I_gotta_rock Posted August 17, 2017 Share Posted August 17, 2017 Okay, here's a real stumper. I have five specimens of this shell species, all collected on the beach at Matoaka Cabins, but on various trips. They are all about the same proportions, and all irregular shaped, but with the same growth rings and what looks like maybe attachment area. So far, I have looked in Glenn's 1904 volumes, Vokes, Peteuch, Ward, The Calvert Marine Museum web site, a book on Delaware Miocene fossils, and the FF Facebook page. It shouldn't be that hard if I have five of them! Anyone have a clue? I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted August 17, 2017 Share Posted August 17, 2017 Reminds me of oxytoma, but it's different and slightly late. Good luck for getting a proper ID! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted August 17, 2017 Share Posted August 17, 2017 Limpet. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted August 17, 2017 Share Posted August 17, 2017 Or it's obviously a limpet... “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 17, 2017 Share Posted August 17, 2017 @MikeR 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...
Al Dente Posted August 17, 2017 Share Posted August 17, 2017 It may be some species of Crucibulum. Here's some from Google -https://www.google.com/search?q=crucibulum+deformis&rlz=1C1GCEA_enUS747US750&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjn1N_6iN7VAhUBRSYKHeCMBMIQ_AUICygC&biw=1350&bih=702 2 Link to comment Share on other sites More sharing options...
I_gotta_rock Posted August 17, 2017 Author Share Posted August 17, 2017 Oh, if it helps anyone at all, the most recent one was pulled from a block of Choptank Formation sand, Drum Cliff Member. I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Plax Posted August 17, 2017 Share Posted August 17, 2017 I use a modern shell book to find the genus. This works very well for many if not most neogene mollusks. Then I go to a fossil reference book and look in the index for that genus and proceed from there (as below). http://msa.maryland.gov/megafile/msa/speccol/sc6000/sc6046/000000/000001/000000/000040/pdf/msa_sc6046_1_40.pdf Cruclbulum,cxxviii;2i). auricula var. costatum, 245. constrictum, cvi, cxxviii, cliv; 246. costatum, cvl; 244, 245. costatum var. plleolum, cvl, cxxviii; 245. multillneata, 246. multilineatum, xcil, cvl, cxxviii; 246. 2 Link to comment Share on other sites More sharing options...
I_gotta_rock Posted September 14, 2017 Author Share Posted September 14, 2017 And the answer is, in fact Crucibulum! The trick is, this is not the external shell, it is the shelf! That little jagged edge in the top left of the 3rd picture is the point where it was attached to the main shell. No wonder I have several of these. They weren't attached very well but they were pretty good-sized shells, so they snapped at the weakest point consistently. 1 I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
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