| Tribosphenidans Temporal range:
| |
|---|---|
| |
| Eomaia fossil | |
| |
| Kangaroo with her joey | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Clade: | Zatheria |
| Clade: | Tribosphenida McKenna, 1975 |
| Clades | |
| |
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). It belongs to the group Zatheria.[1] The current definition of Tribosphenida is more or less synonymous with Boreosphenida.[2][3]
- ^ Panciroli E; Roger B.J. Benson; Richard J. Butler (2018). "New partial dentaries of amphitheriid mammalian Palaeoxonodon ooliticus from Scotland, and posterior dentary morphology in early cladotherians". Acta Palaeontologica Polonica. 63 (2). doi:10.4202/app.00434.2017.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ 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.
- ^ Luo, Zhe-Xi; Cifelli, Richard L.; Kielan-Jaworowska, Zofia (2001). "Dual origin of tribosphenic mammals". Nature. 409 (6816): 53–57. doi:10.1038/35051023. PMID 11343108. S2CID 4342585.