The Jersey Devil Posted December 28, 2019 Share Posted December 28, 2019 Hi everyone, I think I found a year maker recently, and in good time! The 1st tooth pictured is what I am praying is a Pseudocorax affinis, which is incredibly rare here. The 2nd tooth is an Archaeolamna, I just need confirmation that it’s a symphyseal. Both teeth are Late Cretaceous. Edit: I forgot to add the size, 1st tooth: 12 mm, 2nd tooth: 10 mm @non-remanié @Al Dente @siteseer Happy Holidays! 1st tooth: 3 “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 28, 2019 Author Share Posted December 28, 2019 2nd tooth: 1 “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
sixgill pete Posted December 28, 2019 Share Posted December 28, 2019 I agree with Psuedocorax for the first tooth. Though I'm no expert, but I do believe that is a correct ID. Very nice find. The second tooth, I would lean towards symphyseal, but lets see what other have to say. @MarcoSr 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...
MarcoSr Posted December 28, 2019 Share Posted December 28, 2019 13 minutes ago, sixgill pete said: I agree with Psuedocorax for the first tooth. Though I'm no expert, but I do believe that is a correct ID. Very nice find. The second tooth, I would lean towards symphyseal, but lets see what other have to say. @MarcoSr I agree that the first tooth looks like a Psuedocorax. Really nice specimen. From the features of the second tooth, it looks like either a symphyseal or an intermediate tooth. Marco Sr. 1 "Any day that you can fossil hunt is a great day." My family fossil website Some Of My Shark, Ray, Fish And Other Micros My Extant Shark Jaw Collection Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 28, 2019 Author Share Posted December 28, 2019 1 hour ago, sixgill pete said: I agree with Psuedocorax for the first tooth. Though I'm no expert, but I do believe that is a correct ID. Very nice find. The second tooth, I would lean towards symphyseal, but lets see what other have to say. @MarcoSr 35 minutes ago, MarcoSr said: I agree that the first tooth looks like a Psuedocorax. Really nice specimen. From the features of the second tooth, it looks like either a symphyseal or an intermediate tooth. Marco Sr. Thanks guys! It might be a couple decades or never until I find another complete NJ Pseudocorax. Marco, is there any way to distinguish symphyseal and intermediate Archaeolamna teeth? I thought Archaeolamna intermediate teeth looked pretty different. “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
Dryptosaur Posted December 28, 2019 Share Posted December 28, 2019 Here is a tooth I found years ago in New Jersey which appears to be a Pseudocorax also. 1 Link to comment Share on other sites More sharing options...
non-remanié Posted December 28, 2019 Share Posted December 28, 2019 Nice! Congrats Joseph. 1 ---Wie Wasser schleift den Stein, wir steigen und fallen--- Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 28, 2019 Author Share Posted December 28, 2019 1 hour ago, Dryptosaur said: Here is a tooth I found years ago in New Jersey which appears to be a Pseudocorax also. Yeah it looks like another Pseudo. Could you please post a pic of the lingual side? The nutrient groove should confirm it “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 28, 2019 Author Share Posted December 28, 2019 1 hour ago, non-remanié said: Nice! Congrats Joseph. Thanks Steve! I’m glad it’s not another Squali. What are your thoughts on the other tooth? Is it symphyseal like I originally thought or an intermediate? Btw I sent you a PM some time ago. “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
MarcoSr Posted December 28, 2019 Share Posted December 28, 2019 (edited) 11 hours ago, The Jersey Devil said: Thanks guys! It might be a couple decades or never until I find another complete NJ Pseudocorax. Marco, is there any way to distinguish symphyseal and intermediate Archaeolamna teeth? I thought Archaeolamna intermediate teeth looked pretty different. Looking at the recontructed dentition (see below) of Archaeolamna from Underwood, C. and S. Cumbaa, 2010. Chondrichthyans from a Cenomanian (Late Cretaceous) bonebed, Saskatchewan, Canada. Palaeontolgy.Vol. 53(4): 903-944. your tooth looks more like the upper or lower parasymphyseal tooth than the upper intermediate tooth. There is a lot of variation in these parasymphyseal teeth. Link to the paper which has a good text description of the parasymphyseal and intermediate teeth: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1475-4983.2010.00969.x You can see the parasymphyseal and intermediate teeth better in the below figure. I can't locate my copy of Cook, T., M Newbrey, A. Murray, M. Wilson, K Shimada, G. Takeuchie and J. Stewart, 2011. A partial skeleton of the Late Cretaceous lamniform shark, Archaeolamna kopingensis, from the Pierre Shale of western Kansas, U.S.A. Journal of Vertebrate Paleontology, 31: 1, 8-21 that Dr. Newbrey gave to me. In this paper they depict the Archaeolamna dentition using articulated material. You need to check that dentition also. From the abstract: "The specimen includes portions of the upper and lower jaws with articulated teeth. The dentition consists of two files of upper and lower anterior teeth that, together with a single file of intrabullar intermediate teeth, are housed in a dental bulla, as well as multiple files of lateral teeth, along with at least two files of lower symphysial teeth and a single file of upper symphysial teeth. The intrabullar intermediate tooth is slightly shorter than the other anterior teeth and has a median cusp with distinctive distal curvature. " Marco Sr. Edited December 28, 2019 by MarcoSr added figure and abstract and paper link 1 "Any day that you can fossil hunt is a great day." My family fossil website Some Of My Shark, Ray, Fish And Other Micros My Extant Shark Jaw Collection Link to comment Share on other sites More sharing options...
Al Dente Posted December 28, 2019 Share Posted December 28, 2019 8 hours ago, The Jersey Devil said: The 1st tooth pictured is what I am praying is a Pseudocorax affinis, which is incredibly rare here. Nice tooth. 1 Link to comment Share on other sites More sharing options...
siteseer Posted December 30, 2019 Share Posted December 30, 2019 Wow, that first tooth may be the first P. affinis I've ever seen from North America. I'm going to have to look through some boxes but I think the only one I have is from Holland. Yes, I think the second tooth is a parasymphyseal of Archaeolamna. It's the right size and root shape. Jess 1 Link to comment Share on other sites More sharing options...
Dryptosaur Posted December 30, 2019 Share Posted December 30, 2019 On 12/28/2019 at 12:29 AM, The Jersey Devil said: Yeah it looks like another Pseudo. Could you please post a pic of the lingual side? The nutrient groove should confirm it Here is the other side of mine. Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 30, 2019 Author Share Posted December 30, 2019 5 hours ago, siteseer said: Wow, that first tooth may be the first P. affinis I've ever seen from North America. I'm going to have to look through some boxes but I think the only one I have is from Holland. Yes, I think the second tooth is a parasymphyseal of Archaeolamna. It's the right size and root shape. Jess They’ve been found before in the US, at least in NJ and NC. “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
The Jersey Devil Posted December 30, 2019 Author Share Posted December 30, 2019 48 minutes ago, Dryptosaur said: Here is the other side of mine. Yeah that’s definitely another Pseudo! “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
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