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How could Postosuchus have sprayed mammal like
urine, when all living archosaurs (and most diapsids) are uricotelic? Also, I
have a question that I think is interesting: If living synapsids
(mammals) are not uricotelic but evolved from basal ammniotes along with
diapsids, why would they have ever lost something as advantageous in terms of
water retention as uricotelism?
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