aek Posted December 13, 2016 Share Posted December 13, 2016 Trying to ID this cephalopod found in Silurian limestone in northern Illinois. My guess is it's a Spyroceras? In situ pic: Part of the cast glued together: Wavy lines in aquamarine colors and some pyritization/marcasite. I am clearly missing some pieces, but when fit together in the sarcophagus, it measures over 14". The entire cephalopod probably measured at least two feet or more, I'm guessing... Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 13, 2016 Share Posted December 13, 2016 Spyroceras was a Devonian genus of nautiloid - yours looks like Dawsonoceras, I think. IMAGES HERE. Neat find. Regards, 3 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...
FossilDAWG Posted December 13, 2016 Share Posted December 13, 2016 I agree with Dawsonoceras. What do you mean by "sarcophagous"? Don 1 Link to comment Share on other sites More sharing options...
aek Posted December 13, 2016 Author Share Posted December 13, 2016 1 hour ago, FossilDAWG said: I agree with Dawsonoceras. What do you mean by "sarcophagous"? Don It's just a description of mold and cast pieces that fit together like a stone "sarcophagus"... Link to comment Share on other sites More sharing options...
aek Posted December 13, 2016 Author Share Posted December 13, 2016 Thanks for the help, I really appreciate it! Link to comment Share on other sites More sharing options...
Max-fossils Posted December 13, 2016 Share Posted December 13, 2016 When I look up Dawsonoceras and Spyroceras, the first one proposed by Tim does indeed seem like a better option. I don't really know what else it could be, but one thing that I do know is that it is beautiful! Best regards, Max 1 Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
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