Tribosphenida Fossil range: Middle Jurassic-Recent
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Subclass:	Theriiformes
Infraclass:	Holotheria
(unranked):	sublegion Zatheria
(unranked):	Tribosphenida McKenna, 1975
Clades
Hypomylos Necrolestidae Aegialodontia, Supercohort Theria, Supercohort Placentalia, Cohort Marsupialia, Cohort

Tribosphenida is a group (infralegion) of mammals that is defined as including the ancestor of Hypomylos, Necrolestidae, Aegialodontia and supercohortTheria (living Therians plus all of its descendants).

[edit] External links

• MESOZOIC MAMMALS; Stem zatherians, zatherians & Peramuridae, an internet directory
• THERIA И MARSUPIONTA
• Infralegion Tribosphenida - Hierarchy - The Taxonomicon

[edit] Further reading

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.

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