jan 1, 1966 - Mesonychia as closest relatives of whales
Description:
Van Valen (1966), suggested that theclosest relatives of whales were the Mesonychia—a group of carnivorous condylarths (ancient hoofed mammals) that resemble early cetaceans in the morphology of their teeth.
Added to timeline:
Date:
jan 1, 1966
Now
~ 59 years ago