Trechnotheria Fossil range: Middle Jurassic-Recent
Scientific classification
Class:	Mammalia
Subclass:	Theriiformes
(Unranked) :	Holotheria
(Unranked) :	Trechnotheria McKenna, 1975
Subdivisions:	Cladotheria Symmetrodonta

Trechnotheria is a proposed clade of mammals that would include the symmetrodonts, Spalacotheriids, dryolestids and therians as one group. This clade excludes monotremata.

SourcesEdit

http://www.dinodata.org/index.php?option=com_content&task=view&id=8532&Itemid=144

Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo, Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure (New York: Columbia University Press, 2004), 14, 530.

http://www.taxonomy.nl/taxonomicon/TaxonTree.aspx?id=108310

See alsoEdit

• Allotheria
• Cladotheria
• Holotheria

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