SharkySarah Posted October 23, 2020 Share Posted October 23, 2020 I’m currently looking on fossil guy but I’m stumped. Ideas? Link to comment Share on other sites More sharing options...
Notidanodon Posted October 23, 2020 Share Posted October 23, 2020 another carcharinus brachyurus, so you dont need to post more ID threads, here i will explain to you the difference between the two carcharinus species there 1. generally slightly less comon, as you can see here, the part of the blade that runs along the root remains thin, and when it reaches the main blade, there is a significant angle meanwhile brachyurus has a thicker blade by the root and doesnt form such a significant angle, also looking from the front, the root generally looks a lot bigger 5 Link to comment Share on other sites More sharing options...
SharkySarah Posted October 23, 2020 Author Share Posted October 23, 2020 @will stevenson thank you so much!!!! That actually really helps me a lot!!! 1 Link to comment Share on other sites More sharing options...
Notidanodon Posted October 23, 2020 Share Posted October 23, 2020 1 minute ago, SharkySarah said: @will stevenson thank you so much!!!! That actually really helps me a lot!!! no problem 2 Link to comment Share on other sites More sharing options...
sixgill pete Posted October 24, 2020 Share Posted October 24, 2020 I disagree with this tooth being Carcharhinus brachyurus. I believe it is a lower carcharhinus, possibly C. obscurus. But that is speculation on my part. Carcharhinids are extremely difficult to I.D. from single isolated teeth as many of the different species (35? extant and 8 extinct) have teeth so similar it is almost impossible to differentiate them. Especially the lower teeth. 4 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...
hemipristis Posted October 24, 2020 Share Posted October 24, 2020 14 hours ago, will stevenson said: another carcharinus brachyurus, so you dont need to post more ID threads, here i will explain to you the difference between the two carcharinus species there 1. generally slightly less comon, as you can see here, the part of the blade that runs along the root remains thin, and when it reaches the main blade, there is a significant angle meanwhile brachyurus has a thicker blade by the root and doesnt form such a significant angle, also looking from the front, the root generally looks a lot bigger Are those from fossil guy? I believe his IDs are mistaken. Those 'brachyurous' teeth look more like C. perezii. I'd recommend elasmo.com, or the Lee Creek Vol. III, which is available free online. Below: C. brachyurus. Below: C. falciformis vs. C. perezii 5 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Notidanodon Posted October 24, 2020 Share Posted October 24, 2020 11 hours ago, sixgill pete said: I disagree with this tooth being Carcharhinus brachyurus. I believe it is a lower carcharhinus, possibly C. obscurus. But that is speculation on my part. Carcharhinids are extremely difficult to I.D. from single isolated teeth as many of the different species (35? extant and 8 extinct) have teeth so similar it is almost impossible to differentiate them. Especially the lower teeth. 1 hour ago, hemipristis said: Are those from fossil guy? I believe his IDs are mistaken. Those 'brachyurous' teeth look more like C. perezii. I'd recommend elasmo.com, or the Lee Creek Vol. III, which is available free online. Below: C. brachyurus. Below: C. falciformis vs. C. perezii Ok guys I was probably wrong, I was just going off my little understanding from fossil guy, if his ID’s were wrong then mine are too if they’re wrong, shouldn’t somebody tell him? 2 Link to comment Share on other sites More sharing options...
Shellseeker Posted October 24, 2020 Share Posted October 24, 2020 Sarah, I have been hunting Bone Valley Florida for more than 10years, some years 4 times a week, 9 months a year. A hunting friend back 7-8 years ago always counted the number of small shark teeth he found on a single trip. His record was 867 teeth found on a single trip. I have found hundreds of thousands if not millions of small shark teeth, 20% of which look like your example. I can not tell the difference between a Caribbean reef shark, a silky, a bull or dusky shark tooth. They all look the same to a novice eye. @sixgill pete summarized perfectly. Quote Carcharhinids are extremely difficult to I.D. from single isolated teeth as many of the different species (35? extant and 8 extinct) have teeth so similar it is almost impossible to differentiate them. Especially the lower teeth. "extremely difficult" means that even the experts can be wrong. So what is a person to do , who is not an expert, does not care to take the time to become one ? 1) Accept, like I do, that the teeth are Carcharhinids without lower specificity, or 2) Go to elasmo.com and become an expert yourself on variations on Carcharhinids teeth (this may take some time) or 3) Look for multiple experts, some of whom are likely to disagree. Welcome to the Fossil Forum. Jack 4 The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
hemipristis Posted October 25, 2020 Share Posted October 25, 2020 17 hours ago, Shellseeker said: Sarah, I have been hunting Bone Valley Florida for more than 10years, some years 4 times a week, 9 months a year. A hunting friend back 7-8 years ago always counted the number of small shark teeth he found on a single trip. His record was 867 teeth found on a single trip. I have found hundreds of thousands if not millions of small shark teeth, 20% of which look like your example. I can not tell the difference between a Caribbean reef shark, a silky, a bull or dusky shark tooth. They all look the same to a novice eye. @sixgill pete summarized perfectly. "extremely difficult" means that even the experts can be wrong. So what is a person to do , who is not an expert, does not care to take the time to become one ? 1) Accept, like I do, that the teeth are Carcharhinids without lower specificity, or 2) Go to elasmo.com and become an expert yourself on variations on Carcharhinids teeth (this may take some time) or 3) Look for multiple experts, some of whom are likely to disagree. Welcome to the Fossil Forum. Jack well said 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
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