Doug Von Gausig Posted February 9, 2021 Share Posted February 9, 2021 I run across these guys frequently in the Mississippian Redwall Limestones around Arizona's Verde Valley. They are generally accompanied by lots of Crinoids and solitary Rugose Corals. They're always this oval shape with segmented structure. They look like an isopod, to me, but could be some other crustacean. Any help out there for the identification of these "bugs?" Link to comment Share on other sites More sharing options...
IsaacTheFossilMan Posted February 9, 2021 Share Posted February 9, 2021 I'm personally not seeing anything organic. Is it crystalline? Also, if you could, attach some pictures of the other ones you've found, it could really help! Edit: I'm not very knowledgeable with isopods, so, by all means, veto this comment! ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
oilshale Posted February 9, 2021 Share Posted February 9, 2021 I would also lean towards isopod. You might ask George D.F Wilson. He will know. Thomas Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
LabRatKing Posted February 9, 2021 Share Posted February 9, 2021 Not enough visible to be truly diagnostic, but an isopod may be likely, though the conspecifics described may indicate juvenile trilobites, or even more likely something akin to modern Chitons. however, the slight serrations visible in some views indicate crinoid columnals fractured as an angular cross section to me. 1 Link to comment Share on other sites More sharing options...
oilshale Posted February 9, 2021 Share Posted February 9, 2021 17 minutes ago, LabRatKing said: ....however, the slight serrations visible in some views indicate crinoid columnals fractured as an angular cross section to me. Could also be. 1 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
jdp Posted February 9, 2021 Share Posted February 9, 2021 that was my thought. Link to comment Share on other sites More sharing options...
Packy Posted February 13, 2021 Share Posted February 13, 2021 It looks like there are irregular lines between each section, it coild be a crinoid stem section broken on a angle. Packy Link to comment Share on other sites More sharing options...
erose Posted February 13, 2021 Share Posted February 13, 2021 Yeah, Think this is a crinoid column section in cross section as well... Link to comment Share on other sites More sharing options...
Phevo Posted February 13, 2021 Share Posted February 13, 2021 On 9.2.2021 at 3:09 PM, Doug Von Gausig said: I run across these guys frequently in the Mississippian Redwall Limestones around Arizona's Verde Valley. They are generally accompanied by lots of Crinoids and solitary Rugose Corals. They're always this oval shape with segmented structure. They look like an isopod, to me, but could be some other crustacean. Any help out there for the identification of these "bugs?" Usually you can see the "crabby" texture if it is an isopod, hope the picture inserted is good enough to give an idea, this is Palaega Danica from northern Jutland in Denmark Link to comment Share on other sites More sharing options...
Doug Von Gausig Posted February 13, 2021 Author Share Posted February 13, 2021 I can see the pores in the photo you posted, but my critter is not in as good a state of preservation to show these. I am leaning more and more toward crinoid stem seen obliquely. Thanks! Link to comment Share on other sites More sharing options...
Doug Von Gausig Posted February 13, 2021 Author Share Posted February 13, 2021 On 2/9/2021 at 2:30 PM, LabRatKing said: Not enough visible to be truly diagnostic, but an isopod may be likely, though the conspecifics described may indicate juvenile trilobites, or even more likely something akin to modern Chitons. however, the slight serrations visible in some views indicate crinoid columnals fractured as an angular cross section to me. I'm leaning more in that direction, and thanks! 1 Link to comment Share on other sites More sharing options...
Doug Von Gausig Posted February 13, 2021 Author Share Posted February 13, 2021 3 hours ago, Packy said: It looks like there are irregular lines between each section, it coild be a crinoid stem section broken on a angle. Packy Yeah, I'm thinking you're right, Packy. Thanks! Link to comment Share on other sites More sharing options...
ClearLake Posted February 14, 2021 Share Posted February 14, 2021 When I saw the first picture, my initial reaction was: it’s a polyplacophoran (chiton)! Which would be really cool as they are relatively rare, especially as articulated fossils. It had a nice rounded head valve, the correct number of intermediate valves, very neat. And then I looked at the second picture and closer at both of then and sadly (for me) I have to agree with the others, they look like fractured crinoid cross sections. Interesting none the less. Link to comment Share on other sites More sharing options...
IsaacTheFossilMan Posted February 14, 2021 Share Posted February 14, 2021 Upon further inspection, yes, I was wrong with the "inorganic" comment. Crinoid columnal, agreed. ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
Ernest H. Williams, Jr. Posted January 26, 2022 Share Posted January 26, 2022 The segments do not look like an isopod. Link to comment Share on other sites More sharing options...
Ludwigia Posted January 26, 2022 Share Posted January 26, 2022 14 hours ago, Ernest H. Williams, Jr. said: The segments do not look like an isopod. This was clear months ago. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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