Clade | |
Subclade |
Taxon | |
Taxon |
Crocodylomorpha
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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.
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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
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