I found this shark tooth a few weeks ago along the Calvert Cliffs (Miocene exposure) in Maryland and categorized it as Carcharodon hastalis. Looking at it again, I think it's perhaps Isurus desori. However, while I know C. hastalis can sometimes have cusplets, I'm not sure if that's true for I. desori.   What do you think? Was my C. hastalis ID correct or would you label this one I. desori or something else? Whatever you think the correct ID is, if you could help point me to what you s