Kevin Anderson Posted October 30, 2013 Share Posted October 30, 2013 (edited) Some teeth from a sample taken in Bakersfield CA. BKA257004Dasyatis sp. tooth BKA257003Dolphin tooth BKA257002Cetorhinus maximus (Basking shark) Edited October 30, 2013 by Kevin Anderson Link to comment Share on other sites More sharing options...
MarcoSr Posted October 30, 2013 Share Posted October 30, 2013 Nice specimens. It looks like your Cetorhinus has a cusplet. Cetorhinus from Bakerfield with one cusplet are not common. I would call your tooth Cetorhinus sp. instead of maximus. Marco Sr. "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...
John Hamilton Posted October 30, 2013 Share Posted October 30, 2013 (edited) I like the dolphin tooth and the photography is excellent. Edited October 30, 2013 by John Hamilton Link to comment Share on other sites More sharing options...
Kevin Anderson Posted October 31, 2013 Author Share Posted October 31, 2013 (edited) Nice specimens. It looks like your Cetorhinus has a cusplet. Cetorhinus from Bakerfield with one cusplet are not common. I would call your tooth Cetorhinus sp. instead of maximus. Marco Sr. That is the only one so far that has a cusplet. I identified them C. maximus based on similarity to the pictures in http://www.elasmo.com/genera/cenozoic/sharks/cetorhinus.html. I like the dolphin tooth and the photography is excellent. Thank, you. I love the coloration and how the some of the specimens from this site are translucent. Edited October 31, 2013 by Kevin Anderson Link to comment Share on other sites More sharing options...
MarcoSr Posted October 31, 2013 Share Posted October 31, 2013 That is the only one so far that has a cusplet. I identified them C. maximus based on similarity to the pictures in http://www.elasmo.com/genera/cenozoic/sharks/cetorhinus.html. At that link Jim Bourdon calls the teeth Cetorhinus cf maximus. Note the cf. In the Sharktooth Hill Fauna page Jim Bourdon calls them Cetorhinus sp. and states "Cetorhinus sp — Basking shark Originally identified as C. cf maximus (GUNNER 1765) it now seems more appropriate to go with a more conservative identification." Plus note these teeth do not have a cusplet in the pictures or descriptions. Marco Sr. "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...
Kevin Anderson Posted October 31, 2013 Author Share Posted October 31, 2013 At that link Jim Bourdon calls the teeth Cetorhinus cf maximus. Note the cf. In the Sharktooth Hill Fauna page Jim Bourdon calls them Cetorhinus sp. and states "Cetorhinus sp — Basking shark Originally identified as C. cf maximus (GUNNER 1765) it now seems more appropriate to go with a more conservative identification." Plus note these teeth do not have a cusplet in the pictures or descriptions. Marco Sr. Thanks Marco, I will update my database. How scarce are the ones with a cusplet? of the 20 or so I have so far, it is the only one like with one. Link to comment Share on other sites More sharing options...
MarcoSr Posted October 31, 2013 Share Posted October 31, 2013 Thanks Marco, I will update my database. How scarce are the ones with a cusplet? of the 20 or so I have so far, it is the only one like with one. I have a friend in CA who had a spot in Ant Hill where he found a small number of Cetorhinus with a single cusplet. He brought several of these to the LA museum several years ago. The LA museum went through all their records for fossils everywhere and found nothing and then turned to other sources and the new/recent species dept. of the LA museum and still no luck with a positive id. When I was out in Bakersfield, I found a Cetorhinus with a single cusplet in his spot. See below: I believe that the Cetorhinus with a single cusplet are pretty scarce. The regular Cetorhinus are very common in Bakersfield. My sons and I have several hundred from the Ernst Ranch but none with cusplets. I have almost another hundred from Ant Hill and only have one with a cusplet. In my opinion, your tooth is scarce and is a very nice find. Marco Sr. "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...
Kevin Anderson Posted October 31, 2013 Author Share Posted October 31, 2013 I have a friend in CA who had a spot in Ant Hill where he found a small number of Cetorhinus with a single cusplet. He brought several of these to the LA museum several years ago. The LA museum went through all their records for fossils everywhere and found nothing and then turned to other sources and the new/recent species dept. of the LA museum and still no luck with a positive id. When I was out in Bakersfield, I found a Cetorhinus with a single cusplet in his spot. See below: Cetorhinus sp.1.jpgCetorhinus sp.2.jpgCetorhinus sp.3.jpg I believe that the Cetorhinus with a single cusplet are pretty scarce. The regular Cetorhinus are very common in Bakersfield. My sons and I have several hundred from the Ernst Ranch but none with cusplets. I have almost another hundred from Ant Hill and only have one with a cusplet. In my opinion, your tooth is scarce and is a very nice find. Marco Sr. Thank you, I appreciate all the information you have posted. When I was there with Jon and Jim, we only hunted on the Ernst Ranch, plans to go to Ant Hill were scrapped when we had the opportunity to hunt Slow Curve instead. Kevin Anderson Link to comment Share on other sites More sharing options...
DitchDiggerDos Posted November 24, 2013 Share Posted November 24, 2013 Good finds Kevin! I'm a fan of the translusent dolphin tooth. James Prola Link to comment Share on other sites More sharing options...
Boesse Posted November 25, 2013 Share Posted November 25, 2013 Shimada (2002) and Welton (2013) have published on how variable the dentition of Cetorhinus maximus is (even within a single dentition)... I don't really see the presence of a few teeth with lateral cusplets as a problem. Link to comment Share on other sites More sharing options...
MarcoSr Posted November 25, 2013 Share Posted November 25, 2013 Shimada (2002) and Welton (2013) have published on how variable the dentition of Cetorhinus maximus is (even within a single dentition)... I don't really see the presence of a few teeth with lateral cusplets as a problem. Based upon recent personal communication with Bruce Welton, this will be addressed near term. I don't want to say much more. Marco Sr. "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...
MarcoSr Posted May 4, 2014 Share Posted May 4, 2014 Bruce Welton's paper naming the STH Cetorhinus, C. huddlestoni was published May 1, 2014. Marco Sr. "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...
BelemnBlues Posted May 9, 2014 Share Posted May 9, 2014 Marco, Thanks for pointing that out. Here is a link to the PDF in case others are interested. Luke http://www.nhm.org/site/sites/default/files/pdf/contrib_science/CS522.29-44.pdf A New Fossil Basking Shark (Lamniformes: Cetorhinidae) from the Middle Miocene Sharktooth Hill Bonebed, Kern County, California By Bruce Welton Bruce Welton's paper naming the STH Cetorhinus, C. huddlestoni was published May 1, 2014. Marco Sr. Link to comment Share on other sites More sharing options...
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