Peat Burns Posted April 23, 2018 Share Posted April 23, 2018 UPDATE: This could be Murchisonia sp. which has been recorded from the underlying Dundee Limestone and deposited in the Ohio State University Museum of Biological Diversity. Hello, I found a rare conispiral gastropod steinkern in the middle Devonian (Givetian) Silica Shale of Paulding, Ohio, last week. It's the first strongly conispiral gastropod I've ever found in the Middle Devonian (let-alone the Silica Shale). I looked through the FUMMP online database as well as the "Strata and Megafossils of the Middle Devonian Silica Formation" published by FUMMP and couldn't find any taxa that looked like this. It has the general shape of Paleozygopleura known from the Hamilton Group of New York. Is anyone aware of a snail with this general morphology that has been reported from the Silica Shale? Scale in mm. Link to comment Share on other sites More sharing options...
doushantuo Posted April 23, 2018 Share Posted April 23, 2018 Not even remotely an id<but : a palaeozygopleurid? edit: thus proving that I am a bad reader. Link to comment Share on other sites More sharing options...
Peat Burns Posted April 23, 2018 Author Share Posted April 23, 2018 58 minutes ago, doushantuo said: Not even remotely an id<but : a palaeozygopleurid? Thanks doushantuo, it sure has that general morphology as indicated in my initial post, but I just can't find any records from the Silica Shale. The older records only list 4 species of gastropods: Platyceras dumosum rarispina Platyceras bucculentum Platyceras carinatum Platystoma lineata (Btw, I think the genus name on some Platyceras has since been changed) A couple of tiny, less strongly conical taxa are included in the aforementioned book, but are not good matches. Maybe it's a new member of the Silica Shale fauna... (probably not, but it would be neat to be able to add one). Link to comment Share on other sites More sharing options...
doushantuo Posted April 23, 2018 Share Posted April 23, 2018 I think Bowsher did something with Platyceratids,taxonomically and ecologically speaking FYI(below,less than 2,5 Mb) Patterns_of_convergence_in_general_shell.pdf euh: reworked Morania/Medfrazyga?* *yes,"straws","clutching" 2 Link to comment Share on other sites More sharing options...
Peat Burns Posted April 23, 2018 Author Share Posted April 23, 2018 18 minutes ago, doushantuo said: I think Bowsher did something with Platyceratids,taxonomically and ecologically speaking FYI(below,less than 2,5 Mb) Patterns_of_convergence_in_general_shell.pdf Thank you. I think the Platyceras dumosum rarispina or Platyceras rarispina is now genus Spinyplatyceras. The rest, I think, are still Platyceras . Link to comment Share on other sites More sharing options...
doushantuo Posted April 23, 2018 Share Posted April 23, 2018 At the risk of offending you: bullgeosci841_1125.pdf UNDOUBTEDLY already in numerous libraries on this forum,coz CBG is free access 2 Link to comment Share on other sites More sharing options...
Peat Burns Posted April 23, 2018 Author Share Posted April 23, 2018 5 minutes ago, doushantuo said: At the risk of offending you: bullgeosci841_1125.pdf Not at all (why would I be offended?). Love the pics of the protoconchs. Link to comment Share on other sites More sharing options...
doushantuo Posted April 23, 2018 Share Posted April 23, 2018 Because i thought you would already be familiar with it 1 Link to comment Share on other sites More sharing options...
Peat Burns Posted April 23, 2018 Author Share Posted April 23, 2018 4 minutes ago, doushantuo said: Because i thought you would already be familiar with it Ah okay. Well now I take that as a compliment . I wish I had time to keep up with the Palaeozoic invertebrate zoology literature. It's hard enough to keep up with the literature in my own specialty! Link to comment Share on other sites More sharing options...
doushantuo Posted April 23, 2018 Share Posted April 23, 2018 yeah,know what you mean. 1 Link to comment Share on other sites More sharing options...
Peat Burns Posted April 23, 2018 Author Share Posted April 23, 2018 UPDATE: This could be Murchisonia sp. which has been recorded from the underlying Dundee Limestone and deposited in the Ohio State University Museum of Biological Diversity. 2 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted April 24, 2018 Share Posted April 24, 2018 Nice find. Most unusual. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Curt P Posted October 28, 2023 Share Posted October 28, 2023 I agree with Murchisonia from the Dundee Limestone. These are not uncommon in some higher unit(s) 1 Link to comment Share on other sites More sharing options...
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