Leptosuchomorpha

{{Short description|Extinct clade of reptiles}} {{Automatic taxobox | fossil_range = [[Late Triassic]] {{fossil range|237|201.4}} | image = Leptosuchus gregorii skull.jpg | image_upright = 1.15 | image_caption = Skull of ''[[Smilosuchus gregorii]]'' in the [[American Museum of Natural History]] | taxon = Leptosuchomorpha | authority = Stocker, [[2010 in paleontology|2010]] | subdivision_ranks = Subgroups | subdivision = * {{extinct}}''[[Leptosuchus]]'' * {{extinct}}''[[Pravusuchus]]'' * {{extinct}}''[[Smilosuchus]]'' * {{extinct}}[[Mystriosuchini]] }}

'''Leptosuchomorpha''' is a [[clade]] of [[phytosaur]]s. It is a [[node-based taxon]] defined by Michelle R. Stocker in 2010 as the last common ancestor of ''[[Leptosuchus studeri]]'' and ''[[Pseudopalatus pristinus]]'' and all of its descendants.<ref name=SMR12>{{Cite journal | last1 = Stocker | first1 = M. R. | title = A new phytosaur (Archosauriformes, Phytosauria) from the Lot's Wife beds (Sonsela Member) within the Chinle Formation (Upper Triassic) of Petrified Forest National Park, Arizona | doi = 10.1080/02724634.2012.649815 | journal = Journal of Vertebrate Paleontology | volume = 32 | issue = 3 | pages = 573–586 | year = 2012 | s2cid = 129527672 }}</ref> A new definition was proposed by Andrew S. Jones and Richard J. Butler in 2018 as the last common ancestor and all descendants of ''[[Smilosuchus|Smilosuchus lithodendrorum]]'', ''[[Leptosuchus|Leptosuchus studeri]]'', and ''[[Machaeroprosopus|Machaeroprosopus pristinus]]'' to reflect the new interrelationships of Phytosauria they recovered.<ref>{{cite journal |last1=Jones |first1=Andrew S. |last2=Butler |first2=Richard J. |title=A new phylogenetic analysis of Phytosauria (Archosauria: Pseudosuchia) with the application of continuous and geometric morphometric character coding |journal=PeerJ |date=10 December 2018 |volume=6 |article-number=e5901 |doi=10.7717/peerj.5901|pmid=30581656 |pmc=6292387 |doi-access=free }}</ref>

==Phylogeny== Below is a [[cladogram]] from Stocker (2012)<ref name=SMR12/> {{clade| style=font-size:100%;line-height:85% |label1=[[Phytosauria]] |1={{clade |1=''[[Paleorhinus|"Paleorhinus" scurriensis]]'' |2={{clade |1=''[[Paleorhinus bransoni]]'' |2={{clade |1=''[[Paleorhinus|"Paleorhinus" sawini]]'' |label2=[[Phytosauridae]] |2={{clade |1=''[[Brachysuchus megalodon]]'' |2=''[[Angistorhinus]]'' |3={{clade |1=''[[Rutiodon carolinensis]]'' |2=''[[Rutiodon|"Machaeroprosopus" zunii]]'' |3=''[[Protome batalaria]]'' |label4='''Leptosuchomorpha''' |4={{clade |1=''[[Phytosaurus|"Phytosaurus" doughtyi]]'' |2=TMM 31173-120 |3={{clade |1=''[[Leptosuchus crosbiensis]]'' |2=''[[Leptosuchus studeri]]''}} |4={{clade |1={{clade |1=''[[Smilosuchus lithodendrorum]]'' |2={{clade |1=''[[Smilosuchus adamanensis]]'' |2=''[[Smilosuchus gregorii]]''}} }} |2={{clade |1=''[[Pravusuchus hortus]]'' |label2=[[Pseudopalatinae]] |2={{clade |1=''[[Pseudopalatus mccauleyi]]'' |2={{clade |1=''[[Mystriosuchus westphali]]'' |2=''[[Pseudopalatus pristinus]]'' }} }} }} }} }} }} }} }} }} }} }}

==References== {{Reflist}} {{Portal|Paleontology}}

[[Category:Phytosauria]] [[Category:Late Triassic reptiles of Europe]] [[Category:Late Triassic reptiles of North America]] [[Category:Late Triassic first appearances]] [[Category:Late Triassic extinctions]] [[Category:Taxa named by Michelle R. Stocker]]