Searcher78 Posted July 17, 2019 Share Posted July 17, 2019 What would you classify this tooth as? I have a bunch of these curved teeth? Flag Pond, Maryland. Link to comment Share on other sites More sharing options...
Searcher78 Posted July 17, 2019 Author Share Posted July 17, 2019 Link to comment Share on other sites More sharing options...
Yasei Posted July 17, 2019 Share Posted July 17, 2019 Maybe a Mako Shark? It has that look to it. Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 17, 2019 Share Posted July 17, 2019 It is always best to include location information in the body of the post, as the tags are easily overlooked, and are more for Forum Searches. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted July 17, 2019 Share Posted July 17, 2019 1 hour ago, Searcher78 said: What would you classify this tooth as? I have a bunch of these curved teeth? Flag Pond, Maryland. Hi there, With that deep nutrient groove you will be more likely looking at a Negaprion sp. a lemon shark or a lower Carcharhinid. The lemon sharks are a common find alongside the Carcharhinus sp. requiem sharks that are also abundant. Hard to tell sometimes with worn teeth. Maybe @MarcoSr or @Al Dente can nail it down further. Cheers, Brett Link to comment Share on other sites More sharing options...
caldigger Posted July 17, 2019 Share Posted July 17, 2019 It would be good to include some size reference. ie: having a scaled ruler next to the item. Link to comment Share on other sites More sharing options...
hemipristis Posted July 17, 2019 Share Posted July 17, 2019 Lower Carcharinus teeth. Could be dusky, Caribbean reef, or sicklefin (silky). As Caldigger noted, a scale would be helpful. I've included some pics of lower Carcharinus teeth below, courtesy of elasmo.com. The top is a sicklefin/silky (C. falciformis). The two in the middle are dusky (M/F), C. obscurus. The last is Caribbean reef shark, C. perezii. Note the scale bars. Also note whether there are serrations on your tooth (I cannot tell from the photos). If there are no serrations, then it's a lemon, Negaprion sp. 2 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Peace river rat Posted July 17, 2019 Share Posted July 17, 2019 10 hours ago, hemipristis said: Lower Carcharinus teeth. Could be dusky, Caribbean reef, or sicklefin (silky). As Caldigger noted, a scale would be helpful. I've included some pics of lower Carcharinus teeth below, courtesy of elasmo.com. The top is a sicklefin/silky (C. falciformis). The two in the middle are dusky (M/F), C. obscurus. The last is Caribbean reef shark, C. perezii. Note the scale bars. Also note whether there are serrations on your tooth (I cannot tell from the photos). If there are no serrations, then it's a lemon, Negaprion sp. Informative, i would of tossed on the same shelf / jar as identical. Link to comment Share on other sites More sharing options...
Searcher78 Posted July 17, 2019 Author Share Posted July 17, 2019 Sorry for not posting the scaling. It was a long day yesterday. Thanks Hemipristis for the info. I do have all my similar small teeth grouped together. The tooth is about 13 mm and doesn’t really have serrations. Link to comment Share on other sites More sharing options...
hemipristis Posted July 17, 2019 Share Posted July 17, 2019 2 hours ago, Peace river rat said: Informative, i would of tossed on the same shelf / jar as identical. In large part, I still do that . I can distinguish the larger female dusky lower teeth (2nd photo) due to size and bulk of the root and the stouter blade, but speciatating the rest makes my head hurt. The uppers are difficult enough. 1 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
hemipristis Posted July 17, 2019 Share Posted July 17, 2019 6 hours ago, Searcher78 said: Sorry for not posting the scaling. It was a long day yesterday. Thanks Hemipristis for the info. I do have all my similar small teeth grouped together. The tooth is about 1.3 mm and doesn’t really have serrations. I believe I see worn serrations near the tip (see marked up photo below). They also appear, but are very faint, on the other side as well. This, combined with the size, leads me to believe either C. falciformis (silky) or C. perezii (Caribbean reef). 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Searcher78 Posted July 17, 2019 Author Share Posted July 17, 2019 Yes, using my microscope that I use for coins, it did look like faint or worn serrations, but I wasn't for sure. Didn't know if I was making a stretch for it. On another note, the serrations of my Hemi's look outstanding under this electronic microscope.. Link to comment Share on other sites More sharing options...
MarcoSr Posted July 17, 2019 Share Posted July 17, 2019 9 hours ago, Brett Breakin' Rocks said: Hi there, With that deep nutrient groove you will be more likely looking at a Negaprion sp. a lemon shark or a lower Carcharhinid. The lemon sharks are a common find alongside the Carcharhinus sp. requiem sharks that are also abundant. Hard to tell sometimes with worn teeth. Maybe @MarcoSr or @Al Dente can nail it down further. Cheers, Brett Brett It is impossible to narrow down from pictures a single worn lower shark tooth like in this post to a species. It can even be very difficult to narrow down lower shark teeth to a genus from pictures. It does look like the tooth had serrations in the close-up picture so that would rule out Negaprion. I agree that the tooth is probably a lower Carcharhinus sp. tooth. I have hundreds of extant shark jaws. If I only looked at the tooth features of individual lower teeth and didn't look at other things like the tooth features of the upper teeth, or tooth counts or tooth series and configurations, I can't tell the species (some I can't tell the genus) by the lower tooth features alone and I am looking at pristine teeth that I can take measurements of, with pristine tooth features like serrations . So in my opinion, trying to get high probability ids on worn individual lower shark teeth from pictures is a true guessing game. When I buy extant shark teeth in bulk, I'm not able to id a good number of them with certainty. Marco Sr. 4 "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 17, 2019 Share Posted July 17, 2019 I agree with @MarcoSr that the tooth is most likely a worn lower Carcharhinus sp. From the last photo, there is evidence of worn serrations near the tip. 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...
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