Hyotheridium is a possible Eutherian from the Late Cretaceous (?late Santonian–early Campanian) Djadochta Formation of Mongolia. It also could be a Deltatheriid, although the fossil, a poorly preserved skull with the upper and lower jaws connected in a way that makes them hard to separate and to examine, makes it difficult to determine what it is.[1]

References

  1. ^ "MESOZOIC MAMMALS; Basal Eutheria Two, an internet directory". Archived from the original on 2011-06-07. Retrieved 2008-05-04.


Allikas: https://en.wikipedia.org/wiki/Hyotheridium
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