Leptopleuroninae

Leptopleuroninae is an extinct subfamily of procolophonid reptiles. The oldest member of Leptopleuroninae is Phonodus dutoitorum from the Induan age of the Early Triassic. It is the only procolophonid group that survived into the Late Triassic.

Phylogeny
A cladogram showing relationships within Procolophonidae after Modesto et al., 2010:

Below are two cladograms that follow phylogenetic analyses by Butler et al. (2023):

Analyses 1 and 3: Strict consensus of 760 and 18 most parsimonious trees (MPTs).

Analysis 2: Single MPT.