paleoman1234 Posted June 3, 2018 Share Posted June 3, 2018 Trilobite or worm trail? Or something else? Found near red river gorge in Kentucky. Size: 5" x 3.5" x .5" Link to comment Share on other sites More sharing options...
Spinosaurus Posted June 3, 2018 Share Posted June 3, 2018 crinoids? 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 3, 2018 Share Posted June 3, 2018 Looks like very worn crinoid stem imprints to me. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
TqB Posted June 3, 2018 Share Posted June 3, 2018 I'm not convinced by crinoids, they look rather uneven. Maybe this sort of thing (which has been shown a few times on the forum. I'm afraid I can't remember the original source - I tried searching and Tim showed it a few years ago. ): 6 Tarquin Link to comment Share on other sites More sharing options...
Spongy Joe Posted June 3, 2018 Share Posted June 3, 2018 I'm with Tarquin here - some sort of trace fossil. The giveaway is in the upper middle, where it goes underneath a layer of sandier matrix. There's certainly no crinoid, or cornulitid tube (I wondered for a minute!), or coal (I also wondered at eroded moulds of lycopod branches)... it's just an impression. Splitting off the remainder of that layer may show more detail. 1 Link to comment Share on other sites More sharing options...
indominus rex Posted June 3, 2018 Share Posted June 3, 2018 I agree. It looks more like trace fossils than crinoids. I think trilobite but I could be completely wrong. Let's see what the experts say Life started in the ocean. And so did my interest in fossils. Link to comment Share on other sites More sharing options...
Rockwood Posted June 3, 2018 Share Posted June 3, 2018 Trace fossils indeed. I would expect a greater degree of duality and more feather like marks by the appendages of trilobites though. Link to comment Share on other sites More sharing options...
piranha Posted June 3, 2018 Share Posted June 3, 2018 Scalarituba missouriensis is a prolific trace fossil in the Mississippian of Kentucky: figure from: Conkin, J.E., & Conkin, B.M. 1968 Scalarituba missouriensis and its stratigraphic distribution. The University of Kansas Paleontological Contributions, 31:1-7 PDF LINK 3 Link to comment Share on other sites More sharing options...
Paleome Posted August 18, 2021 Share Posted August 18, 2021 On 6/3/2018 at 4:01 AM, TqB said: I'm not convinced by crinoids, they look rather uneven. Maybe this sort of thing (which has been shown a few times on the forum. I'm afraid I can't remember the original source - I tried searching and Tim showed it a few years ago. ): I would like to find the source of this ichnological presentation. Can anyone help? Paleome Link to comment Share on other sites More sharing options...
piranha Posted August 18, 2021 Share Posted August 18, 2021 11 minutes ago, Paleome said: I would like to find the source of this ichnological presentation. Can anyone help? Paleome Smith, J.J., Hasiotis, S.T., Kraus, M.J., Woody, D.T. 2008 Naktodemasis bowni: New Ichnogenus and Ichnospecies for Adhesive Meniscate Burrows (AMB), and Paleoenvironmental Implications, Paleogene Willwood Formation, Bighorn Basin, Wyoming. Journal of Paleontology, 82(2):267-278 PDF LINK 1 Link to comment Share on other sites More sharing options...
TqB Posted August 18, 2021 Share Posted August 18, 2021 (edited) 13 minutes ago, Paleome said: I would like to find the source of this ichnological presentation. Can anyone help? Paleome It's here, on p.274 Naktodemasis bowni EDIT: Piranha just beat me! Edited August 18, 2021 by TqB 1 Tarquin Link to comment Share on other sites More sharing options...
abyssunder Posted August 18, 2021 Share Posted August 18, 2021 For the O.P., it looks close to Taenidium isp. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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