Cainozoic Posted July 24, 2016 Share Posted July 24, 2016 Hi All, The fossils below were collected by me from the Batesford Limestone, Batesford Quarry, Victoria Australia and should be Early to Mid Miocene in age. I know that they are not in the best condition and that is why I have struggled to come up with an ID for them. Any help or suggestions as to what they may be will be appreciated greatly. Thank you for your time and input. The gradations on the ruler show millimeter intervals. Old fossil hunters never die, they just petrify! Link to comment Share on other sites More sharing options...
Cainozoic Posted July 24, 2016 Author Share Posted July 24, 2016 Just for clarification, I understand that they are possibly from different species so please consider them numbered from 1 to 6 from left to right and the alternate photographs show alternate sides in the same order. I hope that makes sense, thank you. Old fossil hunters never die, they just petrify! Link to comment Share on other sites More sharing options...
ynot Posted July 24, 2016 Share Posted July 24, 2016 I think that they are all Cosmopolitodus (Isurus) hastalis. It is hard to be certain with the roots in such bad shape. 1 and 5 look lower - the others look upper. Tony PS My track record on shark tooth IDs is not the greatest, so let Us see what the others say. 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...
caldigger Posted July 24, 2016 Share Posted July 24, 2016 I may be mistaken but I'm not getting a Mako vibe from these. Not seeing any flat(labial)side. And why do they all curve to one side. The hastalis lowers I'm used to are pretty straight. Link to comment Share on other sites More sharing options...
Cainozoic Posted July 25, 2016 Author Share Posted July 25, 2016 Thank you, I couldn't match it to any other teeth I have collected from that site. Old fossil hunters never die, they just petrify! Link to comment Share on other sites More sharing options...
sagacious Posted July 25, 2016 Share Posted July 25, 2016 Hi Cainozoic, Your teeth above are family Hexanchidae. They're the large primary mesial cusp, broken-off from the rest of the tooth. I suspect what may be confusing the ID is that the teeth are all only a few millimeters long, and are missing the distinctive flat root and distal cusps. Compare with the broken-off cusps of Hexanchus cf. H. gigas teeth below. Check your formation fauna to assist with a species match. Link to comment Share on other sites More sharing options...
Cainozoic Posted July 26, 2016 Author Share Posted July 26, 2016 Hi Cainozoic, Your teeth above are family Hexanchidae. They're the large primary mesial cusp, broken-off from the rest of the tooth. I suspect what may be confusing the ID is that the teeth are all only a few millimeters long, and are missing the distinctive flat root and distal cusps. Compare with the broken-off cusps of Hexanchus cf. H. gigas teeth below. Check your formation fauna to assist with a species match. Hi Sagacious, I think that you may be onto something, do you think that they could be worn uppers as they seem to be thicker and more curved than the lower teeth that I have recovered from the site. Busted lower Notorynchus primigenius. Old fossil hunters never die, they just petrify! Link to comment Share on other sites More sharing options...
sagacious Posted July 27, 2016 Share Posted July 27, 2016 Hi Sagacious, I think that you may be onto something, do you think that they could be worn uppers as they seem to be thicker and more curved than the lower teeth that I have recovered from the site. Busted_cows.jpg Busted lower Notorynchus primigenius. Yup, it looks like your teeth compare very well to Notorhynchus primigenius upper lateral teeth. I'd say you've got a match. Link to comment Share on other sites More sharing options...
Cainozoic Posted July 30, 2016 Author Share Posted July 30, 2016 Thank you, I am happy with the ID! Old fossil hunters never die, they just petrify! Link to comment Share on other sites More sharing options...
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