Jeffrey P Posted November 4, 2014 Share Posted November 4, 2014 (edited) Found this specimen on Sunday at Soule Road Quarry in Pierceville, NY, in Madison County. Not sure if it's an ammonoid (goniatite) or a gastropod (Platystoma). It was found in the Upper Ludlowville Formation, It is Middle Devonian. Please share your ideas. Thank you. Edited November 4, 2014 by Jeffrey P Link to comment Share on other sites More sharing options...
Ludwigia Posted November 4, 2014 Share Posted November 4, 2014 The photo's slightly fuzzy, but I'll go with gastropod. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Rockwood Posted November 4, 2014 Share Posted November 4, 2014 Second that. There seems to be shell left near the apex with no sign of septa or suture. Link to comment Share on other sites More sharing options...
Fossildude19 Posted November 4, 2014 Share Posted November 4, 2014 Nice one, Jeff. I think it's a gastropod as well. Regards, 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...
Jeffrey P Posted November 4, 2014 Author Share Posted November 4, 2014 Thanks guys. I was leaning in the same direction. This is the first Platystoma gastropod I've found in Madison County. The species list continues to grow. Link to comment Share on other sites More sharing options...
Shamalama Posted November 4, 2014 Share Posted November 4, 2014 The key feature is that the spiral "rises" from the center of the shell. In Gonaitites and ammonoids the spiral is imbricated so that the younger sections overlap the older. Of course this does not apply to heteromorphs. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
erose Posted November 4, 2014 Share Posted November 4, 2014 (edited) That's the kind of fossil that often requires a few more specimens from the same site to get a better handle on the ID. Even partials can have diagnostic features and it may take a handful to get a feel for the entire creature. But I do agree it seems much closer to gastropod in nature. Edited November 4, 2014 by erose Link to comment Share on other sites More sharing options...
tmaier Posted November 4, 2014 Share Posted November 4, 2014 A peek at the backside would be very informative. Link to comment Share on other sites More sharing options...
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