MarleysGh0st Posted October 14, 2013 Share Posted October 14, 2013 (edited) I've already posted one photo of this specimen in my trip report on the Museum of the Earth field trip to Jamesville Quarry (Jamesville, NY. Middle Devonian, Eifelian Age. Onondaga Formation, Nedrow Member.) This gastropod appears to be a Platyceras sp., similar to some of those shown in Plates 262-272 of Linsley's Devonian Paleontology of New York, but not quite matching any of those illustrations. Now that I've had the chance to extract the fossil from the matrix, I'm even more intrigued. The top of the fossil was almost fully exposed when I found it, so there weren't any surprises there: When it came loose from the matrix, though, I was surprised to see these radial lines inside the aperture: The figures in Linsley (from James Hall's works of 1862 and 1879) all show the aperture being plain or missing altogether. Have I found details that Hall never discovered? Here's one more photo, with a side view: The specimens that Hall illustrated show more curvature at the apex than my specimen, which seems fairly straight from this angle (with only a slight S-shaped curvature visible in the top/bottom views). Do we have any Devonian gastropod experts who can help me match this specimen to a species name? Edited October 14, 2013 by MarleysGh0st Link to comment Share on other sites More sharing options...
mikeymig Posted October 14, 2013 Share Posted October 14, 2013 Sorry buddy but it looks like a coral to me. mikey Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
JimB88 Posted October 14, 2013 Share Posted October 14, 2013 looks like a horn coral to me too. Platyceras didn't have striations or any embellishments on the shell. Link to comment Share on other sites More sharing options...
MarleysGh0st Posted October 14, 2013 Author Share Posted October 14, 2013 Oh. A horn coral with such a deep, concave bowl at what I was calling the aperture? Back to the reference works! Link to comment Share on other sites More sharing options...
Shamalama Posted October 15, 2013 Share Posted October 15, 2013 Looks like a Zaphrentis type horn coral. -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...
Uncle Siphuncle Posted October 15, 2013 Share Posted October 15, 2013 no shame. that's how we all learn to ID things. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
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