Isurus oxyrhinchus

Great pair of teeth Harry, very rare location too. I'm still missing San Diego from my collection and don't remember ever seeing more than 2-3 ever available.

Nice specimen.

The San Mateo Formation has a lower part which is Late Miocene in age and an upper part which is Early Pliocene. The color of that tooth suggests it is from the upper part (color ranges from a washed-out gray to light blue to steel-blue with some teeth shades of brown). Carcharodon carcharias is actually the most common shark species found with Isurus oxyrhinchus a distant second.

Nice specimen.

The San Mateo Formation has a lower part which is Late Miocene in age and an upper part which is Early Pliocene. The color of that tooth suggests it is from the upper part (color ranges from a washed-out gray to light blue to steel-blue with some teeth shades of brown). Carcharodon carcharias is actually the most common shark species found with Isurus oxyrhinchus a distant second.

I got that tooth from you, 'siteseer', many years ago. It still has a handwritten label (in your handwriting) that says "Early Miocene".

I just checked your letter from 1994, and you do talk about this tooth being from Oceanside and about the Late Miocene/Early Pliocene age of exposures there. I guess the label was a momentary lapse. I will edit this image shortly.