Leptopleuroninae Explained

Leptopleuroninae is an extinct subfamily of procolophonid reptiles.^[1] 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.^[2]

Phylogeny

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):^[2]

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

Analysis 2: Single MPT.

Notes and References

1. Cisneros . J. C. . Phylogenetic relationships of procolophonid parareptiles with remarks on their geological record . 10.1017/S1477201907002350 . Journal of Systematic Palaeontology . 6 . 3 . 345–366 . 2008 . 84468714 .
2. 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 . 10.1002/ar.25316 . 37735997 . free.
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 . 10.1080/02724631003758003. 2010JVPal..30..715M . 84563475 .