Angie Posted January 12, 2017 Share Posted January 12, 2017 Hey everyone! So I have this tooth laying around for a while, not exactly knowing what it is. Have been struggling a lot with determinating it, so I hope someone can help me out It's from miocene/pliocene layers and its length is about half an inch. This is the tooth in question (I'm sorry for the bad quality, had a hard time photographing it ): I saw this picture: Source: http://www.fossilguy.com/gallery/vert/fish-shark/hemipristis/hemipristis.htm Could this be a match? 1 Link to comment Share on other sites More sharing options...
ynot Posted January 12, 2017 Share Posted January 12, 2017 I agree with Your id of this tooth. Tony 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...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Thank you for your fast reply! I'm stoked, hemi's are pretty rare for the location where I've found it Link to comment Share on other sites More sharing options...
sixgill pete Posted January 12, 2017 Share Posted January 12, 2017 It does appear to be a hemi lower symphyseal tooth. Nice find. Even from Lee Creek sediments where hemi's are very common, the symphyseal teeth are not. 2 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...
Vieira Posted January 12, 2017 Share Posted January 12, 2017 I agree with a lower Hemipristis too. 1 Link to comment Share on other sites More sharing options...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Thanks sixgill pete and Vieira for the replies! 2016 just got better haha Link to comment Share on other sites More sharing options...
Vieira Posted January 12, 2017 Share Posted January 12, 2017 Just now, Angie said: Thanks sixgill pete and Vieira for the replies! 2016 just got better haha Link to comment Share on other sites More sharing options...
belemniten Posted January 12, 2017 Share Posted January 12, 2017 Congrats ! Great find ! 1 Many greetings from Germany ! Have a great time with many fossils Regards Sebastian Link to comment Share on other sites More sharing options...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Thank you! Link to comment Share on other sites More sharing options...
Al Dente Posted January 12, 2017 Share Posted January 12, 2017 It looks similar to an upper Hexanchus or Notorhynchus. How common are Hemipristis in Antwerp? I thought they were fairly rare. 3 Link to comment Share on other sites More sharing options...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Thank you! They're very rare yes, while Notorynchus on the other hand are pretty common (Hexanchus are uncommon) Link to comment Share on other sites More sharing options...
siteseer Posted January 12, 2017 Share Posted January 12, 2017 4 hours ago, Angie said: Hey everyone! So I have this tooth laying around for a while, not exactly knowing what it is. Have been struggling a lot with determinating it, so I hope someone can help me out It's from miocene/pliocene layers and its length is about half an inch. This is the tooth in question (I'm sorry for the bad quality, had a hard time photographing it ): I saw this picture: Source: http://www.fossilguy.com/gallery/vert/fish-shark/hemipristis/hemipristis.htm Could this be a match? Your tooth looks like it has a broader root and more broad-based crown than what I have seen of a Hemipristis lower symphyseal though it would help to see photos that show a direct view of the labial and lingual faces (rather than views at an angle). The photo from fossil guy.com shows direct views of the faces along with a direct profile view. I think your tooth is a Notorynchus upper parasymphyseal. Hemipristis lower symphyseals are very slender teeth and tend not to have much of a root even when found in a deposit that allows for excellent preservation. Your tooth shows some wear. I don't think a Hemipristis lower symphyseal would survive as well. 4 Link to comment Share on other sites More sharing options...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Thank you siteseer! Your explanation definitely makes sense, as it is an ex-situ tooth Link to comment Share on other sites More sharing options...
sixgill pete Posted January 12, 2017 Share Posted January 12, 2017 3 hours ago, sixgill pete said: It does appear to be a hemi lower symphyseal tooth. Nice find. Even from Lee Creek sediments where hemi's are very common, the symphyseal teeth are not. well, after seeing Al Dente's and siteseer's replies, I think I may have jumped the gun on this one. Since reading them I got out one of my hemi symphyseal's and as siteseer said the tooth is narrow and compressed looking compared to your tooth. Good call you guys. 2 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...
Angie Posted January 12, 2017 Author Share Posted January 12, 2017 Looked up some pictures, parasymphyseal upper Notorynchus is definitely a better match! Thanks everyone for the help, appreciate it! Link to comment Share on other sites More sharing options...
Sacha Posted January 12, 2017 Share Posted January 12, 2017 I was sorting through teeth today after reading this thread and although this one doesn't look all that similar, this one is structured similar to the little meg I put in the auction, with a good balanced root, but a goofy small curved blade. There are poorly defined serration on the shoulders (I think it's a hemi), but pretty weird. Is it just a weird one, or did I get lucky again? This is from Florida's Peace River. Link to comment Share on other sites More sharing options...
Al Dente Posted January 12, 2017 Share Posted January 12, 2017 Looks like Physogaleus contortus. 1 Link to comment Share on other sites More sharing options...
digit Posted January 13, 2017 Share Posted January 13, 2017 I agree with P. contortus for John's tooth above. Funny how I just came across this topic while doing a forum search for the phrase "Peace River" even though the tooth that started this topic was found far from the Peace (and Notorynchus are so rare in the Peace as to be virtually absent--though they are spectacular trip-maker finds when they do turn up). I say it is funny that I stumbled upon this topic as shortly after I was sorting through a cup of micro-matrix from South Florida looking for micros when a "macro" tooth appeared. Looks like this one was just slim enough to squeeze between the 1/4" mesh that I use on my top sifter when collecting micro-matrix (I use a 1/20" window screen mesh laid in the bottom sifter to let out the sand and ultra-fine gravel). My mind must have been thinking about Hemipristis serra lower symphyseals after reading the above discussion as it was able to conjure up one hiding in my micro-matrix. This is a quick set of photos with the micro setting of my point-and-shoot. If clearer photos are desired, I could photograph it again when I setup my DSLR and my photo-stacking software. This specimen measures 17.5 mm from tip to tip and a mere 3mm in width. Hemi's are fairly common in the Peace River and I occasionally find tiny uppers while sorting micro-matrix--I've included a photo of one of the smaller ones. Cheers. -Ken 1 Link to comment Share on other sites More sharing options...
sixgill pete Posted January 15, 2017 Share Posted January 15, 2017 for comparison; one of my lower hemi symphyseal's. 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...
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