Shark Tooth from Sharktooth Hill, CA.

[Jeffrey P]

I found this tooth at Sharktooth Hill near Bakersfield, CA. It is Miocene from the Round Mountain Silt. It doesn't quite match any of the specimens at Elasmo.com with Alopias latidens being the closest. It is one inch tall. Any helpful feedback would be very appreciated. Thanks and have a good one. 

[Darktooth]

Hi Jeff! To me it looks like Isurus retroflexus. Hope you are enjoying your time there.

[Jeffrey P]

1 minute ago, Darktooth said:

Hi Jeff! To me it looks like Isurus retroflexus. Hope you are enjoying your time there.

Thanks. I consider that a possibility too. 

[Meganeura]

I'd also consider Carcharodon hastalis which are found in STH. 

[Darktooth]

29 minutes ago, Meganeura said:

I'd also consider Carcharodon hastalis which are found in STH. 

I lean towards retroflexus due to the cusps, and the short wide blade.

[Meganeura]

2 minutes ago, Darktooth said:

I lean towards retroflexus due to the cusps, and the short wide blade.

Fair point - though I have a small posterior hastalis with similarly sized cusps. Smaller/thinner blade, though. 

[Notidanodon]

37 minutes ago, Darktooth said:

I lean towards retroflexus due to the cusps, and the short wide blade.

Cusps can occur on hastalis too, see this nice example on Elasmo  

 

@Jeffrey P could I please have more views of the root, currently the root structure more closely resembles hastalis to me, Retroflexus would have a more labio-lingually compressed form (a more ridge-like and less rounded form)