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How are Docodonts, Triconodonts, Symmetrodonts, Multituberculates, Monotremes, Pantotheres, Placentals and Marsupials related to the mammal-like reptile,...

How are Docodonts, Triconodonts, Symmetrodonts, Multituberculates, Monotremes, Pantotheres, Placentals and Marsupials related to the mammal-like reptile, Diarthrognathus from the Triassic?

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Answer #1

Diarthrognathus possesses a jaw structure that is similar to both mammals and more basal synapsids. Its primitive jaw joint is located between the quadrate and articular bones, and its derived, mammalian jaw joint is located between the squamosal and dentary bones.

And all the given species are of mammals.

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