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Polydactyly
(lemmy.world)
Polydactyly or polydactylism (from Greek πολύς (polys) 'many', and δάκτυλος (daktylos) 'finger'), also known as hyperdactyly, is an anomaly in humans and animals resulting in supernumerary fingers and/or toes.
I just assume the shape would preclude it. I can't find any records of bats having that defect in their wings and it's supposedly much rarer than humans to have it in their feet.