I think this is the new arrangement of palmar pads for male forepaws.

On another note, after doing tons of research into apes and monkeys (by which I mean reading Wikipedia articles and watching bunches of YouTube videos) I realize that comparing yinrih to possums is redundant as the features of possums I was borrowing (prehensile tail, furless digits, and carrying young on the back) are already present in monkeys, hence why I've settled on “monkey fox” as their nickname.