KCMOfossil Posted June 21, 2017 Share Posted June 21, 2017 This item is 6.5 x 2.5 mm. It is from the Middle Creek Member of the Kansas City Group (Pennsylvanian Subsystem) and was found in conjunction with crinoid pieces, brachiopods, bryozoans, and horn coral. Any ID help will be appreciated. Russ Front: Back: Back with measurement: Left side: Right side: Top (tip): Bottom (tip): Link to comment Share on other sites More sharing options...
BobWill Posted June 21, 2017 Share Posted June 21, 2017 Does anyone ever find bits of shark cartilage there? Link to comment Share on other sites More sharing options...
Herb Posted June 22, 2017 Share Posted June 22, 2017 weathered Archimedes ? "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
KCMOfossil Posted June 22, 2017 Author Share Posted June 22, 2017 BobWill, I'm not sure if shark cartilage is found there or not. Perhaps someone else will know. Hank, thanks for the suggestion. I can see what you mean, especially in the first two pictures where a spiral line is evident. Russ Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 22, 2017 Share Posted June 22, 2017 @Missourian 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 22, 2017 Share Posted June 22, 2017 It looks like an element (part of pyramid?) from an echinoid Aristotle's lantern, maybe Archaeocidaris. EDIT: I think it's an epiphysis, see posts further down. Tarquin Link to comment Share on other sites More sharing options...
Coco Posted June 22, 2017 Share Posted June 22, 2017 I don't think it comes from a sea urchin Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 Here's one from my own collection that looks similar, an Archaeocidaris lantern epiphysis (attached to another bit) (identified for me by a specialist). Tarquin Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 Here's my Archaeocidaris epiphysis image flipped for comparison with Russ's: Tarquin Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 22, 2017 Share Posted June 22, 2017 It does look like a close match. 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...
Al Dente Posted June 22, 2017 Share Posted June 22, 2017 TqB beat me to it. Here's a lantern epiphysis from Ohio. This is from the publication "Echinoid Remains from the Pennsylvanian Vanport Limetone Ohio". Link to comment Share on other sites More sharing options...
doushantuo Posted June 22, 2017 Share Posted June 22, 2017 Stock: Link to comment Share on other sites More sharing options...
doushantuo Posted June 22, 2017 Share Posted June 22, 2017 a very educational thread.!! Link to comment Share on other sites More sharing options...
doushantuo Posted June 22, 2017 Share Posted June 22, 2017 still from the same article by Markel (maerkel/diacritic-umlaut on the a)the GOM of echinoid dentition: Link to comment Share on other sites More sharing options...
doushantuo Posted June 22, 2017 Share Posted June 22, 2017 Scarpa: before there were computers and 3d models,there was hands-on analog modelling: Link to comment Share on other sites More sharing options...
KCMOfossil Posted June 22, 2017 Author Share Posted June 22, 2017 2 hours ago, TqB said: Archaeocidaris lantern epiphysis Thanks. This looks like a match to me. The matrix and fauna in your picture are very similar to the Middle Creek, so the context fits well. Russ Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 9 minutes ago, KCMOfossil said: Thanks. This looks like a match to me. The matrix and fauna in your picture are very similar to the Middle Creek, so the context fits well. Russ Good, look out for Archaeocidaris teeth too. Tarquin Link to comment Share on other sites More sharing options...
Coco Posted June 22, 2017 Share Posted June 22, 2017 OK, it seems to be from a sea urchin. Is someone could tell me the exact place of this piece in Aristotle's lantern please ? Is it the "r" and "c" part on the right drawing put by Al Dente ? Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 30 minutes ago, Coco said: OK, it seems to be from a sea urchin. Is someone could tell me the exact place of this piece in Aristotle's lantern please ? Is it the "r" and "c" part on the right drawing put by Al Dente ? Coco Hi Coco, It's the "e" in all three drawings, clearest on the left. It attaches around the demi-pyramid and often becomes detached. Tarquin Link to comment Share on other sites More sharing options...
KCMOfossil Posted June 22, 2017 Author Share Posted June 22, 2017 39 minutes ago, Coco said: the exact place of this piece in Aristotle's lantern Here is a another helpful explanation and view of the lantern, although an exploded view is needed to really show the epiphysis. Russ Link to comment Share on other sites More sharing options...
KCMOfossil Posted June 22, 2017 Author Share Posted June 22, 2017 5 hours ago, TqB said: Good, look out for Archaeocidaris teeth too. I certainly will. I found this picture put up by JohnJ in an earlier thread. It seems to show the tip of the tooth. What does the entire tooth look like? Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 26 minutes ago, KCMOfossil said: I certainly will. I found this picture put up by JohnJ in an earlier thread. It seems to show the tip of the tooth. What does the entire tooth look like? I posted a few on this thread (from the same slab as the epiphysis) - worth looking down to the bottom as a couple of the best specimens are there. http://www.thefossilforum.com/index.php?/topic/65304-archaeocidaris-teeth-and-other-bits-uk/#comment-683500 (Sorry it's all thumbnails you'll need to click on.) Tarquin Link to comment Share on other sites More sharing options...
KCMOfossil Posted June 22, 2017 Author Share Posted June 22, 2017 31 minutes ago, TqB said: I posted a few on this thread (from the same slab as the epiphysis) - worth looking down to the bottom as a couple of the best specimens are there. http://www.thefossilforum.com/index.php?/topic/65304-archaeocidaris-teeth-and-other-bits-uk/#comment-683500 This was just what I needed. Thanks. Your images are clear and helpful. As a matter of fact, based on them I was able to identify a 7 x 3 mm item from the same material as the epiphysis, and unless I am mistaken, it is an Archaeocidaris tooth. Link to comment Share on other sites More sharing options...
TqB Posted June 22, 2017 Share Posted June 22, 2017 31 minutes ago, KCMOfossil said: This was just what I needed. Thanks. Your images are clear and helpful. As a matter of fact, based on them I was able to identify a 7 x 3 mm item from the same material as the epiphysis, and unless I am mistaken, it is an Archaeocidaris tooth. That looks spot on, nice find and photos! Tarquin Link to comment Share on other sites More sharing options...
fifbrindacier Posted June 22, 2017 Share Posted June 22, 2017 Very interesting thread, i didn't know the Lantern or Aristote could look like that. "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...
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