Reebs Posted June 27, 2023 Share Posted June 27, 2023 Greetings, I recently found this in Sarasota county, Florida. It is approximately 2 inches (5.08 cm) long and .5 inches (1.27 cm) wide. It has very interesting texture and one side has what appear to be 2 holes of the same size that are in a line and filled with matrix. This makes me think possibly a fragment of jaw section. Looking for ID please. Thank you, Marie Link to comment Share on other sites More sharing options...
Mahnmut Posted June 27, 2023 Share Posted June 27, 2023 (edited) Interesting texture indeed! I wonder if this could be a piece of chondrichthyan cartilage? Best Regards, J Edited June 27, 2023 by Mahnmut spelling 2 Try to learn something about everything and everything about something Thomas Henry Huxley Link to comment Share on other sites More sharing options...
Shellseeker Posted June 28, 2023 Share Posted June 28, 2023 6 hours ago, Mahnmut said: Interesting texture indeed! I wonder if this could be a piece of chondrichthyan cartilage? Best Regards, J Add @Al Dente Is Chondrichthyan possible in Florida? I was thinking possibly Crab.... @RJB @digit Do you know a Florida Crab guy ? The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
bockryan Posted June 28, 2023 Share Posted June 28, 2023 31 minutes ago, Shellseeker said: Add @Al Dente Is Chondrichthyan possible in Florida? I was thinking possibly Crab.... @RJB @digit Do you know a Florida Crab guy ? Useful entry from the Fossil Guy, looks like a reasonable match: Fossil Shark Cartilage Although shark cartilage, aside from the vertebra, is unlikely to fossilize, the cartilage in the jaw of a shark tends to fossilize more often than other types of cartilage. This fossilized shark cartilage is often found as fragmentary chunks, and therefore can be almost any shape. However, the surface of the cartilage has a unique prismatic pattern making it unmistakable when found. Figure 5 shows a piece of shark cartilage. Figure 5: This image shows a piece of fossilized cartilage that is most likely from the jaw of a shark. Notice the prismatic like structure. This cartilage is about 1.5" (38mm) in length, and was found at the PCS mine in Aurora, NC. 4 Link to comment Share on other sites More sharing options...
digit Posted June 28, 2023 Share Posted June 28, 2023 1 hour ago, Shellseeker said: @digit Do you know a Florida Crab guy ? That would be Roger Portell but I agree this looks a lot like the prismatic cartilage of a chondrichthyan. Shark cartilage is rarely preserved but it does make it into the fossil record. I've only ever seen one piece in person. Cheers. -Ken 1 1 Link to comment Share on other sites More sharing options...
Al Dente Posted June 28, 2023 Share Posted June 28, 2023 Most likely part of a sawfish rostrum. 1 1 Link to comment Share on other sites More sharing options...
RJB Posted June 28, 2023 Share Posted June 28, 2023 Certainly does not look like crab pustuals. RB 1 1 Link to comment Share on other sites More sharing options...
digit Posted June 28, 2023 Share Posted June 28, 2023 3 hours ago, Al Dente said: Most likely part of a sawfish rostrum. That would make a lot of sense. Cheers. -Ken Link to comment Share on other sites More sharing options...
Carl Posted June 28, 2023 Share Posted June 28, 2023 15 hours ago, Shellseeker said: Add @Al Dente Is Chondrichthyan possible in Florida? I was thinking possibly Crab.... @RJB @digit Do you know a Florida Crab guy ? Chondrichthyans include sharks, rays, and sawfish, so they are not only possible in Florida but insanely common. 1 Link to comment Share on other sites More sharing options...
digit Posted June 28, 2023 Share Posted June 28, 2023 5 minutes ago, Carl said: Chondrichthyans include sharks, rays, and sawfish, so they are not only possible in Florida but insanely common. No truer words were ever spoken. (Well, maybe a few....) Cheers. -Ken 1 Link to comment Share on other sites More sharing options...
Shellseeker Posted June 28, 2023 Share Posted June 28, 2023 13 minutes ago, Carl said: Chondrichthyans include sharks, rays, and sawfish, so they are not only possible in Florida but insanely common. Yes, Chondrichthyan was an add to my vocabulary, and I butchered my interpretation of its meaning... The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
digit Posted June 28, 2023 Share Posted June 28, 2023 18 minutes ago, Shellseeker said: Yes, Chondrichthyan was an add to my vocabulary, and I butchered my interpretation of its meaning... I use it so much that I've had to add it to my spell checker dictionaries. Here's another other good Scrabble word: selachian (Selachimorpha) https://en.wiktionary.org/wiki/selachian https://en.wikipedia.org/wiki/Shark This limits the chondrichthyans to the "shark" types and excludes the Batoidea (flat-bodied rays). Cheers. -Ken 1 1 Link to comment Share on other sites More sharing options...
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