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(which had fully formed by 100 Mya) twice, once just after the K'''-'''Pg extinction, and then again, later in the Palaeogene. This also implies that limblessness evolved independently three times, a finding that contrasts the morphological theory that limbed amphisbaenians are the most basal. This widespread dispersal is suggested to have occurred by rafting - natural erosion or a storm event loosened

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