"Early Primate Evolution: The First Primates" 50 million years "Early Primate Evolution: The First Primates" 50 million years http://anthro.palomar.edu/earlyprimates/early_2.htm http://anthro.palomar.edu/earlyprimates/early_2.htm "Early Primate Evolution: The First Primates" prosimian http://anthro.palomar.edu/earlyprimates/early_2.htm http://anthro.palomar.edu/earlyprimates/early_2.htm "Early Primate Evolution: The First Primates"