Clade | |
Subclade |
Taxon | |
Taxon |
Sauropoda
|
Nominal Author | Marsh 1878 |
2nd Nominal Author | |
Taxon Status | ACTIVE |
Comments | Sauropoda was initially defined as both a node- and stem-based group by Salgado et al. (1997) and McIntosh (1997), respectively. The node-based definition focuses on the basal sauropod Vulcanodon. The stem-based definition was initially constructed when at least a core group of prosauropods were regarded as monophyletic. With most basal sauropodomorphs redistributed as successive stem taxa, a stem-based definition for Sauropoda must be retooled to exclude the most derived forms. Otherwise Sauropoda will subsume many taxa formerly considered prosauropods (e.g. Yates and Kitching 2003). The active definition is a first-order revision of McIntosh (1997), Wilson and Sereno (1998) and Sereno (1998). Two external specifiers, Mussaurus patagonicus and Jingshanosaurus xinwaensis (Pol and Powell 2005, Zhang and Yang 1994) were used to delimit the taxonomic content of Sauropoda. There is significant evidence that these two well preserved and documented sauropodomorphs are among the closest to Sauropoda. Their postcranial skeletons, however, are remarkably similar to that of other basal sauropodomorphs. |
Potential Synonomy |
Active Phylogenetic Definition | |
Active Definition |
The most inclusive clade containing Saltasaurus loricatus Bonaparte and Powell 1980 but not Jingshanosaurus xinwaensis Zhang and Yang 1994, Mussaurus patagonicus Bonaparte and Vince 1979.
|
Shorthand |
> Saltasaurus loricatus but not Jingshanosaurus xinwaensis, Mussaurus patagonicus. |
Definitional Author |
Sereno 2005 |
Definition Status | checked |
Definition Type | STEM |
Node-Stem Triplet | NO |
Other Triplet Taxa | |
Specifiers | |
Specifier(s) A |
Saltasaurus loricatus |
Specifier(s) B | |
Specifier(s) C |
Jingshanosaurus xinwaensis, Mussaurus patagonicus
|
Qualifiers | |
+Taxon | |
-Taxon | |
Datum | |
Taxonomic Content | |
Publication Year |
Unknown Unknown Unknown 1997 |
Inactive Taxon Status | |
Rejection Criteria | |
Critique | |
Definitional History #1 | |
Earliest Record | The clade including the most recent common ancestor of Vulcanodon karibaensis and Eusauropoda and all of its descendants. |
Latest Record | Salgado et al. 1997:6 |
Range (My) | |
Range (My) |
Vulcanodon karibaensis, Eusauropoda |
Range (My) |
Definitional History #2 | |
Earliest Record | Cetiosaurs, brachiosaurs, diplodocids, titanosaurs, and all sauropodomorphs closer to these than to prosauropods, assuming the latter as a monophyletic group. |
Latest Record | McIntosh 1997:654 |
Range (My) | |
Range (My) |
cetiosaurs, brachiosaurs, diplodocids, titanosaurs, prosauropods |
Range (My) |
Definitional History #3 | |
Earliest Record | All sauropodomorphs closer to Saltasaurus than to Plateosaurus. |
Latest Record | Wilson and Sereno 1998:31 |
Range (My) | |
Range (My) |
Saltasaurus, Plateosaurus |
Range (My) |
Definitional History #4 | |
Earliest Record | All sauropodomorphs closer to Saltasaurus than to Plateosaurus. |
Latest Record | Sereno 1998:63 |
Range (My) | |
Range (My) |
Saltasaurus, Plateosaurus |
Range (My) |
Definitional History #5 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #6 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #7 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #8 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #9 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |
Definitional History #10 | |
Earliest Record | |
Latest Record | |
Range (My) | |
Range (My) | |
Range (My) |