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Clade
Subclade Archosauria: Crurotarsi to Crocodylia 

Taxon Feedback
Taxon Desmatosuchinae 
Nominal Author Case 1920 
2° Nominal Author Huene 1936 
Taxon Status active
inactive
Comments The active definition is a first-order revision of the intial definition (Heckert and Lucas 2000) that uses species as specifiers. It is stem-based and linked with Stagonolepididae and Stagonolepidinae as a node-stem triplet. 
Potential Synonomy  

Active Phylogenetic Definition Feedback
Active Definition The most inclusive clade containing Desmatosuchus haplocerus (Cope 1892) but not Stagonolepis robertsoni Agassiz 1844. 
Shorthand > Desmatosuchus haplocerus but not Stagonolepis robertsoni
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 Stagonolepididae, Stagonolepidinae 
Specifiers
Specifier A Desmatosuchus haplocerus 
Specifier(s) B  
Specifier(s) C Stagonolepis robertsoni 
Qualifiers
+Taxon  
-Taxon  
Datum  
Taxonomic Content stem (entirely extinct)
crown (extant-bounded)
mixed (extant/extinct-bounded)
Publication Year 2000 

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 Raetian (200 Ma) 
Range (My) 28 
Basis for Range The earliest records is Longosuchus meadei from the Carnian-age Chinle Formation of western North America (Heckert and Lucas 2000). The latest record is Redondosaurus reseri from the Raetian-age Redonda Formation in New Mexico. 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). 

Definitional History #1
Definition 1 All aetosaurs more closely related to Desmatosuchus than the last common ancestor of Stagonolepis and Desmatosuchus
Author Heckert and Lucas 2000:1555 
Type node  stem 
Specifiers Stagonolepis, Desmatosuchus 
Qualifiers