shark model number - GADGET
Shark vertebrae tend to be preserved as just the centrum (the hockey puck-like disk) with two openings on top and two on the bottom where the hemal and neural arches were attached. The arches were cartilaginous in life and disintegrate quickly after death. The centrum sometimes survives as a fossil because it is at least partially ossified.
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Because they aren't solid bone, they are fragile ... Shark Vert Vs Fish Vert - Questions & Answers - The Fossil Forum Midlothian Quarry Shark Teeth and More! cretaceous midlothian texas By JamieLynn in Fossil Hunting Trips Figure 7 Different shark vertebrae types Lamniform sharks include Alopias (thresher shark), the sand tiger Carcharias, the basking sharks, the White sharks Carcharodon or Cosmopolitodus, the Isurus true Makos, the Otodus megatooth sharks, and the megamouth sharks Mechasma. Fish and Shark Vertebrae Notes - General Fossil Discussion - The Fossil ...
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So I approached this as a newbee. I put together a power point program showing pictures (53) of shark teeth crown and root features, pictures showing the labial and lingual sides, serrations, cusps, cutting edge directions-mesial & distal and changes in teeth based on their tooth position. For fun, pictures of pathological teeth are shown. I don't know. Michigan was high and dry from the Mesozoic and later, the ages for these types of teeth (except for the great lakes which are fresh water).
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These look like shark teeth that are found in coastal areas,Tx, La, Fla, the Carolinas and California. My knowledge of shark taxonomy is basically limited to that text and your comment! 9 - Astercanthus is a great shout, these are definitely known from the Oxford Clay 12 - apologies I think these are probably the limit of iPhone 8 at the moment! If so, maybe Plesiosaur??