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Showing results for tags 'elasmobranch'.
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Hello all! Just finished going through a small batch of matrix from the York River and found a some fossils that I need help IDing. 1. These ones strike me as some sort of polychaete jaws, but not sure. 2. Some denticles or teeth but they seem a lot different than the skate (Rostroraja sp.) that I've been finding (see 2.1). These do not have the cusp or base morphology that I've been observing and are quite smaller. 2.1 Rostroraja teeth Thanks so much! Miguel M
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From the album: Post Oak Creek
To find denticles, you need to go to the finest grain size. This beautiful one could be shark, but I'm not certain.-
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I know very little about shark teeth. I found this one a while back in Pennsylvanian (Desmoinesian) shale in northeastern Oklahoma. I am speculating this may be deltodus only because I see a nearly identical tooth labeled as deltodus on another website. The fossil is very thin (too thin to photograph the edges). Besides confirming the taxonomy, can anyone tell me which surface of the tooth is shown in Side A? Finally, would you say Side B is mainly matrix (other than the edges)? I think matrix is showing through the cracks on Side A, and that may be the only thing holding the fossil together. My wife recently got me a camera, so I am working on a gallery album in the forum. I would like to make sure I have the IDs correct before I post photos in the album, so you may be seeing several ID requests from me over the next weeks. Best wishes
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- chondrichthyes
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My name is Mike and I'm originally from Orange county NY and now live in Florida. I retired last December. I am starting to introduce my 11 yo grand son to fossil hunting and mineral hunting. We have been collecting for the last 3 years so I would like to learn more about fossils in general and perk a greater interest in collecting and learning about our hobbies.
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Came across this paper published last year, apologies if it's already posted. Located in the Falcon State of Venezuela the Urumaco formation provides a good look at the Sawfish and other elasmobranch Assemblages of the South Caribbean in the late Miocene, in an area that gets very little notoriety. (A) Sharpnose shark Rhizoprionodon sp., (B) Hammerhead shark Sphyrna cf. zygaena, (C) Bull shark Carcharhinus leucas, (D) “Big tooth” Carcharocles megalodon, (E) Tiger shark Galeocerdo cuvier, (F) Spotted eagle ray Aetobatus cf. narinari, (G) Eagle rayMyliobatis sp., (H) Guitarfish Rhynchobatus sp., (I) Sawfish Pristis sp., (J) Stingray cf.Dasyatis. Artwork by Jorge Gonzalez. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0139230#pone-0139230-g011
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