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Clade
Subclade Archosauria: Avemetatarsalia to Neornithes 
Taxon Feedback
Taxon Titanosauriformes 
Nominal Author Salgado et al. 1997 
2° Nominal Author  
Taxon Status active
inactive
Comments First coined and defined as a node-based taxon by Salgado et al. (1997), Titanosauriformes has had similar definitions by subsequent authors. Using only two well known, nested species (Saltasaurus loricatus, Brachiosaurus brancai) creates the least ambiguous definition. 
Potential Synonomy  
Active Phylogenetic Definition Feedback
Active Definition The least inclusive clade containing Brachiosaurus brancai Janensch 1914 and Saltasaurus loricatus Bonaparte and Powell 1980. 
Shorthand < Brachiosaurus brancai and Saltasaurus loricatus. 
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 Brachiosauridae, Somphospondyli 
Specifiers
Specifier A Brachiosaurus brancai 
Specifier(s) B Saltasaurus loricatus 
Specifier(s) C  
Qualifiers
+Taxon  
-Taxon  
Datum  
Taxonomic Content stem (entirely extinct)
crown (extant-bounded)
mixed (extant/extinct-bounded)
Publication Year 1997 
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 Bathonian (168 Ma) 
Latest Record Maastrichtian (66 Ma) 
Range (My) 102 
Basis for Range If “Bothriospondylus” madagascarensis belongs within Brachiosauridae, the earliest record is Bathonian. The latest record of titanosaurans is Maastrichtian from South America and elsewhere. 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 The most recent common ancestor of Brachiosaurus brancai, Chubutisaurus insignis, Titanosauria, and all of its descendants. 
Author Salgado et al. 1997:12 
Type node  stem 
Specifiers Brachiosaurus brancai, Chubutisaurus insignis, Titanosauria 
Qualifiers  
Definitional History #2
Definition 2 Brachiosaurus, Saltasaurus, their common ancestor, and all descendants, including by this definition Brachiosauridae and Somphospondylidae. 
Author Wilson and Sereno 1998:51 
Type node  stem 
Specifiers Brachiosaurus, Saltasaurus 
Qualifiers  
Definitional History #3
Definition 3 Brachiosaurus, Saltasaurus, their most recent common ancestor and all descendants. 
Author Sereno 1998:63 
Type node  stem 
Specifiers Brachiosaurus, Saltasaurus 
Qualifiers