Anisonchanus is an extinct genus of mammals that lived in North America during the Paleocene.

In 1881, Edward Drinker Cope named the species Mioclaenus sectorius for jaws with teeth from the Puerco Formation of New Mexico.

[2] He reassigned it to the new genus Anisonchus later the same year.

[3] That name was preoccupied by the beetle Anisonchus, which was erected by Pierre F.M.A.

[4][a] In 1928, Embrik Strand proposed Anisonchanus as a replacement.