Pantotheria

Pantotheria

Pantotheria (class Mammalia, subclass Theria) An extinct infraclass of primitive Middle and Upper Jurassic mammals, known from N. America, Europe, and E. Africa. They were egg-laying insectivores of shrew-like appearance, and are believed, on the basis of the structure of the jaw and teeth, to include the ancestors of all later placental and marsupial mammalian groups. They were distributed widely by the later Jurassic, were numerous, and were varied in form.

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MICHAEL ALLABY. "Pantotheria." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Pantotheria." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O8-Pantotheria.html

MICHAEL ALLABY. "Pantotheria." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Pantotheria.html

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Pantotheria

Pantotheria (class Mammalia, subclass Theria) Extinct infraclass of primitive Middle and Upper Jurassic mammals, known from N. America, Europe, and E. Africa. They were egg-laying insectivores of shrew-like appearance, and are believed, on the basis of the structure of the jaw and teeth, to include the ancestors of all later placental and marsupial mammalian groups. By the later Jurassic, they were widely distributed, numerous, and varied in form.

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AILSA ALLABY and MICHAEL ALLABY. "Pantotheria." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Pantotheria." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-Pantotheria.html

AILSA ALLABY and MICHAEL ALLABY. "Pantotheria." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Pantotheria.html

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