<HTML>Some of the mesonychids were actually bear sized predators: e.g g.Pachyhyaena, although most were around wolf sized such as g.Ancalagon and g.Sinonyx, as you have pointed out.
The Artiodactylae and Perissodactylae (odd and even toed ungulates) evolved in Early-Mid Eocene from the Condylarthra. Cetaceae evolved in the Paleocene (hope that clears up what I wrote...it's what I meant
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Pakicetus(check for typos!!!!). Yes,g. Sinonyx is the earliest that we know of as you said. I was using it as an example only, not as a type...of origin. g.Pakicetus is the earliest of the identifiably whale like creatures.Sinonyx is still a mesonychid.
Recent......yes it is. When you deal in time periods of hundreds and even thousands of millions of years, 60Ma or so is just the equivalent of a few minutes
.You need to get out more Mikey....smell and feel the "time breezes", instead of staying stuck in that Pleistocene/Holocene rut
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