Miocene_Mason Posted January 20, 2018 Share Posted January 20, 2018 I have been going through some micro I collected at brownies beach (Calvert FM, Miocene. Zones 4 and 10 mostly) and this tooth looks a little strange to me. Its small, 5 MM about. I'm guessing its a Physogaleus contortus, but I'm not sure. Confirmation, other ideas, and any other information is welcome and encouraged. sorry about poor picture quality, USB microscope is a bit grainy. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted January 20, 2018 Share Posted January 20, 2018 All three pictures are of one side. Can You post the other side and edge views? 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...
Miocene_Mason Posted January 20, 2018 Author Share Posted January 20, 2018 7 minutes ago, ynot said: All three pictures are of one side. Can You post the other side and edge views? First picture is the back (posterior) side of the tooth and the second is the front (anterior). Last is front again. I’ll see if I can get a side picture but that may be impossible. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted January 20, 2018 Share Posted January 20, 2018 OK. I think it is a mesial or parasymphyseal. If so it could have come from several different species. Without the roots it is beyond Me to say. Maybe @MarcoSr, @siteseer, @sixgill pete, @Al Dente 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...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 1 hour ago, ynot said: I think it is a mesial or parasymphyseal I’m not gonna lie, I was kinda hoping you were going to say that People seem to seek these positions, they are (as the terms suggest) in the middle of the mouth, correct? “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted January 21, 2018 Share Posted January 21, 2018 40 minutes ago, WhodamanHD said: they are (as the terms suggest) in the middle of the mouth, correct? They are the teeth that come from the area where the two jaws meet, so yes the center of the mouth. 2 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...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 7 minutes ago, ynot said: They are the teeth that come from the area where the two jaws meet, so yes the center of the mouth. Thank you, my anatomical terms are not yet up to par “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
caldigger Posted January 21, 2018 Share Posted January 21, 2018 13 minutes ago, ynot said: They are the teeth that come from the area where the two jaws meet, so yes the center of the mouth. I never knew that either till now. Thanks. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 I have a handy dandy cheat sheet for this kind of thingto hide my inexperience. Parasymphseals are not marked, perhaps because only certain sharks have them. Mesial I knew meant towards middle from previous dealings with sharks teeth. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted January 21, 2018 Share Posted January 21, 2018 1 minute ago, WhodamanHD said: Parasymphseals are not marked, perhaps because only certain sharks have them. Mesial I knew meant towards middle I think it is two words for the same thing. 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...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 Just now, ynot said: I think it is two words for the same thing. Ah, that makes sense. Wonder why they did that, just to confuse me I suppose.. I would love to have posted a picture of my diagram but alas, the forum has been glitches by the “update” so it’s not allowing it. “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
sixgill pete Posted January 21, 2018 Share Posted January 21, 2018 Here is a good guide to I.D. tooth positions, including symphyseals. https://paleobiology.si.edu/pdfs/sharktoothKey.pdf As far as your tooth, I do not believe it is Physogaleus contortus. I am thinking some type of Carcharhinidae. But, I think it is to broken to go any farther than that. 1 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...
Miocene_Mason Posted January 21, 2018 Author Share Posted January 21, 2018 5 minutes ago, sixgill pete said: As far as your tooth, I do not believe it is Physogaleus contortus. I am thinking some type of Carcharhinidae. But, I think it is to broken to go any farther than that. I was afraid of that. Still thinking parasymphseal? That link is also very helpful, I’ll read through it in depth soon! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
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