Wombat Pouch

The difference between the two pouches is not rotation, it's the position of the opening relative to the front and rear of the pouch. The common ancestor likely had a small pouch with a rearward opening, in Kangaroos the pouch lengthened with the opening sitting to the front, in wombats it lengthened with opening remaining rearward.Probably.

By stepwise changes in the growth rate/time of the sections that form the front and rear flaps of the pouch, of course.

As usual when answering your posts I find myself wondering whether you can actually read. Also, will you please start a thread on your marsupial ideas so we can discuss them properly? This is simply not true. If I don't witness a car crash that doesn't suddenly make it being caused by a giant picking up the two cars and slamming them together suddenly likely. We don't need to directly witness things to understand what is likely, or unlikely, to occur. Except, as every evolutionist in this thread has said, we don't think there was any spinning at all. How is it that you've managed to post in this thread without understanding that? And that evidence clearly shows that organisms that share a common ancestor have differences in the shape, size and positioning of opening of their pouch. This is still as untrue as every other time you've asserted it. Will you please start a thread where we can discuss it.