Arsinoitheriidae is a family of belonging to the Extinction order Embrithopoda.
Description
are easily recognized by their prominent nose horns, which, in life, were likely covered in
keratin.
The horns are derived from the
Nasal bone bones.
They are also characterized by pseudolophodont molars.
They also had small incisors, which may have asked as some form of tusk.
Fossil record
Based on the less derived traits of
Namatherium, it is assumed that Arsinoitheriidae underwent a divergent evolution sometime during the
Lutetian.
The latest living genus,
Arsinoitherium, was first recovered from the Latest
Eocene of the
Fayum; it disappears from the fossil record altogether before the end of the
Early Oligocene.
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