Leptopleuroninae

Leptopleuroninae Temporal range: Early — Late Triassic
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Family:	†Procolophonidae
Subfamily:	†Leptopleuroninae Ivakhnenko, 1979
Genera
†Basileosaurus? †Cornualbus1 †Hwiccewyrm †Hypsognathus †Koiloskiosaurus †Leptopleuron †Libognathus †Mandaphon †Neoprocolophon †Pentaedrusaurus †Phonodus †Sclerosaurus †Scoloparia †Soturnia †Threordatoth

Leptopleuroninae is an extinct subfamily of procolophonid reptiles.² It is defined as all taxa closer to Leptopleuron lacertinum than to Procolophon trigoniceps.² The oldest member of Leptopleuroninae is Phonodus dutoitorum from the Induan age of the Early Triassic.³ It is the only procolophonid group that survived into the Late Triassic.⁴

A cladogram showing relationships within Procolophonidae after Modesto et al., 2010:³

Below are two cladograms that follow phylogenetic analyses by Butler et al. (2023):⁴