Euharamiyida

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Euharamiyida Temporal range: Middle Jurassic–Early Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
Skeleton of Maiopatagium a gliding squirrel-like euharamiyidan from the Middle Jurassic of China
Skull of Xianshou
Scientific classification Edit this 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,^[1] or part of an earlier divergence within the synapsid line.^{[2] [3]} It is disputed whether or not they are related to the haramiyids from the Late Triassic, such as Haramiyavia .^[4] 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.^{[1] [5]}

The position of euharamyidans is contested. They are either considered crown group mammals as members of Allotheria, related to multituberculates, or stem-group mammals within Mammaliaformes.^{[1] [3]} 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.^{[6] [4]}

Huttenlocker et al. 2018[7]	Mao et al. 2022[8]
Euharamiyida (=Eleutherodontida) Megaconus Cifelliodon Hahnodon Gondwanatheria Vintana
Eleutherodontidae	Maiopatagium Shenshou Millsodon Eleutherodon Sineleutherus
Xianshou Arboroharamiya Vilevolodon