WillK Posted December 22, 2016 Share Posted December 22, 2016 This shark tooth was found deep in a cave on an island which is off the Panamanian coast (Atlantic side). It appears to be a fossilized mako shark tooth; however, I haven't been able to identify the exact Isurus species. It doesn't appear to be either of the currently living mako shark species, Isurus Oxyrinchus or Isurus Paucus. That leaves eleven other extinct species. Any help would be very appreciated! Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 22, 2016 Share Posted December 22, 2016 Not a Mako. Looks like a sand tiger shark tooth, missing the root. Wait for some other opinions, though. Regards, Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Shellseeker Posted December 22, 2016 Share Posted December 22, 2016 Not Mako. I think Snaggletooth lower. 5 The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
PaleoRon Posted December 22, 2016 Share Posted December 22, 2016 I would agree that it is a lower Hemipristis. 2 Link to comment Share on other sites More sharing options...
ynot Posted December 22, 2016 Share Posted December 22, 2016 Third for lower Hemipristis. Tony 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
FossilDudeCO Posted December 22, 2016 Share Posted December 22, 2016 and I shall fourth it. The little knobby part on the front is very distinguishable. Although worn it is present on yours. 2 Link to comment Share on other sites More sharing options...
Vieira Posted December 22, 2016 Share Posted December 22, 2016 It's Hemipristis Serra indeed. No doubt. 2 Link to comment Share on other sites More sharing options...
Plax Posted December 22, 2016 Share Posted December 22, 2016 keep in mind that your submarine cave was probably above sea level for many hundreds of thousand years during the glacial periods. Ground water during the emergent times would dissolve or erode the teeth out of the native rock. I would look for invertebrate fossils in the limestone next time I was there so that an age could be determined for your teeth. 1 Link to comment Share on other sites More sharing options...
gavialboy Posted December 22, 2016 Share Posted December 22, 2016 I agree with the id of snaggletooth. Link to comment Share on other sites More sharing options...
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