Commentary Inf XXVIII 65

This bloodied figure, thus sliced by the sword-wielding devil, will be revealed as Pier da Medicina at v. 73. For the reminiscence of Virgil's description of the disfigured visage of Deiphobus (Aen. VI.494-497), similarly deprived of his nose, see DDP Scartazzini.Inf.XXVIII.64 (and many later commentators).