Theriiformes

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Theriiformes
Temporal range: Middle Jurassic–Recent
Ptilodus skull.jpg
Skull of the multituberculate Ptilodus (Allotheria)
Maotherium.jpg
Skeleton of Maotherium (Trechnotheria)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Theriimorpha
Clade: Theriiformes
Rowe, 1988
Subgroups

Theriiformes is a clade of mammals. The term was coined by Timothy B. Rowe in his doctoral dissertation, [1] and is defined as the clade formed by the most recent common ancestor of multituberculates (which form part of the broader group Allotheria, along with Gondwanatheria and likely all/part of Haramiyida) and Theria (the group containing marsupials and placental mammals). [2] Mammals more closely related to therians than to multituberculates are included in the clade Trechnotheria. [3] As multituberculates are usually considered more closely related to therians than monotremes are (though some studies have recovered allotherians as less closely related to therians than monotremes are, placing them outside of crown group Mammalia [4] ) it is considered to be a subgroup of the mammalian crown group. [5]

The cladogram below follows Luo et al. (2016): [6]

Mammalia

References

  1. ↑ Rowe, T. (1988). "Definition, diagnosis, and origin of Mammalia". Journal of Vertebrate Paleontology. 8 (3): 241–264. doi:10.1080/02724634.1988.10011708.
  2. ↑ Zachos, Frank; Asher, Robert, eds. (2018-10-22). Mammalian Evolution, Diversity and Systematics. De Gruyter. ISBN   978-3-11-034155-3.
  3. ↑ Macrini, T. E.; Rougier, G. W.; Rowe, T. (2007). "Description of a Cranial Endocast from the Fossil Mammal Vincelestes neuquenianus (Theriiformes) and its Relevance to the Evolution of Endocranial Characters in Therians". The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology. 290 (7): 875–892. doi:10.1002/ar.20551.
  4. ↑ Mao, Fangyuan; Li, Zhiyu; Wang, Zhili; Zhang, Chi; Rich, Thomas; Vickers-Rich, Patricia; Meng, Jin (2024-04-18). "Jurassic shuotheriids show earliest dental diversification of mammaliaforms". Nature. 628 (8008): 569–575. doi:10.1038/s41586-024-07258-7. ISSN   0028-0836.
  5. ↑ Macrini, Thomas E.; Rougier, Guillermo W.; Rowe, Timothy (July 2007). "Description of a Cranial Endocast from the Fossil MammalVincelestes neuquenianus (Theriiformes) and its Relevance to the Evolution of Endocranial Characters in Therians". The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology. 290 (7): 875–892. doi:10.1002/ar.20551.
  6. ↑ Luo, Zhe-Xi; Schultz, Julia A.; Ekdale, Eric G. (2016). "Evolution of the Middle and Inner Ears of Mammaliaforms: The Approach to Mammals". In Clack, Jennifer A.; Fay, Richard R.; Popper, Arthur N. (eds.). Evolution of the Vertebrate Ear. Vol. 59. pp. 139–174. doi:10.1007/978-3-319-46661-3_6.
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