DevilDog Posted September 3, 2019 Share Posted September 3, 2019 C.carcharius lower found on Topsail Island, NC. Approximately 2.5 cm slant height (juvenile?) Appears to have cusplets. Why? Link to comment Share on other sites More sharing options...
TyBoy Posted September 3, 2019 Share Posted September 3, 2019 Does not look like a C.carcharius. Most lo likely a juvie Megatoothed shark like megalodon Link to comment Share on other sites More sharing options...
The Jersey Devil Posted September 3, 2019 Share Posted September 3, 2019 I agree it is a C. carcharias. Many juvenile sharks have features that differ from there adult forms. GW juveniles may have cusplets and ragged, irregular serrations. 1 “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
Plax Posted September 4, 2019 Share Posted September 4, 2019 root looks too thick for C. carcharius. More likely a juvie angustidens or auriculatis . Link to comment Share on other sites More sharing options...
The Jersey Devil Posted September 4, 2019 Share Posted September 4, 2019 1 hour ago, Plax said: root looks too thick for C. carcharius. More likely a juvie angustidens or auriculatis . Lower anterior GWs can have some very thick roots. “You must take your opponent into a deep dark forest where 2+2=5, and the path leading out is only wide enough for one.” ― Mikhail Tal Link to comment Share on other sites More sharing options...
DevilDog Posted September 4, 2019 Author Share Posted September 4, 2019 I am confident in my ID of this tooth as C.carcharius and not one of the megatooth species based on the lack of a bourrelet and comparison with other C.carcharius lowers. Link to comment Share on other sites More sharing options...
isurus90064 Posted September 24, 2019 Share Posted September 24, 2019 I second DevilDog here, that is a lower C. carcharias, the cusps are common in juveniles and can persist even in larger teeth. Here's a chilean white shark that is ~2" - 5+cm. White shark teeth that are from smaller individuals have lowers that have very pronounced D-shaped X-sections, but they gain in width and flatten out a little relative to the size as they get older. 3 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...
Harry Pristis Posted September 24, 2019 Share Posted September 24, 2019 Juvenile lower tooth from siteseer : 2 http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
DevilDog Posted September 24, 2019 Author Share Posted September 24, 2019 Fantastic tooth! I used to live in Oceanside... Is that a beach-find? Link to comment Share on other sites More sharing options...
isurus90064 Posted September 25, 2019 Share Posted September 25, 2019 Those teeth come from a gravel quarry that was very active in the 70's. The quarry is located just south of the San Luis Rey river and east of the 5 freeway. The last time I drove by there it seemed like it was pretty built up with new homes (the east rim that is; Harbor Cliff Way), although it also looked like the quarry itself was still untouched by development. 2 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...
isurus90064 Posted September 25, 2019 Share Posted September 25, 2019 Here's a link to a number of teeth I've collected from there (click the arrow in the top right corner and it will take you to page 16, then scroll around a bit). 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...
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