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Showing results for tags 'serratus'.
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The shark relative is genus of eugenodontia holocephalid from the Carboniferous-Pennsylvanian age Anna shale formation, Carbondale group, found in different Illinois coal mines. I dont know(yet)which mine these were found in. This unidentified species is of the "vorax-serratus- crenulatus-heinrichi" or "E. heinrichi group", with the teeth being more of a standard triangular shape, as opposed to being thinner and pointed at a forward angle as in the "E. minor" group http://www.thefossilforum.com/applications/core/interface/file/attachment.php?id=501751
ElToro posted a topic in Partners in Paleontology - Member Contributions to ScienceI have been researching a fossil "Anomalocaris sp" from the Wheeler Shale. Its from a collector who thought it was his "worst" Anomalocaris fossil and he was clearing his collection to make room for more. I collect Anomalocaridids so bought it from him for less than a $100. I thought the feeding appendage was a little strange as it was so straight, the spines were strange and small, and I couldn't see the podomeres (segments). I love the papers from Dr Allison Daley of Oxford who is an expert on Anomalocaridids and in a paper "New Anomalocaridid appendages from the Burgess Shale, Canada", (A.C. Daley & G.E. Budd, Palaeontology vol53, part 4, pp 721-738, 2009) I read about a very rare and enigmatic Anomalocaridid, the Caryosyntrips serratus. Only 11 or so specimens of this critter have been found and all at Burgess. I realized I was looking at my "anomalous" Wheeler Shale Anomalocaris. But how can this be? The Caryosyntrips has never been found outside of Burgess. Wheeler is also substantially younger. I was sufficiently convinced that I sent an email to Dr Allison Daley and she responded quite fast. She's very excited about this fossil! She also believes it to be a Caryosyntrips serratus and couldn't believe I have one from Wheeler Shale! The greatly increases the temporal and geographic range of this genus and is very important to study. She is writing a new paper on the Anomalocaridids of the US and this is a massive new discovery which will feature in her paper. Of course, I am sending her the fossil to study. After that she recommends I donate it to the Museum of my choice, and suggested the Smithsonian as they already have a large Wheeler Shale collection. Being an Aussie, I'd love it to end up at an Aussie museum, but this Caryosyntrips was "born in the USA" so I believe that's where it belongs. So the Smithsonian it is. Great lesson to everyone on researching your fossils! Sometimes a seemingly impossible fossil can actually be a new discovery. And communicate with the experts, this fossil could have ended up in a private collection as a "low quality Anomalocaris sp." Finally, I could sell this for a huge price to a private collector, but its much better off being studied and residing in a Museum. That's where it belongs. On Monday I will send the fossil off to Oxford for Dr Daley to study. Can't wait to read her new paper!
I have identified this Wheeler Shale fossil as Caryosyntrips sp. (The Burgess species are serratus, but this is much younger and a different location so is most likely a new species). It was thought to be Anomalocaris sp. I have sent this fossil to Dr Allison Daley of Oxford for study. The Caryosyntrips has only ever been found at the older Burgess Shale.