KFof Posted May 9, 2016 Share Posted May 9, 2016 I broke this out of a very hard chunk of Osagean limestone from Lawrence County, MO. The top disintegrated, unfortunately. There was a hole in the rock about the size of a penny, which allowed my daughter to spot the fossil. But that meant it wasn't protected from weathering, and as a result parts of the top were the consistency of rust when we found it. It appeared that the septa originally converged to a nice point. Is this rugosa? And if so, what type? Link to comment Share on other sites More sharing options...
Auspex Posted May 9, 2016 Share Posted May 9, 2016 I think you are right; it appears to be an internal mold of the living end a solitary rugose coral. "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...
tmaier Posted May 9, 2016 Share Posted May 9, 2016 It might be a mold, or it might be just the way the coral eroded. I have one from Indiana that has a nice erosion that shows the internal structure of the specimen. Link to comment Share on other sites More sharing options...
Guguita2104 Posted May 9, 2016 Share Posted May 9, 2016 Nice coral! What's the age of the layers? If it's mesozoic you have a scleractinian solitary coral (also known as stony corals) and not a horn coral. Regards, Link to comment Share on other sites More sharing options...
Auspex Posted May 9, 2016 Share Posted May 9, 2016 ...What's the age of the layers?... Lower Carboniferous, I believe. "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...
doushantuo Posted May 9, 2016 Share Posted May 9, 2016 (edited) Osagean = middle tournaisian to lower Visean.Gnathodus typicus to Taphrognathus varians(pars),I believe.Now,if you found a Muensteroceras..... Edited May 9, 2016 by doushantuo 1 Link to comment Share on other sites More sharing options...
KFof Posted May 10, 2016 Author Share Posted May 10, 2016 The fossil was in a loose rock at the top of a quarry. Based on the probable origin of the stone, I imagine it's Visean. There are a couple quarries on the property, and they're not more than 25 ft deep, but according to my best resources (Missouri S&T's Geological Map of Missouri and the interactive USGS map) the Osagean formation is about 200 ft thick at this location. Link to comment Share on other sites More sharing options...
doushantuo Posted May 10, 2016 Share Posted May 10, 2016 (edited) if you want to know more about rugosa,i've got the lowdown. I'm wondering if that big s1 septum is an artefact of preservation? ***mutters someting about how difficult it is to determine Paleozoic corals*** https://www.researchgate.net/publication/225291611_Soft_body_reconstructions_of_Palaeozoic_corals_Implications_for_the_system_of_Anthozoa_Coelenterata readers who liked the above might also like : http://eprints2008.lib.hokudai.ac.jp/dspace/bitstream/2115/35933/1/11(4)_571-630.pdf Edited May 10, 2016 by doushantuo 1 Link to comment Share on other sites More sharing options...
KFof Posted May 10, 2016 Author Share Posted May 10, 2016 doushantuo, what a great resource! Thank you! I too wondered about the s1 you mentioned. I just came across this: http://www.lakeneosho.org/Miss7.html, which makes me think Auspex was right about the fossil being an internal mold. A number of the features of my fossil look like inversions of the Hapsiphyllum cassedayi specimen in the picture. In particular, I'm thinking the extra wide gap between two of the septa in the Hapsiphyllum might correspond with my fossil's s1 (pseudo-) septum. What do you think? Link to comment Share on other sites More sharing options...
doushantuo Posted May 10, 2016 Share Posted May 10, 2016 (edited) at the moment,nothing :"couldn't find DNS server" found this,though: http://research.nhm.org/pdfs/33225/33225-001.pdf edit:a nd WHERE IS PLATE 59? https://upload.wikimedia.org/wikipedia/commons/5/5f/Studies_in_the_Development_of_Certain_Paleozoic_Corals.pdf not overly fond of wikipedia Edited May 10, 2016 by doushantuo 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 10, 2016 Share Posted May 10, 2016 (edited) Better: http://onlinelibrary.wiley.com/doi/10.1111/1475-4983.00221/pdf?origin=publication_detail https://www.ideals.illinois.edu/bitstream/handle/2142/43024/coralsfromchoute97east.pdf?sequence=2 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.620.6802&rep=rep1&type=pdf Edited May 10, 2016 by doushantuo 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 11, 2016 Share Posted May 11, 2016 (edited) Cal Stevens: http://www.mdpi.com/2076-3263/2/2/42/pdf for remarks about this publisher,see "Cue cello riff" Edited May 11, 2016 by doushantuo Link to comment Share on other sites More sharing options...
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