Originally posted by rogue06
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Their limbs are also homologous with those of other terrestrial mammals including one bone in the upper limb, two in the lower part, a cluster of bones comprising a wrist and five digits.
Much like many whales, modern manatees don't have hindlimbs (although your source shows that their early ancestors did) but they still have tiny, atrophied, rudimentary pelvis. And these pelvis vestigial hip sockets for non-existent femurs.
More evidence that modern manatees evolved from terrestrial ancestors to go along with the fossil record showing that the oldest ancestors (such as, say, Potamosiren) had full-sized hindlimbs ...
Blessings,
Lee
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