A close relative of the strange and very cute dorcopsins (forest-wallabies), today found only in New Guinea. They are very under-studied - we don't even know what they eat, much about how they move, etc.

I agree though, we still know very little. Especially with regards to the variation within Sthenurinae, which often gets treated as a unit when talking about locomotion etc but is surely very varied. I'd be very keen to chat about them sometime!

You make very good points, I just can't see how they wouldn't topple forwards! Strange animals.

Looks great! I love their crazy hands.
If I had a note it would be that it's hard to see them leaning so far forward without a big tail to counterbalance, and the pelvic morphology would support a more upright stance...