BobWill Posted February 4, 2012 Share Posted February 4, 2012 Well....after being the first to suggest crinoid for this fossil in post #7 and then in post 44 telling Boneman007 that his reasoning for suggesting crinoid can't possibly be right...I saw this picture on fb from Crinoid Queen (hope she dosn't mind)...Help, I'm feeling dizzy!! Certainly a possibility, no? Link to comment Share on other sites More sharing options...
Roz Posted February 4, 2012 Author Share Posted February 4, 2012 Yes, it could be a possibility.. I see what you are getting at.. I am hoping that last section of the second nodule pops open soon.. It has a hairline fracture in it now and I think it won't be too long.. That would show what is at the very top. The first fossil hasn't opened further yet.. Welcome to the forum! Link to comment Share on other sites More sharing options...
Roz Posted February 5, 2012 Author Share Posted February 5, 2012 The second fossil on here had the last section of the nodule open.. First shot is the one I posted here before to give orientation where the last nodule section in relation to the fossil.. All the rest of the images are different views of the same section.. I don't know if this will help or not but I said I would post when it opened.. Welcome to the forum! Link to comment Share on other sites More sharing options...
BobWill Posted March 15, 2012 Share Posted March 15, 2012 I don't think it was considered whether this could be a Cirripede. Does anyone know of a Pennsylvanian version similar to the Cretaceous stalked barnacle Loricula darwini? It was composed of many small plates in series. Link to comment Share on other sites More sharing options...
Auspex Posted March 15, 2012 Share Posted March 15, 2012 Here is what I think I observe: it's shelly, and it's crushed. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Bullsnake Posted March 15, 2012 Share Posted March 15, 2012 No help here, but glad this is back. Been wondering! Steve Link to comment Share on other sites More sharing options...
richardfulton Posted March 17, 2012 Share Posted March 17, 2012 (edited) Often when I find Bactrites (classified midway between nautiloids and ammonites) in the Middle Devonian in Pa, they have often collapsed along a central suture that runs the length of the shell and could produce an effect similar to what you have. The chambers do not show well on the photo I have, but the collapse does. http://dixieflag.tri.../bactrites.html Bactrities is definitively chambered like a typical cepahlopod. The chambers just don't preserve well in this silty shale on Bactrites from this site (Deer Lake, Pa., and area). http://taxondiversity.fieldofscience.com/2011/01/bactritida.html <- Here is a Bactries showing the chambers. If you ran the suture up the center and collapsed it, you can imagine the similar affect it would produce as with yours. Edited March 17, 2012 by richardfulton Link to comment Share on other sites More sharing options...
Roz Posted March 17, 2012 Author Share Posted March 17, 2012 Often when I find Bactrites (classified midway between nautiloids and ammonites) in the Middle Devonian in Pa, they have often collapsed along a central suture that runs the length of the shell and could produce an effect similar to what you have. The chambers do not show well on the photo I have, but the collapse does. http://dixieflag.tri.../bactrites.html Bactrities is definitively chambered like a typical cepahlopod. The chambers just don't preserve well in this silty shale on Bactrites from this site (Deer Lake, Pa., and area). http://taxondiversit...bactritida.html <- Here is a Bactries showing the chambers. If you ran the suture up the center and collapsed it, you can imagine the similar affect it would produce as with yours. I think you may be onto something, Richard.. I really don't recall hearing much about Bactrites before but I did find an interesting pdf explaining the evolution of cephalopods.. In case any of you are interested.. A lot of information and I'll admit to some confusion after reading part of it.. http://rogov.zwz.ru/Spath,%201933.pdf Welcome to the forum! Link to comment Share on other sites More sharing options...
BobWill Posted March 18, 2012 Share Posted March 18, 2012 (edited) Often when I find Bactrites (classified midway between nautiloids and ammonites) in the Middle Devonian in Pa, they have often collapsed along a central suture that runs the length of the shell and could produce an effect similar to what you have. The chambers do not show well on the photo I have, but the collapse does. http://dixieflag.tri.../bactrites.html Bactrities is definitively chambered like a typical cepahlopod. The chambers just don't preserve well in this silty shale on Bactrites from this site (Deer Lake, Pa., and area). http://taxondiversit...bactritida.html <- Here is a Bactries showing the chambers. If you ran the suture up the center and collapsed it, you can imagine the similar affect it would produce as with yours. This makes more sense than seperate individual cepholopods but with 4 parts there would have to be 3 creases along the length. That's certainly a possibility but what about the apparent difference in the width of the chambers? Have you seen that in Bactrites outside of the gradual widening toward the aperture? Edited March 18, 2012 by BobWill Link to comment Share on other sites More sharing options...
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