Tribosphenida
Tribosphenida is a group (infralegion) of mammals that includes the ancestor of Hypomylos, Aegialodontia and Theria (the last common ancestor of marsupials and placentals plus all of its descendants). Its current definition is more or less synonymous with Boreosphenida.[1][2]
| Tribosphenida Temporal range: Middle Jurassic - Present,
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| A modern tribosphendian, the Kangaroo with her joey | |
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| Eomaia, an ancient tribosphendian | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Zatheria |
| Clade: | Tribosphenida McKenna, 1975 |
| Clades | |
| Synonyms | |
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Boreosphenida | |
References
- ↑ Kielan-Jaworowska, Zofia; Cifelli, Richard L; Luo, Zhe-Xi (2004). Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure. New York: Columbia University Press. ISBN 978-0-231-11918-4.
- ↑ Lua error in Module:Citation/CS1/Identifiers at line 630: attempt to index field 'known_free_doi_registrants_t' (a nil value).