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Clade
Subclade

Taxon
Taxon
Poposauridae
Nominal Author
Nopcsa 1923
2nd Nominal Author
Taxon Status ACTIVE
Comments

Poposauridae was coined by Nopcsa (1923) and initially thought by most to reside within Saurischia and possibly Theropoda. Steel (1970), for example, placed Poposauridae and its sole species Poposaurus gracilis in Carnosaria within Theropoda. Better specimens soon after linked Poposaurus and closest kin with crurotarsal archosaurs. Recent description and discovery of much more complete remains pertaining to Sillosuchus (Alcober and Parrish 1997) and Shuvosaurus (Nesbitt et al. 2005) will impact greatly on the understanding and placement of this clade within Suchia.

Parrish (1993:302) included four genera but did not define Poposuridae. The active definition is stem-based and uses the nominotypical Poposaurus gracilis as an internal specifier. Poposauridae, Paracrocodylomorpha and Crocodylomorpha form a conditional node-stem triplet.

Potential Synonomy

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Poposaurus gracilis Mehl 1915 but not Crocodylus niloticus (Laurenti 1768).
Shorthand
> Poposaurus gracilis but not Crocodylus niloticus.
Definitional Author
Sereno 2005
Definition Status ORIGINAL
Definition Type STEM
Node-Stem Triplet STEM
Other Triplet Taxa
Paracrocodylomorpha, Crocodylomorpha
Specifiers
Specifier(s) A
Poposaurus gracilis
Specifier(s) B
Specifier(s) C
Crocodylus niloticus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
2005

Inactive Taxon Status
Rejection Criteria
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