Earliest Placental Mammal?

[Takama]

http://news.discovery.com/animals/ancestor-of-humans-lived-with-dinosaurs-140114.htm

[Balaur]

Another news item I already knew about. Also, I hate the title! "Ancestor of humans lived with dinosaurs"? Yeah, and the ancestors of procupines and elephants and whales. Sorry, I am just appauled at the title. So misleading.

[Takama]

Yeah I knew that title would raise a few eyebrows

[Paleogene Pals]

Well, technically, even if the first placental mammal did appear in the Cenozoic, it and all of its descendent would still be 'living with dinosaurs.'

[Yutyrannus]

Well, technically, even if the first placental mammal did appear in the Cenozoic, it and all of its descendent would still be 'living with dinosaurs.'

That's not the problem with the title. It's "ancestor of humans" that's annoying.

[Dinoguy2]

Would be nice to have an actual fossil of a Mesozoic placental instead of just playing around with molecular clock calibrations... AFAIK the earliest definitive placental fossil is still Paleocene.