ynot Posted April 8, 2017 Author Share Posted April 8, 2017 @isurus90064, @MarcoSr, Would like Your opinions on this subject please. Tony 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...
MarcoSr Posted April 8, 2017 Share Posted April 8, 2017 2 hours ago, ynot said: @isurus90064, @MarcoSr, Would like Your opinions on this subject please. Tony Tony The largest planus I've personally seen is in the 2 1/4 inch range but I don't get to Bakersfield a lot to collect. Typically a planus over 2 inches is a big planus. The 2.5 inch tooth in question is 100% C. hastalis. My sons and I have thousands of East Coast C. hastalis and we see teeth with curved tips like the tooth in question and we don't have planus on the East Coast. Below is a picture of a hastalis with a curved tip that I had on hand. I have many more and some with more of a curve but don't have the time to take more pictures. Marco Sr. 2 "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...
ynot Posted April 8, 2017 Author Share Posted April 8, 2017 Thanks @MarcoSr 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...
danrpoints Posted July 11, 2019 Share Posted July 11, 2019 Here is my largest planus at 2.24 inches Link to comment Share on other sites More sharing options...
isurus90064 Posted October 21, 2019 Share Posted October 21, 2019 Really late to this party ... Definitely hastalis. the root structure is hastalis, the crown curve is throwing it off, although the distal cutting edge profile on this tooth is purely concave, on planus it is sigmoidal or partially sigmoidal (at a minimum a flattening of the cutting edge profile towards the tip; there are exceptions to that as well). Also, in West Coast Middle Miocene deposits such as STH you don't see as many curved or hooked teeth in hastalis as you do on the east coast contemporaries (or European ones for that matter). However, they do exist and this is a prime example of that. 1 Fossil shark teeth from all over: http://www.thefossilforum.com/index.php?/topic/2380-extraordinary-common-teeth/ Link to comment Share on other sites More sharing options...
ynot Posted October 26, 2019 Author Share Posted October 26, 2019 So, the answer to the original question (how big do planus teeth get?) is .... 2.25 inches. On 10/20/2019 at 7:43 PM, isurus90064 said: Really late to this party ... Definitely hastalis. the root structure is hastalis, the crown curve is throwing it off, although the distal cutting edge profile on this tooth is purely concave, on planus it is sigmoidal or partially sigmoidal (at a minimum a flattening of the cutting edge profile towards the tip; there are exceptions to that as well). Also, in West Coast Middle Miocene deposits such as STH you don't see as many curved or hooked teeth in hastalis as you do on the east coast contemporaries (or European ones for that matter). However, they do exist and this is a prime example of that. Thanks for the input. Very helpful. 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...
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