MarcoSr Posted July 12, 2013 Share Posted July 12, 2013 I occasionally find in the Miocene of Virginia juvenile Makos with cusplets. Here is a real nice one that I found today. 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...
RickNC Posted July 12, 2013 Share Posted July 12, 2013 Really cool tooth Marco. Thanks for sharing. Link to comment Share on other sites More sharing options...
Auspex Posted July 12, 2013 Share Posted July 12, 2013 That's a real beauty! What is its size? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Shellseeker Posted July 12, 2013 Share Posted July 12, 2013 (edited) Nice Tooth and I know the thrill that comes with finding such a rare example -- Back in April I found a Meg with cusps -- different looking cusps , but cusps all the same. http://www.thefossilforum.com/index.php?/topic/36612-large-shark-teeth/ I would love to find a Mako like your and put them together!! Congrats on the find... SS Edited July 12, 2013 by Shellseeker The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
edd Posted July 12, 2013 Share Posted July 12, 2013 I have lemmon shark teeth with cusps " We're all puppets, I'm just a puppet who can see the strings. " Link to comment Share on other sites More sharing options...
MarcoSr Posted July 12, 2013 Author Share Posted July 12, 2013 That's a real beauty! What is its size? 30 mm "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 July 12, 2013 Author Share Posted July 12, 2013 I have lemmon shark teeth with cusps Can you post a few pictures of them? "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...
Auspex Posted July 12, 2013 Share Posted July 12, 2013 That's a real beauty! What is its size? 30 mm Larger than I has assumed! Big 'baby'! "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
MarcoSr Posted July 12, 2013 Author Share Posted July 12, 2013 Larger than I has assumed! Big 'baby'! This one is similar in size to others that I find. Some of the Makos with cusplets also have fine serrations. This tooth may have some fine serrations by the root. I say "may" because the blade is razor sharp and what looks like serrations could be serrations or just nicks. 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...
edd Posted July 13, 2013 Share Posted July 13, 2013 . " We're all puppets, I'm just a puppet who can see the strings. " Link to comment Share on other sites More sharing options...
MikeDOTB Posted July 13, 2013 Share Posted July 13, 2013 Nice tooth Marcos! DO, or do not. There is no try. Link to comment Share on other sites More sharing options...
masonboro37 Posted July 13, 2013 Share Posted July 13, 2013 Splendid! Process of identification "mistakes create wisdom". Link to comment Share on other sites More sharing options...
MakoMeCrazy Posted July 13, 2013 Share Posted July 13, 2013 Nice find! Link to comment Share on other sites More sharing options...
Diego Posted July 13, 2013 Share Posted July 13, 2013 For serrated mako teeth and cusps Google for isurus Escheri . Link to comment Share on other sites More sharing options...
Diego Posted July 13, 2013 Share Posted July 13, 2013 Do you meen something like this . Link to comment Share on other sites More sharing options...
Diego Posted July 13, 2013 Share Posted July 13, 2013 THE serrations are much beter to see here Link to comment Share on other sites More sharing options...
MarcoSr Posted July 13, 2013 Author Share Posted July 13, 2013 For serrated mako teeth and cusps Google for isurus Escheri . Do you meen something like this . THE serrations are much beter to see here My son Mel and I have thought for a while that these finely serrated Makos with cusplets could be I. Escheri. The ones that we find resemble both of your photos. However, from the publications that I have read, the I. Escheri species has been described as an Eastern Atlantic species. So either the experts need to revise their thinking and say I. Escheri also occurred in the Western Atlantic (Maybe there is a paper saying that now but I haven't read it) or what I am finding is something different. 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 July 14, 2013 Author Share Posted July 14, 2013 I want to point out that there are other possible explanations for these finely serrated teeth with cusplets. According to Bretton W. Kent in Fossil Sharks of the Chesapeake Bay Region 1994, "occasional specimens of I. hastalis have coarse serrations on each shoulder" and " Juvenile I. hastalis usually have a single low, broad cusplet on each shoulder." However the teeth that we have found have a wavy cutting edge with fine serrations which extend beyond the shoulder. Kent also states that "Juvenile C. carcharias teeth differ from those of adults in that they may bear cusplets ....... or have partially serrate cutting edges." However we don't find adult C. carcharias teeth where we find these other teeth and C. carcharias is very rare in the early and middle Miocene of the Chesapeake Bay region where we find these teeth. So there are other known possibilities for the teeth that we have found other than I. Escheri. 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...
Auspex Posted July 14, 2013 Share Posted July 14, 2013 Seems these teeth are usually from late zones; I've come to think of them as "transitional" teeth (though with no empirical evidence in support of such a view). "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
MarcoSr Posted July 14, 2013 Author Share Posted July 14, 2013 Seems these teeth are usually from late zones; I've come to think of them as "transitional" teeth (though with no empirical evidence in support of such a view). I agree that they are "transitional" teeth", either I. Escheri, another dead-end species, or in the great white lineage. 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...
sixgill pete Posted July 16, 2013 Share Posted July 16, 2013 Very nice tooth Marco. It is very similar to the escheri's I have from the Netherlands. 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...
beachbum513 Posted July 31, 2013 Share Posted July 31, 2013 where in Virginia were you? Link to comment Share on other sites More sharing options...
MarcoSr Posted August 1, 2013 Author Share Posted August 1, 2013 where in Virginia were you? Along the Potomac River. 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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