Shark Denticles
In a recent post about denticles (here), it was mentioned that most of the dermal denticles we find are usually from rays, and not sharks. Ray denticles are much larger than most shark denticles, especially the big sharp thorns common on some rays. I was determined to finally find a few nice shark denticles for my collection - I've already got plenty of ray denticles, but I had never found any from Cenozoic sharks (I have a few tiny Paleozoic denticles, but those are much different looking).
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As I've already stated earlier in this thread, the shark denticles I found in the fine sand and silt from Sharktooth Hill are the first Cenozoic denticles I've collected. However, I do have some from older time periods. So, I thought I'd share some pictures of a few older shark denticles - here are a few from the Late Triassic.
