Cynodonta contains the most mammal-like of the non-mammaliantherapsids, which are sometimes termed 'mammal-like reptiles'. The most derived cynodonts are found within a taxon called Eucynodontia, which also contains the members of Mammalia.
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... function in both sexes, to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The external urethral sphincter is th ...