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Clade
Subclade

Taxon
Taxon
Macronaria
Nominal Author
Wilson and Sereno 1998
2nd Nominal Author
Taxon Status ACTIVE
Comments
First named and defined by Wilson and Sereno (1998) and Sereno (1998), the taxon has not been re-defined in any way since (Upchurch et al. 2004). Both textual variants of the definition are given below, as they were published in the same year. Camarasauromorpha, a node-based group with similar taxonomic content, was named independently by Salgado et al. (1997), who only used node-based definitions. Macronaria, in contrast, is a stem-based definition that is part of a node-stem triplet (for additional discussion, see Taylor and Naisch 2005).  The active definition is a first-order revision that uses species as specifiers.
Potential Synonomy
Camarasauromorpha

Active Phylogenetic Definition
Active Definition
The most inclusive clade containing Saltasaurus loricatus Bonaparte and Powell 1980 but not Diplodocus longus Marsh 1878.
Shorthand
> Saltasaurus loricatus but not Diplodocus longus.
Definitional Author
Sereno 2005
Definition Status checked
Definition Type STEM
Node-Stem Triplet STEM
Other Triplet Taxa
Neosauropoda, Diplodocoidea
Specifiers
Specifier(s) A
Saltasaurus loricatus
Specifier(s) B
Specifier(s) C
Diplodocus longus
Qualifiers
+Taxon
-Taxon
Datum
Taxonomic Content
Publication Year Unknown
Unknown
Unknown
1998

Inactive Taxon Status
Rejection Criteria
Critique
 

Definitional History #1
Earliest Record
Neosauropods more closely related to Saltasaurus than to Diplodocus.
Latest Record
Wilson and Sereno 1998:49
Range (My)
Range (My)
Saltasaurus, Diplodocus
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Definitional History #2
Earliest Record
All neosauropods closer to Saltasaurus than to Diplodocus.
Latest Record
Sereno 1998:63
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Saltasaurus, Diplodocus
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