Prepoplanops is an extinct genus of ground sloth of the family Megatheriidae.

[1] Prepoplanops was a representative of the Planopsinae, a subfamily of megatheriids that lived during the Miocene.

Prepoplanops boleadorensis was first described in 2013, based on fossil remains found in Argentina's Santa Cruz Province in the Cerro Boleadoras Formation.

[2] Below is a phylogenetic tree of the Megatheriidae, based on the work of Varela and colleagues (2019).

[3] Eremotherium Megatherium Proeremotherium Pyramiodontherium Anisodontherium Diabolotherium Megathericulus Planops Prepotherium Prepoplanops