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Haramiyida : ウィキペディア英語版
Haramiyida

Haramiyidans seem to be the earliest known herbivores amongst basal mammals. Their teeth, which are by far the most common remains, resemble those of the multituberculates. The jaw however, based on ''Haramiyavia'', is less derived; and at the level of evolution of earlier basal mammals like ''Morganucodon'' and ''Kuehneotherium'', with a groove for ear ossicles on the dentary.〔Butler PM, 2000〕 They are the longest lived mammalian clade of all time. However, a more recent study, in November 2015, may dispute this and suggested the Haramiyida were not mammals after all, but were part of a more ancestral side branch instead.
==Relationships==

Haramiyids show certain similarities to multituberculates, a group of mammals that survived until about 40 million years ago. So it's possible that haramiyids are ancestral to multituberculates, although the available evidence is insufficient to be conclusive. Certain characteristics of the teeth seem to rule out a special relationship between the two groups,〔Monastersky 1996, p.379〕 although some scientists still unite haramiyids (or at least euharamiyids) and multituberculates in the Allotheria hypothesis.〔Butler & Hooker 2005, p.206〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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