Euharamiyida

Euharamiyida
Temporal range: Middle Jurassic–Early Cretaceous
Life restoration of Shenshou
Skull of Xianshou
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Clade: Cynodontia
Clade: Mammaliaformes
Order: Haramiyida
Clade: Euharamiyida
Bi et al. 2014

Euharamiyida also known as Eleutherodontida, is clade of early mammals or mammal-like cynodonts from the Middle Jurassic to Early Cretaceous of Eurasia and possibly North America. The group is sometimes considered a sister group to Multituberculata, or part of an earlier divergence within the synapsid line. It is disputed whether or not they are related to the Haramiyids from the Late Triassic, such as Haramiyavia. The morphology of their teeth indicates that they were herbivorous or omnivorous. Some members of the group are known to be arboreal, including gliding forms similar to modern flying squirrels or colugos.

Evolution

The position of euharamyidans is contested. They are either considered crown group mammals as members of Allotheria, related to multituberculates, or they are considered to stem-group mammals within the Mammaliaformes. The position is often dependent on the relationships of euharamiyids to the Late Triassic haramiyids such as Haramiyavia and Thomasia. In some studies, the two groups are recovered as unrelated.

Phylogeny

Huttenlocker et al. 2018 Mao et al. 2022
Euharamiyida (=Eleutherodontida)

Megaconus

Cifelliodon

Hahnodon

Gondwanatheria

Vintana

Eleutherodontidae

Maiopatagium

Shenshou

Millsodon

Eleutherodon

Sineleutherus

Xianshou

Arboroharamiya

Vilevolodon

Euharamiyida

Maiopatagium furculiferum

Maiopatagium sibiricum

Cryoharamiya

Sharypovia

Shenshouidae

Qishou

Shenshou

Allostaffia

Sineleutherus

Butlerodon

Woodeatonia

Kermackodontidae

Kermackodon

Arboroharamiyidae

Xianshou

Arboroharamiya allinhopsoni

Arboroharamiya jenkinsi

Vilevolodon

Taxa

The following taxonomy follows Mao et al. (2022) unless otherwise cited.


This page was last updated at 2023-11-26 02:06 UTC. Update now. View original page.

All our content comes from Wikipedia and under the Creative Commons Attribution-ShareAlike License.


Top

If mathematical, chemical, physical and other formulas are not displayed correctly on this page, please useFirefox or Safari