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DevilDog

Why does this C.carcharius appear to have cusplets?

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DevilDog

C.carcharius lower found on Topsail Island, NC.

 

Approximately 2.5 cm slant height (juvenile?)

 

Appears to have cusplets. Why? 

0902191745a~2_resized.jpg

0902191746~2_resized.jpg

0902191746b~2_resized.jpg

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TyBoy

Does not look  like a C.carcharius.  Most lo likely a juvie Megatoothed shark like megalodon

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The Jersey Devil

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.

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Plax

root looks too thick for C. carcharius. More likely a juvie angustidens or auriculatis .

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The Jersey Devil
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.

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DevilDog

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.

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isurus90064

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.

 

post-92-12634343908809.jpg.4bcd2334a8f3b37f774aa0c581374db8.jpg

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Harry Pristis

 

Juvenile lower tooth from siteseer

 

:

 

 

shark_carcharias_smallest.JPG

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DevilDog

Fantastic tooth! 

 

I used to live in Oceanside... Is that a beach-find?

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isurus90064

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.

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isurus90064

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).

 

 

 

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