truceburner Posted October 30, 2016 Share Posted October 30, 2016 Here's a little puzzler I found recently. Seems somewhat shell-like on one side, bumpy texture on the other. Shell or something else? Opinions appreciated. Link to comment Share on other sites More sharing options...
ashcraft Posted October 30, 2016 Share Posted October 30, 2016 Scute of some kind? Brent Ashcraft ashcraft, brent allen Link to comment Share on other sites More sharing options...
truceburner Posted October 31, 2016 Author Share Posted October 31, 2016 That crossed my mind, @ashcraft. Someone will be familiar with the texture. Could it be turtle? Link to comment Share on other sites More sharing options...
JohnJ Posted October 31, 2016 Share Posted October 31, 2016 Does the edge show any kind of laminated structure? I'm inclined to think this is a Cretaceous shell fragment with some kind of encrusting bryozoan on the opposite side. I don't see anything to make me think this a vertebrate fossil of any kind. 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
ynot Posted October 31, 2016 Share Posted October 31, 2016 I agree with John. Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted October 31, 2016 Share Posted October 31, 2016 7 hours ago, JohnJ said: Does the edge show any kind of laminated structure? I'm inclined to think this is a Cretaceous shell fragment with some kind of encrusting bryozoan on the opposite side. I don't see anything to make me think this a vertebrate fossil of any kind. Couldn't the bumpy texture also be a calcareous algae ? Link to comment Share on other sites More sharing options...
fifbrindacier Posted October 31, 2016 Share Posted October 31, 2016 I agree it looks to be a piece of shell, and, on the other face, maybe a stromatoporoid or another kind of sponge. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
truceburner Posted October 31, 2016 Author Share Posted October 31, 2016 20 hours ago, JohnJ said: Does the edge show any kind of laminated structure? I'm inclined to think this is a Cretaceous shell fragment with some kind of encrusting bryozoan on the opposite side. I don't see anything to make me think this a vertebrate fossil of any kind. No laminar structure discernible from the edge. Link to comment Share on other sites More sharing options...
abyssunder Posted October 31, 2016 Share Posted October 31, 2016 mamelons and astrorhizae ? http://palaeos.com/metazoa/porifera/stromatoporoidea.html " 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...
truceburner Posted October 31, 2016 Author Share Posted October 31, 2016 Link to comment Share on other sites More sharing options...
fifbrindacier Posted November 1, 2016 Share Posted November 1, 2016 16 hours ago, fifbrindacier said: I agree it looks to be a piece of shell, and, on the other face, maybe a stromatoporoid or another kind of sponge. 3 hours ago, abyssunder said: mamelons and astrorhizae ? http://palaeos.com/metazoa/porifera/stromatoporoidea.html I confirm, to me it is a stromatoporoidea. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Rockwood Posted November 1, 2016 Share Posted November 1, 2016 I think we all just got sent back to the proverbial drawing board ! Link to comment Share on other sites More sharing options...
Al Dente Posted November 1, 2016 Share Posted November 1, 2016 The bumpy surface reminds me of an ammonite aptychus. Not so sure the other side resembles one. Here is an aptychi from the Oceans of Kansas website- 13 Link to comment Share on other sites More sharing options...
abyssunder Posted November 1, 2016 Share Posted November 1, 2016 I could see that. A Spiny Aptychus from the Cretaceous of Kansas - Alfred G. Fischer and Robert O. Fay Here 9 " 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...
DPS Ammonite Posted November 1, 2016 Share Posted November 1, 2016 29 minutes ago, abyssunder said: I could see that. A Spiny Aptychus from the Cretaceous of Kansas - Alfred G. Fischer and Robert O. Fay Here Abyssunder nailed it. The fossil in questions looks like the inner and outer surface of the spiny Aptychus as shown in photos of A and B. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Carl Posted November 2, 2016 Share Posted November 2, 2016 Ooooh! Learned something cool! I'd never have been able to come up with aptychus. Must save this search image in my head... Great job, folks! 1 Link to comment Share on other sites More sharing options...
truceburner Posted November 3, 2016 Author Share Posted November 3, 2016 Oh my! Y'all have been busy solving this mystery! Thanks @Al Dente! More info on the unknown-to-me structure and it's purpose: http://www.sciencedirect.com/science/article/pii/S0016699514000023 1 Link to comment Share on other sites More sharing options...
truceburner Posted November 3, 2016 Author Share Posted November 3, 2016 For me, image 'd' in @abyssunder's post settles it. The little dots at the top of the bumps are visible with a loupe. So cool! Thanks all. Link to comment Share on other sites More sharing options...
doushantuo Posted November 3, 2016 Share Posted November 3, 2016 parentwestermammonitmolluscgeobios3-main.pdf 1 Link to comment Share on other sites More sharing options...
doushantuo Posted November 3, 2016 Share Posted November 3, 2016 I suggest googling the names Kruta,Seilacher,Farinacci,Schweigert,Lomax,Reboulet,Tamaba and Turek. E.g.: http://www.geo.fu-berlin.de/geol/fachrichtungen/pal/eigenproduktion/Band_10/21_Schweigert.pdf And:Fruitbat's Library.,on this very forum,prabably has loads on aptychi some Tanabe: Tanabe 2012aptych (N Jb Geol Palaont Abh).pdf Link to comment Share on other sites More sharing options...
doushantuo Posted November 3, 2016 Share Posted November 3, 2016 Aptychi in core: http://www.deepseadrilling.org/41/volume/dsdp41_07.pdf rhyncholites: http://www.zobodat.at/pdf/ANNA_112A_0627-0658.pdf and lest i forget,Kudo's to Al Dente Link to comment Share on other sites More sharing options...
fifbrindacier Posted November 3, 2016 Share Posted November 3, 2016 Good ID Al Dente. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
fossiling Posted November 5, 2016 Share Posted November 5, 2016 On Thursday, November 03, 2016 at 10:55 AM, doushantuo said: I suggest googling the names Kruta,Seilacher,Farinacci,Schweigert,Lomax,Reboulet,Tamaba and Turek. E.g.: http://www.geo.fu-berlin.de/geol/fachrichtungen/pal/eigenproduktion/Band_10/21_Schweigert.pdf And:Fruitbat's Library.,on this very forum,prabably has loads on aptychi some Tanabe: Tanabe 2012aptych (N Jb Geol Palaont Abh).pdf i've been searching for this legendary pdf library . Do you have a link? Keep looking! They're everywhere! Link to comment Share on other sites More sharing options...
doushantuo Posted November 5, 2016 Share Posted November 5, 2016 yes,but the simplest thing would be to go to "Documents". Link to comment Share on other sites More sharing options...
truceburner Posted December 8, 2016 Author Share Posted December 8, 2016 I found two more partial Ammonite aptychi today, on the left and right in this picture, original specimen at center. Glad to know what they are now. Link to comment Share on other sites More sharing options...
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