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LemursRideBigWheels t1_iwpk1mz wrote

Think a vertical orientation of the hand vs a more canted orientation of the hand. Neither ball their hand up or place their palm on the ground while locomoting — they use the middle set of knuckles for support. Interestingly, what you describe is somewhat akin to what’s seen with orangutans when on the ground or arboreal monkeys respectively.