Tribosphenida

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Tribosphenida
Temporal range: Middle Jurassic - Present, 165–0 Ma
Kangaroo and joey03.jpg
Kangaroo with her joey
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Legion: Cladotheria
Sublegion: Zatheria
Infralegion: Tribosphenida
McKenna, 1975
Clades

Tribosphenida is a group (infralegion) of mammals that includes the ancestor of Hypomylos, Necrolestidae, Aegialodontia and Theria (the last common ancestor of marsupials and placentals plus all of its descendants).

Phylogeny[edit]

Below is a cladogram from Rowe (1988) and McKenna and Bell (1997) showing one hypothesis of mammal relationships:[1][2]

Mammaliaformes 

Morganucodontidae


Mammalia 

PrototheriaMonotremata


Theriiformes

Allotheria→†Multituberculata


Holotheria

Kuehneotheria


Trechnotheria

Zhangheotherium †("Symmetrodonta")


 Cladotheria 

Dryolestoidea


 Zatheria 

Peramura


Tribosphenida

Aegialodontia


 Theria 

MetatheriaMarsupialia



EutheriaPlacentalia











References[edit]

  1. ^ Rowe, Timothy (1988). "Definition, diagnosis, and origin of Mammalia". Journal of Vertebrate Paleontology 8 (3): 241–264. doi:10.1080/02724634.1988.10011708. ISSN 0272-4634. 
  2. ^ McKenna, Malcolm C.; Bell, Susan K. (1997). Classification of Mammals Above the Species Level. Columbia University Press. pp. 9–10. ISBN 978-0-231-11012-9. Retrieved 16 March 2015. 

External links[edit]

Further reading[edit]

  • McKenna, Bell: Classification of Mammal: Above the Species Level
  • Teun van Rheede, Trijntje Bastiaans, David N Boone, S Blair Hedges, Wilfried W de Jong, Ole Madsen: The Platypus is in its Place: Nuclear Genes and Indels Confirm the Sister Group Relation of Monotremes and Therians.