Euharamiyida
| Euharamiyida Temporal range: Late Triassic to Jurassic | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia/Mammaliaformes |
| Subclass: | ?Theriiformes |
| Infraclass: | †?Allotheria |
| (unranked): | †Haramiyida |
| Order: | †Euharamiyida Bi, Wang, Guan, Sheng, & Meng, 2014 |
Euharamiyids were a clade of early mammals or mammal-like cynodonts from the Jurassic Period in China. The group is sometimes considered a sister group to Multituberculata,[1] or part of an earlier divergence within the synapsid line.[2][3]
Evolution
By studying Euharamiyida, Bi et al. (2014) came to the conclusion that mammals evolved during the late Triassic, with allotherians diverging into Euharamiyids and Multituberculates around 208 million years ago from a common Haramiyavia-like ancestor.[1] However, more recent studies showcase that euharamiyidans are more basal Mammaliaformes, outside of crown-group Mammalia, rendering Allotheria obsolete.[2][3]
Taxa
| Euharamiyida | |||||||||||||||||||||||||||||||||
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| Cladogram of Euharamiyida |
- Arboroharamiya Zheng et al., 2013
- Arboroharamiya jenkinsi Zheng et al., 2013
- Eleutherodon Kermack et al. 1998[4]
- Eleutherodon oxfordensis Kermack et al. 1998
- Shenshou Bi, Wang, Guan, Sheng and Meng, 2014
- Sineleutherus Martin, Averianov & Pfretzschner, 2010
- Sineleutherus issedonicus Averianov, Lopatin & Krasnolutskii, 2011
- Sineleutherus uyguricus Martin, Averianov & Pfretzschner, 2010
- Xianshou Wang, Meng, Bi, Guan and Sheng, 2014
- Xianshou linglong Wang, Meng, Bi, Guan and Sheng, 2014
- Xianshou songae Meng, Guan, Wang, Bi and Sheng, 2014
References
- 1 2 Bi, Shundong; Wang, Yuanqing; Sheng, Xia; Meng, Jin (10 September 2014). "Three new Jurassic euharamiyidan species reinforce early divergence of mammals". Nature. Nature Publishing Group. doi:10.1038/nature13718. Retrieved 11 September 2014. (subscription required (help)).
- 1 2 Chang, Kenneth (16 November 2015). "Jawbone in Rock May Clear Up a Mammal Family Mystery". New York Times. Retrieved 17 November 2015.
- 1 2 Luo, Zhe-Xi; Gates, Stephen M.; Jenkins Jr., Farish A.; Amaral, William W.; Shubin, Neil H. (16 November 2015). "Mandibular and dental characteristics of Late Triassic mammaliaform Haramiyavia and their ramifications for basal mammal evolution". PNAS. doi:10.1073/pnas.1519387112. Retrieved 17 November 2015.
- ↑ "†Eleutherodon Kermack et al. 1998 (mammal)". Fossilworks. Retrieved 11 September 2014.
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