John Hamilton Posted August 6, 2013 Share Posted August 6, 2013 Is this tooth Parascyllium, Proscyllium, or Scyliorhinus? Link to comment Share on other sites More sharing options...
Al Dente Posted August 6, 2013 Share Posted August 6, 2013 My short answer is Pachyscyllium. In the past, many papers that described fossil shark teeth would lump all catsharks under Scyliorhinus regardless of their morphology but modern Scyliorhinus have slender cusps and their labial face has strong folds and their root has a strong lingual protruberance. Proscyllium teeth are tiny - less than 1 mm. with a concave labial face and V-shaped root when viewed from front or back. Parascyllium is an orectolobiform with very broad cusps. 2 Link to comment Share on other sites More sharing options...
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