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

Leptopleuroninae is an extinct subfamily of procolophonid reptiles. It is defined as all taxa closer to Leptopleuron lacertinum than to Procolophon trigoniceps. 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):

References

1. Silva-Neves, E.; Da-Rosa, Á. A. S.; Modesto, S. P.; Dias-da-Silva, S. (2024). "Cornualbus primus gen. et sp. nov.: a new procolophonid (Reptilia: Parareptilia) from Upper Triassic of South America, first tetrapod from the Passo das Tropas Member of the Santa Maria Supersequence". Journal of Systematic Palaeontology. 22 (1). doi:10.1080/14772019.2024.2373116.
2. ^ Cisneros, J. C. (2008). "Phylogenetic relationships of procolophonid parareptiles with remarks on their geological record". Journal of Systematic Palaeontology. 6 (3): 345–366. doi:10.1017/S1477201907002350. S2CID 84468714.
3. ^ Modesto, S.P.; Scott, D.M.; Botha-Brink, J.; Reisz, R.R. (2010). "A new and unusual procolophonid parareptile from the Lower Triassic Katberg Formation of South Africa". Journal of Vertebrate Paleontology. 30 (3): 715–723. Bibcode:2010JVPal..30..715M. doi:10.1080/02724631003758003. S2CID 84563475.
4. ^ Butler, R. J.; Meade, L. E.; Cleary, T. J.; McWhirter, K. T.; Brown, E. E.; Kemp, T. S.; Benito, J.; Fraser, N. C. (2023). "Hwiccewyrm trispiculum gen. et sp. nov., a new leptopleuronine procolophonid from the Late Triassic of southwest England". The Anatomical Record. doi:10.1002/ar.25316. PMID 37735997.

v t e Procolophonia
Kingdom: Animalia Phylum: Chordata Superclass: Tetrapoda Clade: Amniota Class: Sauropsida Sauropsida see Sauropsida Procolophonia see below↓ Procolophonia
Nyctiphruretidae? Abyssomedon Nyctiphruretus Pareiasauromorpha Lanthanosuchidae? Chalcosaurus Lanthaniscus? Lanthanosuchus Nycteroleteridae Bashkyroleter Emeroleter Macroleter Nycteroleter Rhipaeosaurus Pareiasauria Bradysaurus Bunostegos Deltavjatia Embrithosaurus Nochelesaurus Parasaurus Senectosaurus Pumiliopareiasauria Anthodon Nanoparia Provelosaurus Pumiliopareia Therischia Arganaceras Elginia Obirkovia Pareiasaurus Sanchuansaurus Scutosaurus Shihtienfenia Procolophonoidea Owenettidae Barasaurus Candelaria Owenetta Ruhuhuaria Saurodektes Procolophonidae Coartaredens? Coletta Eomurruna Gomphiosauridion? Kinelia? Kitchingnathus Lasasaurus Oryporan Phaanthosaurus Pintosaurus Sauropareion Smilodonterpeton Sphenosaurus Spondylolestes? Suchonosaurus Theledectes Tichvinskia Tricuspisaurus? Xenodiphyodon? Youngetta Leptopleuroninae Basileosaurus? Cornualbus Hwiccewyrm Hypsognathus Koiloskiosaurus Leptopleuron Libognathus Mandaphon Neoprocolophon Pentaedrusaurus Phonodus Sclerosaurus Scoloparia Soturnia Threordatoth Procolophoninae Anomoiodon Burtensia Eumetabolodon Insulophon? Kapes Lestanshoria? Orenburgia Procolina Procolophon Samaria? Teratophon Thelephon Thelerpeton Timanophon

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