Tribosphenida

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Theria

Tribosphenida. Tribosphenida is a group (infralegion) of mammals that is defined as including the ancestor of Hypomylos, Necrolestidae, Aegialodontia and Theria (the last common ancestor of marsupials and placentals plus all of its descendants).

External links[edit] Further reading[edit] McKenna, Bell: Classification of Mammal: Above the Species Level Teun van Rheede, Trijntje Bastiaans, David N Boone, S Blair Hedges, Wilfried W de Jong, Ole Madsen: The Platypus is in its Place: Nuclear Genes and Indels Confirm the Sister Group Relation of Monotremes and Therians.