[GreenFreeper]

No mention of how this new find, beaver-tail otter-similar, falls out on the monotreme-marsupial-placental typology (is it too early?) or what its ear/jaw bones are like.

Probably is a little early but will beinteresting to see when the work is done. I always wonder, though, how monotreme-marsupials would be viewed if none were extant today. We would have any clue as to how they functioned?

[VadeRetro]

Without soft tissue or extant forms, the fossil record of monotremes and marsupials would be a much greater puzzle, no question.

[PatrickHenry]

I always wonder, though, how monotreme-marsupials would be viewed if none were extant today.

Your interest in Jurassic beaver is noted.

[RightWingAtheist]

Here's a brief but good layman's page looking at what we know about pre-Eutheric mammals.