sharko69 Posted April 14, 2015 Share Posted April 14, 2015 This tooth is just over 1mm and was found in my bag of matrix from Post Oak Creek. As always, I appreciate any feedback. Link to comment Share on other sites More sharing options...
sixgill pete Posted April 14, 2015 Share Posted April 14, 2015 I am thinking the tooth may be Cretorectolobus sp. after looking at Collectors Guide to fossil sharks and rays from the Cretaceous of Texas, by Bruce J. Welton. If so this is a really good find. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
Darktooth Posted April 14, 2015 Share Posted April 14, 2015 Sweet little tooth! I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
sharko69 Posted April 14, 2015 Author Share Posted April 14, 2015 I was thinking Cretorectolobus sp. As well because of the root but have not found a lot of good pictures for comparison. Link to comment Share on other sites More sharing options...
Al Dente Posted April 14, 2015 Share Posted April 14, 2015 I think it is Ischyrhiza mira. Link to comment Share on other sites More sharing options...
sharko69 Posted April 14, 2015 Author Share Posted April 14, 2015 I think you are correct. Oral Ischyrhiza tooth. Thank you. Link to comment Share on other sites More sharing options...
Diceros Posted April 19, 2015 Share Posted April 19, 2015 Al's right, as usual. Sometimes the heels of Ischyrhiza teeth are longer and narrower than usual, so they mimic Cretorectolobus. The occlusal surface of I. mira is very variable. I object to the term "oral tooth", as all teeth are oral. The rostral denticles of sclerorhynchid sawfish like Ischyrhiza (and Tertiary and modern pristid sawfish) are out on the edges of the rostrum, are not from the mouth, and are, in no sense, teeth (you can prepare food with your fingers, but it doesn't make them teeth). It's especially misleading to call rostral denticles teeth, because then collectors stop looking for the (far smaller, and far differently-shaped) actual teeth. Link to comment Share on other sites More sharing options...
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