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The path to mammalness is well documented in the fossil record of Therapsida. Cynodontia is a group that includes living mammals and a series of stem fossil taxa that are individualized under the paraphyletic name of non...

The inherent vulnerability of elasmobranchs (i.e., sharks, skates, rays) to extinction stems from their conservative life history traits, particularly those related to reproduction. Traditional studies on elasmobranch re...