Theria

style="background:#Template:Taxobox colour;"\|Therian; Fossil range: Early Cretaceous - Recent
	; House Mouse, Mus musculus
style="background:#Template:Taxobox colour;" \| Scientific classification
Kingdom:	Animalia;
Phylum:	Chordata;
Class:	Mammalia;
Subclass:	Theria; Parker & Haswell, 1897
Infraclasses
	Metatheria ; Eutheria ;

Theria (Template:PronEng, from the Greek θηρίον, wild beast) is a subclass of mammals^[1] that give birth to live young without using a shelled egg, including both eutherians (placental mammals) and metatherians (marsupials and their ancestors).

Extent[edit | edit source]

The subclass includes humans. They have external ears, most can suckle on a nipple, and have an ankle specialized for power and range of motion. Therians are often classified by their specialized dentition.

Almost all currently extant (not extinct) mammals are therians. The only exceptions are the platypus and the echidnas (spiny anteater), both of which are prototherian monotremes.

Bibliography[edit | edit source]

Vaughan, Terry A., James M. Ryan, and Nicholas J. Czaplewski. 2000. Mammalogy: Fourth Edition. Saunders College Publishing, 565 pp. ISBN 0-03-025034-X

References[edit | edit source]

↑ Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. "Subclass Theria". Animal Diversity Web.

External links[edit | edit source]

Template:WH Template:WS Template:Jb1

bg:Живородни бозайници ca:Teri de:Theria eo:Vivonaskuloj eu:Terio ko:수아강 hr:Theria it:Theria lij:Theria hu:Elevenszülő emlősök nl:Theriiformes oc:Theria simple:Theria fi:Istukkanisäkkäät sv:Theria th:เธอเรีย uk:Звірі

[1] Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. "Subclass Theria". Animal Diversity Web.

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