Decapods_from_the_Bearpaw_Shale_Cretaceous.pdf

 

 

 

 

EDIT: I found Gale Bishop's 1985 description of Hoploparia mickelsoni...

 

Fossil_decapod_crustaceans_from_the_Gamm.pdf

 

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image.png.d7dd86b87c056050691e4ae0eb9dc8e9.png

 

...might give you enough information to make a comparison with your specimens.

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"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

New Mexico Museum of Natural History Bulletins    

 

point.thumb.jpg.e8c20b9cd1882c9813380ade830e1f32.jpg research.jpg.932a4c776c9696d3cf6133084c2d9a84.jpg  RPV.jpg.d17a6f3deca931bfdce34e2a5f29511d.jpg  SJB.jpg.f032e0b315b0e335acf103408a762803.jpg  butterfly.jpg.71c7cc456dfbbae76f15995f00b221ff.jpg  Htoad.jpg.3d40423ae4f226cfcc7e0aba3b331565.jpg  library.jpg.56c23fbd183a19af79384c4b8c431757.jpg  OIP.jpg.163d5efffd320f70f956e9a53f9cd7db.jpg

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Thanks for the great info. I was leaning towards some type of hoploparia but as of yet I haven't found any that match up. It's been tough to dig up good info on these. I've got a couple more I'm still prepping that have more complete chelipeds, I'll get you a photo for reference when I get home.

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2 hours ago, FOSSIL FARMER said:

Thanks for the great info. I was leaning towards some type of hoploparia but as of yet I haven't found any that match up. It's been tough to dig up good info on these...

 

You are welcome. If you click on the book icon in my signature, I've stashed a bunch of literature regarding Hoploparia in the last post of that thread.

 

2 hours ago, FOSSIL FARMER said:

... I'll get you a photo for reference when I get home.

 

I look forward to seeing it. :)

"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

New Mexico Museum of Natural History Bulletins    

 

point.thumb.jpg.e8c20b9cd1882c9813380ade830e1f32.jpg research.jpg.932a4c776c9696d3cf6133084c2d9a84.jpg  RPV.jpg.d17a6f3deca931bfdce34e2a5f29511d.jpg  SJB.jpg.f032e0b315b0e335acf103408a762803.jpg  butterfly.jpg.71c7cc456dfbbae76f15995f00b221ff.jpg  Htoad.jpg.3d40423ae4f226cfcc7e0aba3b331565.jpg  library.jpg.56c23fbd183a19af79384c4b8c431757.jpg  OIP.jpg.163d5efffd320f70f956e9a53f9cd7db.jpg

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5 hours ago, PFOOLEY said:

 

You are welcome. If you click on the book icon in my signature, I've stashed a bunch of literature regarding Hoploparia in the last post of that thread.

 

 

I look forward to seeing it. :)

Here are those photos for you. This one has been on the back burner for a bit and is far from finished, so please excuse the rough appearance.

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Very informative read there. What I'm finding interesting is that unless I've misidentified the crabs I've collected, I'm in the dakoticancer assemblage with baculites compressus, and I also find didymoceras cheyennense in the same layer which should date it fairly accurately to 73-74 myo. These are the crabs, with just the one outlier that resembles the necrocarcinus from the paper.

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Occurrence and Fossilization of the Dakoticancer Assemblage, Upper Cretaceous Pierre Shale, South Dakota

Occurrence and fossilization of the Dakoticancer assemblage.pdf

 

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@MB

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"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

New Mexico Museum of Natural History Bulletins    

 

point.thumb.jpg.e8c20b9cd1882c9813380ade830e1f32.jpg research.jpg.932a4c776c9696d3cf6133084c2d9a84.jpg  RPV.jpg.d17a6f3deca931bfdce34e2a5f29511d.jpg  SJB.jpg.f032e0b315b0e335acf103408a762803.jpg  butterfly.jpg.71c7cc456dfbbae76f15995f00b221ff.jpg  Htoad.jpg.3d40423ae4f226cfcc7e0aba3b331565.jpg  library.jpg.56c23fbd183a19af79384c4b8c431757.jpg  OIP.jpg.163d5efffd320f70f956e9a53f9cd7db.jpg

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Really phenomenal info again, and I'm absolutely amazed that you're so familiar with these relevant research papers.

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