Theriiformes

Theriiformes is a subclass of mammals. The term was coined in 1997 by McKenna & Bell in their classification of mammals.[1] In the strict sense, it is defined as all mammals more closely related to therians than to monotremes.

Mammaliaformes	†Morganucodontidae   Mammalia    Yinotheria→Monotremata   Theriiformes   †Allotheria→†Multituberculata   Holotheria   †Kuehneotheria   Trechnotheria   †Zhangheotherium †("Symmetrodonta")    Cladotheria    †Dryolestoidea    Zatheria    †Peramura   Tribosphenida   †Aegialodontia    Theria    Metatheria→Marsupialia     Eutheria→Placentalia

Theriiformes Temporal range: Late Triassic - Holocene, 220–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Two humans from Akha tribe in northern Thailand
Kangaroo with her joey
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Subclass:	Theriiformes McKenna & Bell, 1997
Infraclasses
Holotheria †Allotheria

References

1. McKenna, Malcolm; Bell, Susan (March 15, 1997). Classification of Mammals Above the species Level (Hardback) |format= requires |url= (help) (first ed.). New York City: Columbia University Press. ISBN 978-0231110129.