Amphionthophagus is a subgenus of scarab beetles in the genus Onthophagus of the family Scarabaeidae. There are at least three described species in Amphionthophagus. They are found in the Palearctic.

Species

These three species belong to the subgenus Amphionthophagus:
* Onthophagus falzonii Goidanich, 1926
* Onthophagus melitaeus

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