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Clade
Subclade

Taxon
Taxon
Crocodylomorpha
Nominal Author
Hay 1930
2nd Nominal Author
Taxon Status ACTIVE
Comments

Walker (1968) was first to use the taxon Crocodylomorpha, which is here considered a spelling variant of Hay’s (1930) taxon Crocodylomorphi. Many references in the literature cite Wlaker (1970) as the origin of this taxon name. The name was first used explcitly as a clade by Clark (in Benton and Clark 1988; sensu Walker 1968). Despite its widespread use, the taxon seems never to have been defined.

The active definition is stem-based so that Crocodylomorpha includes all taxa closer to extant crocodilians than to any other recognized suchian subclade. A number of external specifiers are included to ensure stability of taxonomic content in the face of shifting relationships immediately outside the clade. A potential synonmym is Crocodylia in its traditional sense (e.g. Steel 1973), although Crocodylia has never been given a phylogenetic definition with this content.

Potential Synonomy
Crocodylomorphi (Hay 1930, precursor), Crocodylia

Active Phylogenetic Definition
Active Definition
The most inclusive clade containng Crocodylus niloticus (Laurenti 1768) but not Poposarus gracilis Mehl 1915, Gracilisuchus stipanicicorum Romer 1972, Prestosuchus chiniquensis Huene 1942, Aetosaurus ferratus Fraas 1877.
Shorthand
> Crocodylus niloticus but not Poposarus gracilis, Gracilisuchus stipanicicorum, Prestosuchus chiniquensis, Aetosaurus ferratus.
Definitional Author
Sereno 2005
Definition Status ORIGINAL
Definition Type STEM
Node-Stem Triplet STEM
Other Triplet Taxa
Paracrocdylomorpha, Poposauridae
Specifiers
Specifier(s) A
Crocodylus niloticus
Specifier(s) B
Specifier(s) C
Poposarus gracilis, Gracilisuchus stipanicicorum, Prestosuchus chiniquensis, Aetosaurus ferratus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
Critique
 

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