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Clade
Subclade Archosauria: Crurotarsi to Crocodylia 

Taxon Feedback
Taxon Rauisuchidae 
Nominal Author Huene 1936 
2° Nominal Author Huene 1942 
Taxon Status active
inactive
Comments Most of the suprageneric taxa based on Rauisuchus tiradentes are probably polyphyletic, although decisive hypotheses of relationship have been difficult to establish (Gower 2000). The active definition is the first for Rauisuchidae and is based on the nominotypical genus and species Rauisuchus tiradentes. The definition is stem-based so that it will include taxa that are most closely related to Rauisuchus tiradentes but exclude taxa more closely related to other crurotarsal clades. 
Potential Synonomy Rauisuchia 

Active Phylogenetic Definition Feedback
Active Definition The most inclusive clade containing Rauisuchus tiradentes Huene 1942 but not Aetosaurus ferratus Fraas 1877, Prestosuchus chiniquensis Huene 1942, Poposaurus gracilis Mehl 1915, Crocodylus niloticus (Laurenti 1768). 
Shorthand > Rauisuchus tiradentes but not Aetosaurus ferratus, Prestosuchus chiniquensis, Poposaurus gracilis, Crocodylus niloticus
Definitional Author Sereno 2005 
Definition Status original
textual substitution
first-order revision
second-order revision
Definition Type node
stem
Node-Stem Triplet yes
no
Other Triplet Taxa  
Specifiers
Specifier A Rauisuchus tiradentes 
Specifier(s) B  
Specifier(s) C Aetosaurus ferratus, Prestosuchus chiniquensis, Poposaurus gracilis, Crocodylus niloticus 
Qualifiers
+Taxon  
-Taxon  
Datum  
Taxonomic Content stem (entirely extinct)
crown (extant-bounded)
mixed (extant/extinct-bounded)
Publication Year 2005 

Inactive Taxon Status Feedback
Rejection Criteria junior synonym
historically polyphyletic
incomplete definition
no definition
apomorphy-based
redundant
other 
Critique  
 

Current Age Range Feedback
Earliest Record Carnian (228 Ma) 
Latest Record Carnian (217 Ma) 
Range (My) 11 
Basis for Range The earliest record is Rauisuchus tiradentes from the Carnian-age Sanata Maria Formation of Brazil (Huene 1942). The latest record is tetatively set at the end of the Carnian stage but is expected to be extended when younger taxa are more effecctively tied to the nominotypical species. Dates are rounded to the nearest million, the earliest from the beginning of the stage and the latest from the end of the stage (Gradstein et al. 2004).