Tidgy's Dad Posted July 1, 2019 Share Posted July 1, 2019 Here we have a photo of a hash plate which has bits of bryozoa and crinoid ossicles, but is that a trilobite genal spine? The rock is Upper Ordovician Kope Formation or Fairview Formation. Economy, Southgate, McMicken, Mt.Hope or Fairmount members/formations if you like. Lawrenceburg Road cut, Indiana. Thanks all for looking. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Peat Burns Posted July 1, 2019 Share Posted July 1, 2019 I wonder if it's part of the librigena, lateral margin, and a "splintered" posterior border of a cephalon?. I've superimposed a pic of the above description of a Flexi next to yours as explanation. What do you think? Yours may not be a Flexi, but same concept... 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 1, 2019 Author Share Posted July 1, 2019 Thanks, my friend, yes, that's what I was thinking. Flexis do exist in this formation, but it looks a tad like Primaspis also. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted July 1, 2019 Share Posted July 1, 2019 In North America Primaspis is classified as Meadowtownella. Conway & Botting 2012 has a thorough explanation: Conway, T.M., Botting, J.P. 2012 Description and ecology of a new Middle Ordovician (Llanvirn) odontopleurid trilobite from the Builth Inlier of Mid-Wales, with a review of the genus Meadowtownella. Geological Magazine, 149(3):397-411 PDF LINK 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 1, 2019 Author Share Posted July 1, 2019 14 hours ago, piranha said: In North America Primaspis is classified as Meadowtownella. Conway & Botting 2012 has a thorough explanation: Conway, T.M., Botting, J.P. 2012 Description and ecology of a new Middle Ordovician (Llanvirn) odontopleurid trilobite from the Builth Inlier of Mid-Wales, with a review of the genus Meadowtownella. Geological Magazine, 149(3):397-411 PDF LINK You think it could be that ? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted July 1, 2019 Share Posted July 1, 2019 20 minutes ago, Tidgy's Dad said: You think it could be that ? Only posting the info for Meadowtownella ...I have no idea on the mystery fossil 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 2, 2019 Author Share Posted July 2, 2019 13 hours ago, piranha said: Only posting the info for Meadowtownella ...I have no idea on the mystery fossil Thank you very much for the information anyway. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
minnbuckeye Posted July 2, 2019 Share Posted July 2, 2019 Is that a piece of Isotelus below your trilo-bit?? 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted July 2, 2019 Author Share Posted July 2, 2019 3 minutes ago, minnbuckeye said: Is that a piece of Isotelus below your trilo-bit?? Not a clue. i'll try and get another photo Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 4, 2019 Author Share Posted November 4, 2019 On 7/2/2019 at 2:22 PM, minnbuckeye said: Is that a piece of Isotelus below your trilo-bit?? And, four months later........................... All sorts of smashed up bits in these pieces. Could the one below be a fragment of Meadowtownella also ? And something sort of bottom right? And at the top here : Hmmmm....... The crinoids here, judging from the columnals, seem to be possibly Iocrinus, Ectenocrinus and maybe Glyptocrinus but not Cincinnaticrinus. This would make this Fairview and not Kope Formation and thus these trlobits could be Ceraurus. ? Oooooh. Jusst found another bit on the reverse of the same rock. Scale in mm. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FossilDAWG Posted November 4, 2019 Share Posted November 4, 2019 Maybe bits of a Cryptolithus fringe? Don 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 4, 2019 Author Share Posted November 4, 2019 Thanks, Don. Maybe this one too? Though I think these are Fairview Fm. and there seems to be doubt that Cryptolithus goes beyond the Southgate Member of the Kope. But I'm not sure, these could be from the Kope, in which case my crinoid and bryozoan ids may be wrong. Which is quite possible. Sigh. Still, looking at these bits under the digital microscope is quite wonderful, even if i don't know what any of them are. Like this one. Hypostome or bit of broken brach? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 4, 2019 Author Share Posted November 4, 2019 Acidaspis may be a possibility for some of the bits too. I guess trilobits might have to be enough. I love 'em anyway. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FossilDAWG Posted November 4, 2019 Share Posted November 4, 2019 The first photo in the last set looks more like an odontopleurid free cheek to me. The last one does not resemble any hypostome I am familiar with. Maybe the processes on the inside of a brachiopod shell? Don 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 4, 2019 Author Share Posted November 4, 2019 31 minutes ago, FossilDAWG said: The first photo in the last set looks more like an odontopleurid free cheek to me. The last one does not resemble any hypostome I am familiar with. Maybe the processes on the inside of a brachiopod shell? Don Thanks again Yes, brachiopod process, I'm sure you're right I can see odontopleurid which would lean back towards Meadowtownella or Acidaspis, i guess Cheers Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
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