minnbuckeye Posted April 13, 2019 Share Posted April 13, 2019 I have had this brachiopod for 2 years and would like to prep it out. It would be nice to know what it is first so I can envision how it sits in the matrix. Cedar Valley Formation?? 1 Link to comment Share on other sites More sharing options...
Peto Lithos Posted April 13, 2019 Share Posted April 13, 2019 Could this be an echinoid? I have never seen a brachiopod like that. Link to comment Share on other sites More sharing options...
FossilDAWG Posted April 13, 2019 Share Posted April 13, 2019 Not an echinoid. It's a productid or chonetid brachiopod I think. Unfortunately no name comes to mind. If it is from the Cedar Valley it should be in Stainbrook 1943 though I confess I don't see anything quite like it in that publication. Don Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 15, 2019 Author Share Posted April 15, 2019 @Peat Burns, @Tidgy's Dad, any thoughts? Chemical or physical prep?? Link to comment Share on other sites More sharing options...
Peat Burns Posted April 15, 2019 Share Posted April 15, 2019 12 minutes ago, minnbuckeye said: @Peat Burns, @Tidgy's Dad, any thoughts? Chemical or physical prep?? The only thing I've seen remotely like that in the Devonian is Spinatrypa. Perhaps it's that. I'm not familiar with the particular species of Spinatrypa out there, though. If it's in an organic-rich shale, KOH would work, but if there are any broken or cracked spines, they will dislodge and you'll have a humpty dumpty. I'd try a pin vice. It's a nice enough and unique enough specimen in which to invest some time. 1 Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 15, 2019 Author Share Posted April 15, 2019 @Peat Burns, I think you are correct!!!! Found this image. Mine looks like there are spines coming off all over the shell though, not just on the outer margin. Would they have lost them during prep or is this how it truly looks? Link to comment Share on other sites More sharing options...
Peat Burns Posted April 15, 2019 Share Posted April 15, 2019 9 hours ago, minnbuckeye said: @Peat Burns, I think you are correct!!!! Found this image. Mine looks like there are spines coming off all over the shell though, not just on the outer margin. Would they have lost them during prep or is this how it truly looks? You may also wish to compare with Hystricina. It has a deeper shell. Unfortunately, there are not a lot of photos showing them with spines. They are known from the Cedar Valley Group. Link to comment Share on other sites More sharing options...
Peat Burns Posted April 15, 2019 Share Posted April 15, 2019 3 minutes ago, minnbuckeye said: Would they have lost them during prep or is this how it truly looks? Spinatrypa have spines all over, but I don't think the ones on the body of the shell are as long as those on the margins. Link to comment Share on other sites More sharing options...
Peat Burns Posted April 15, 2019 Share Posted April 15, 2019 I think it is Hystricina / Spinatrypa trulla http://earthphysicsteaching.homestead.com/Hystricina_trulla__Middle_Devonian__Cedar_Valley_Formation__Independence__IA_B.jpg 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 15, 2019 Share Posted April 15, 2019 Gorgeous and interesting brachiopod. I'm with Tony on this one, I think very careful pin vice prepping is in order. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
minnbuckeye Posted April 15, 2019 Author Share Posted April 15, 2019 Thanks for the help @FossilDAWG, @Peat Burns, @Tidgy's Dad. May try to prep it today. IF it turns out, I will put up a picture! 2 Link to comment Share on other sites More sharing options...
Packy Posted April 25, 2019 Share Posted April 25, 2019 Could this be a part of a spiny platyceras gastropod, are the spines hollow? I would try sandblasting very slowly, just enough to see the shell. I did not think the spine holes went through the shell on a brach, but I could be wrong. Packy Link to comment Share on other sites More sharing options...
REW01 Posted April 26, 2019 Share Posted April 26, 2019 On 4/13/2019 at 3:34 PM, FossilDAWG said: Not an echinoid. It's a productid or chonetid brachiopod I think. Unfortunately no name comes to mind. If it is from the Cedar Valley it should be in Stainbrook 1943 though I confess I don't see anything quite like it in that publication. Don I agree; my first thought was productid. I'd love to see what it looks like prepped out! It might be more identifiable once prepped as well. Link to comment Share on other sites More sharing options...
Jackson g Posted April 26, 2019 Share Posted April 26, 2019 I would be afraid to prep it and lose any spines myself. I wish you luck in bringing better detail! Looking forward to seeing it if you decide to go further myself. Link to comment Share on other sites More sharing options...
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