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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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- placoid scale
- dermal denticle
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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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