The Evolution of Dentition

The diversity that existed prior to the end of the eocene and entering into the olgocene all but disappeared. And especially with regard to the primates, only one tooth type seems to have remained. And that tooth type eventually led to all of us. We may not be here if this extinction event had wiped out our primate ancestors. But ultimately, even though it dropped the diversity down to almost nil, some organism survived. Those organisms wih had a very particular type of tooth that ultimately led to a new diversity righ. It's so much more than just anatomy. It is ecology.