Assertion: ossified patella | /r/CapableOf | evolve within eutheria
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text: Our results suggest that the ossified patella evolved only once within Eutheria and (as far as is currently known) has only been lost by the bat genus Pteropus (not counting groups which have lost hindlimbs, e.g. Trichechus manatus/crown Sirenia, Tursiops truncatus/crown Cetacea).