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Clade
Subclade Archosauria: Avemetatarsalia to Neornithes 
Taxon Feedback
Taxon Euhelopodidae 
Nominal Author Romer 1956 
2° Nominal Author Kuhn 1965 
Taxon Status active
inactive
Comments  
Potential Synonomy  
Active Phylogenetic Definition Feedback
Active Definition  
Shorthand  
Definitional Author  
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  
Specifier(s) B  
Specifier(s) C  
Qualifiers
+Taxon  
-Taxon  
Datum  
Taxonomic Content stem (entirely extinct)
crown (extant-bounded)
mixed (extant/extinct-bounded)
Publication Year  
Inactive Taxon Status Feedback
Rejection Criteria junior synonym
historically polyphyletic
incomplete definition
no definition
apomorphy-based
redundant
other 
Critique Romer (1956:621) coined the subfamily for an assemblage of genera including Euhelopus, Omeisaurus, Tienshanosaurus and the dubious tooth-form Chiayüsaurus. Upchurch (1995:373) coined the family to include a group of Chinese sauropods (Euhelopus, Shunosaurus, Omeisaurus and Mamenchisaurus) that are now believed to be phylogenetically disparate (Wilson and Sereno 1998). Upchurch et al. (2004), in a new cladistic analysis, corroborated the hypothesis of Wilson and Sereno (1998), disbanding Upchurch’s (1995) clade of Chinese sauropods. 
 
Current Age Range Feedback
Earliest Record  
Latest Record  
Range (My)  
Basis for Range  
Additional Definitional History: None Available