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Clade
Subclade

Taxon
Taxon
Phytosauria
Nominal Author
Meyer 1861
2nd Nominal Author
Lydekker 1888
Taxon Status ACTIVE
Comments

Phytosauria and Parasuchia have both been used in the recent literature for this clade, and both initially received a node-based definition from Doyle and Sues (1995) and Sereno (1991), respectively. Here Phytosauria is regarded as having the broader historical use than Parasuchia. Attribution of Phytosauria to Meyer 1861 (rather than its first use in this form (Lydekker 1888) follows Doyle and Sues (1995:546).

The active definition of Phytosauria is a second-order revision, because a stem-based, rather than a node-based, definition ensures incorporation of newly discovered basal taxa. As is always the case, users will determine if this revision is warranted. One anticipates future discoveries of phytosaurs that will help bridge the morphological gap to currently known taxa.

Potential Synonomy
Parasuchia

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Rutiodon carolinensis Emmons 1856 but not Aetosaurus ferratus Fraas 1877, Rauisuchus tiradentes Huene 1942, Prestosuchus chiniquensis Huene 1942, Ornithosuchus woodwardi Newton 1894, Crocodylus niloticus (Laurenti 1768).
Shorthand
> Rutiodon carolinensis but not Aetosaurus ferratus, Rauisuchus tiradentes, Prestosuchus chiniquensis, Ornithosuchus woodwardi, Crocodylus niloticus.
Definitional Author
Sereno 2005
Definition Status checked
Definition Type STEM
Node-Stem Triplet NO
Other Triplet Taxa
Specifiers
Specifier(s) A
Rutiodon carolinensis
Specifier(s) B
Specifier(s) C
Aetosaurus ferratus, Rauisuchus tiradentes, Prestosuchus chiniquensis, Ornithosuchus woodwardi, Crocodylus niloticus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
Paleorhinus, Phytosauridae, and all descendants of their closest common ancestor.
Latest Record
Doyle and Sues 1995:546
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Paleorhinus, Phytosauridae
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