†Parareptilia Olson 1947 [deBraga & Reisz 1996] see Subclass Parareptilia Olson, 1947
   †Procolophonidae Lydekker 1889 [Laurin & Reisz 1995] see Family Procolophonidae Lydekker, 1889
     †"horned procolophonids"
       †Procolophoninae Lydekker 1889 [Modesto et al. 2002] see Subfamily Procolophoninae Lydekker, 1889
         Genus †Thelephon Modesto & Damiani, 2003 [monotypic]
           †Thelephon contritus (Gow, 1977)