What is "amblypoda"

Amblypoda \Am*blyp"o*da\, n. pl. [NL., fr. Gr. ? blunt + ?, ?, foot.] (Paleon.) A group of large, extinct, herbivorous mammals, common in the Tertiary formation of the United States. [1913 Webster] ||

Amblypoda is a taxonomic hypothesis uniting a group of extinct, herbivorous mammals. They were considered a suborder of the primitive ungulate mammals and have since been shown to represent a polyphyletic group.