Jeffrey P Posted September 10, 2013 Share Posted September 10, 2013 (edited) Acrospirifer arreutus, a Lower Devonian brachiopod preserved in silica, very abundant in the Glenerie Limestone exposed in a roadcut along Route 9W north of Kingston, NY. Edited September 10, 2013 by Jeffrey P Link to comment Share on other sites More sharing options...
Auspex Posted September 10, 2013 Share Posted September 10, 2013 As I mentioned in your other Glenerie Brachiopod topic, I like these both-sides matrix-free specimens. "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...
Shamalama Posted September 10, 2013 Share Posted September 10, 2013 (edited) Aerospirifer... that is a new one for me! Thanks for posting all these guys. Reminds me of the Macropleura I found in the Licking Creek formation in Virginia. Edited September 10, 2013 by Shamalama -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...
Jeffrey P Posted September 10, 2013 Author Share Posted September 10, 2013 Sorry, My error. It is actually Acrospirifer. I used David M. Linsley's Devonian Paleontology of New York as a reference. It features copies of lithographs from James Hall's thirteen volume Paleontology, published between 1847 and 1894. It is my understanding that some species names have changed in the past hundred years and so these id's are preliminary at best. Linsley's book is available free online. Anyone interested in Devonian brachiopods, mollusks, and trilobites should own it. Link to comment Share on other sites More sharing options...
MarleysGh0st Posted September 10, 2013 Share Posted September 10, 2013 Linsley's book is a great reference for New York fossils. If you want to go back to the source material, the Hall volumes are available online through Google Books. You can consult the species list starting on page 71 of Linsley to see which volume is the source for a particular plate. For Acrospirifer arrectus, the text is in Hall, 1859 (p. 422-424) and the plates are in Hall, 1861 (Plate 97). When Linsley gives several figures for the same species, I find it helpful to read the descriptions in Hall to see what the difference is between the figures. Hall called this species Spirifer arrectus. According to the Paleontology Database, Acrospirifer is still a valid genus, but they don't have an entry for this particular species, so I'm not sure about that. Link to comment Share on other sites More sharing options...
Jeffrey P Posted September 10, 2013 Author Share Posted September 10, 2013 Thank you for the references. I'm sure they'll prove useful in the future. Link to comment Share on other sites More sharing options...
hitekmastr Posted September 14, 2013 Share Posted September 14, 2013 Nice finds for a roadcut site. The triangular shaped shell in the upper right corner is very interesting. Congratulations. Link to comment Share on other sites More sharing options...
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