Leptosuchomorpha

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]

Leptosuchomorpha Temporal range: Late Triassic 237–201.4 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Skull of Smilosuchus gregorii in the American Museum of Natural History
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauromorpha
Clade:	Archosauriformes
Order:	†Phytosauria
Family:	†Parasuchidae
Subfamily:	†Mystriosuchinae
Clade:	†Leptosuchomorpha Stocker, 2010
Subgroups
†Leptosuchus †Pravusuchus †Smilosuchus †Mystriosuchini

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