Marsupial evolution

The topic IS the comparison of marsupial and placental animals!If you bring this same thing up here or in any other thread you'll get a time out. There will be no further warnings.It is, of course, perfectly fine to open another thread on the coloration or stripes topic. I suggest you do so and, unless you have something to contribute, stay out of this one.

I think I'll have to argue in non admin mode to be a bit fair. Touche! So far in this thread the traits mentioned show that the marsupials all group more closer to each other than to their superficial look-a-like mammals.Now it is your turn to supply traits that show the opposite.I guess someone very foolish would start with something like 4-legs, but you've been through this before so you wouldn't do that, would you?Edited by NosyNed, : No reason given.

quote:

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Eomaia and Sinodelphys from the Lower Cretaceous of Liaoning (Fig. 3) are the most primitive fossils that can be unequivocally placed onto the placental lineage and the marsupial lineage. Their anatomy presents the ancestral conditions from which the later placentals and marsupials have evolved.

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This is from:
http://criticaltransitions.org/poster1.htmlIt took a bit of googling around to find it.It appears that it is incorrect to suggest that placentals evolved from marsupials. They did, as you suggest, have a common ancestor.Now I'd like to know more about what that ancestor was like.