Acratophorus is an extinct genus of dicynodont that lived during the Anisian age of the Middle Triassic-aged Río Seco de la Quebrada Formation in what is now Argentina.

[1] The type species, A. argentinensis, was originally placed in the genus Kannemeyeria by Jose Bonaparte in 1966,[2][3] and later sometimes referred to Vinceria,[4] before being transferred to a new, distinct genus, Acratophorus, in 2021 by Christian Kammerer and Angi Ordoñez.

[5] The species Vinceria vieja was also made a synonym of A. argentinensis in 2021.

[6] The holotype is PVL 3645, a partial skeleton discovered near a farm house in Puesto Viejo.

[1][5]