Biology:Leptosuchomorpha

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Leptosuchomorpha is a clade of phytosaurs. 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.[1] 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 lithodendrorum, Leptosuchus studeri, and Machaeroprosopus pristinus to reflect the new interrelationships of Phytosauria they recovered.[2]

Phylogeny

Below is a cladogram from Stocker (2012)[1]

Phytosauria

"Paleorhinus" scurriensis

Paleorhinus bransoni

"Paleorhinus" sawini

Phytosauridae

Brachysuchus megalodon

Angistorhinus

Rutiodon carolinensis

"Machaeroprosopus" zunii

Protome batalaria

Leptosuchomorpha

"Phytosaurus" doughtyi

TMM 31173-120

Leptosuchus crosbiensis

Leptosuchus studeri

Smilosuchus lithodendrorum

Smilosuchus adamanensis

Smilosuchus gregorii

Pravusuchus hortus

Pseudopalatinae

Pseudopalatus mccauleyi

Mystriosuchus westphali

Pseudopalatus pristinus

References

  1. 1.0 1.1 Stocker, M. R. (2012). "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". Journal of Vertebrate Paleontology 32 (3): 573–586. doi:10.1080/02724634.2012.649815. 
  2. Jones, Andrew S.; Butler, Richard J. (10 December 2018). "A new phylogenetic analysis of Phytosauria (Archosauria: Pseudosuchia) with the application of continuous and geometric morphometric character coding". PeerJ 6. doi:10.7717/peerj.5901. PMID 30581656. 

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