While collecting teeth I was surprised when what I thought was a ventral mako/ great white tooth had serrations (strong near the base, fine near the middle, nothing at the tip). At first I thought this was a damaged hemipristis, but the shape of the tooth was different and serrations were smaller. The tooth seems to be essentially the same as an unserrated mako/ great white, however the serrations are obvious.
Is this a transitional tooth between fossil mako and modern great white? Or does this represent a totally different species?