John Hamilton Posted January 2, 2014 Share Posted January 2, 2014 Thanks to Doren I was able to purchase a medium USPS flat rate box of raw matrix from the Miocene, Round Mountain Silt, Sharktooth Hill Fauna from the Ernst Ranch in Bakersfield, California. There were a alot of very well preserved shark, ray, and fish specimens in the matrix. Much to my delight Cetorhinus, Sqautina, and Mustelus were the most abundant of the shark specimens. I was also suprised by the different types and quantities of dermal elements in this matrix. If you place your cursor on a JPEG image you will see the file name which will have the specimen id as best that I can determine and the specimen size. Cetorhinus: Sqautina: Continued on the next post... Link to comment Share on other sites More sharing options...
John Hamilton Posted January 2, 2014 Author Share Posted January 2, 2014 Notorhyncus: Dolphin: Heterodontus anteriors: Continued on the next post... Link to comment Share on other sites More sharing options...
John Hamilton Posted January 2, 2014 Author Share Posted January 2, 2014 Heterodontus laterals: Possible bird claw: Stay tuned for more photos... Link to comment Share on other sites More sharing options...
obsessed1 Posted January 2, 2014 Share Posted January 2, 2014 (edited) Nice finds! I believe the only reconized cow shark from that location is Hexanchus andersoni. Edited January 2, 2014 by obsessed1 Link to comment Share on other sites More sharing options...
John Hamilton Posted January 2, 2014 Author Share Posted January 2, 2014 Nice finds! I believe the only reconized cow shark from that location is Hexanchus andersoni. Thanks! I based all of my ID's on what was available at elasmo.com so you may be correct. Link to comment Share on other sites More sharing options...
MarcoSr Posted January 2, 2014 Share Posted January 2, 2014 John Really nice pictures. Really nice specimens. I think that the Heterodontus tooth, sp001, labeled as an anterior tooth might be a lateral tooth possibly of a juvenile. 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...
jcbshark Posted January 3, 2014 Share Posted January 3, 2014 Beautiful pics and finds as usual! Every once in a great while it's not just a big rock down there! Link to comment Share on other sites More sharing options...
John Hamilton Posted January 3, 2014 Author Share Posted January 3, 2014 John Really nice pictures. Really nice specimens. I think that the Heterodontus tooth, sp001, labeled as an anterior tooth might be a lateral tooth possibly of a juvenile. Marco Sr. Marco, I was wondering about that one too because it displays charateristics of both a lateral and anterior tooth. The only reason I called it an anterior tooth was based on how I assumed the root was contructed. I'll try to post a picture of the bottom of the tooth later today. Link to comment Share on other sites More sharing options...
John Hamilton Posted January 3, 2014 Author Share Posted January 3, 2014 Beautiful pics and finds as usual! Thanks Jeff! Link to comment Share on other sites More sharing options...
MarcoSr Posted January 3, 2014 Share Posted January 3, 2014 Marco, I was wondering about that one too because it displays charateristics of both a lateral and anterior tooth. The only reason I called it an anterior tooth was based on how I assumed the root was contructed. I'll try to post a picture of the bottom of the tooth later today. John If it has a V shaped root, that would change my opinion. It might be from one of the transition files that transition between anterior and lateral teeth where the teeth have an intermediate morphology. Young sharks do have more cusplets than adults. 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...
cowsharks Posted January 3, 2014 Share Posted January 3, 2014 Nice finds! I believe the only reconized cow shark from that location is Hexanchus andersoni. John, your partial cowshark is a lower female Hexanchus andersoni. I have seen what I believe are in fact 7-gill Notorynchus cowshark teeth (lowers) from Shark Tooth Hill, but they are quite rare; probably only located in one of the formations/locations/quarries. Daryl. Link to comment Share on other sites More sharing options...
John Hamilton Posted January 3, 2014 Author Share Posted January 3, 2014 John, your partial cowshark is a lower female Hexanchus andersoni. I have seen what I believe are in fact 7-gill Notorynchus cowshark teeth (lowers) from Shark Tooth Hill, but they are quite rare; probably only located in one of the formations/locations/quarries. Daryl. Thanks Daryl! Link to comment Share on other sites More sharing options...
John Hamilton Posted January 3, 2014 Author Share Posted January 3, 2014 John If it has a V shaped root, that would change my opinion. It might be from one of the transition files that transition between anterior and lateral teeth where the teeth have an intermediate morphology. Young sharks do have more cusplets than adults. Marco Sr. Marco, It has no root left at all but in comparing it to the other anterior teeth it looks like it would have had the v-shaped root. Link to comment Share on other sites More sharing options...
MarcoSr Posted January 3, 2014 Share Posted January 3, 2014 Marco, It has no root left at all but in comparing it to the other anterior teeth it looks like it would have had the v-shaped root. John With its 3mm size and V shaped root, it is probably from one of the anterior to lateral transition files. 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...
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