Table 1. Phylogenetic definitions.
| Clade name/author | Definition | Reference |
|---|---|---|
| Neosauropoda Bonaparte (1986) |
The least inclusive clade containing Saltasaurus loricatus and Diplodocus longus | Wilson & Sereno (1998) |
| Diplodocoidea Marsh (1884) |
The most inclusive clade that includes Diplodocus longus but excludes Saltasaurus loricatus | Wilson & Sereno (1998) |
| Diplodocimorpha Calvo & Salgado (1995) |
Diplodocus, Rebbachisaurus, their most recent common ancestor, and all of its descendents | Taylor & Naish (2005) |
| Macronaria Wilson & Sereno (1998) | The most inclusive clade that includes Saltasaurus loricatus but excludes Diplodocus longus | Wilson & Sereno (1998) |
| Titanosauriformes Salgado, Coria & Calvo (1997) |
The least inclusive clade including Brachiosaurus altithorax and Saltasaurus loricatus | Salgado, Coria & Calvo (1997) |
| Brachiosauridae Riggs (1904) | The most inclusive clade that includes Brachiosaurus altithorax but excludes Saltasaurus loricatus | Wilson & Sereno (1998) |
| Somphospondyli Wilson & Sereno (1998) | The most inclusive clade that includes Saltasaurus loricatus but excludes Brachiosaurus altithorax | Wilson & Sereno (1998); Upchurch, Barrett & Dodson (2004) |
| Euhelopodidae Romer (1956) |
The most inclusive clade that includes Euhelopus zdanskyi but excludes Neuquensaurus australis | D’Emic (2012) |
| Titanosauria Bonaparte & Coria (1993) |
The least inclusive clade that includes Andesaurus delgadoi and Saltasaurus loricatus | Wilson & Upchurch (2003) |
| Lithostrotia Wilson & Upchurch (2003) | The least inclusive clade containing Malawisaurus dixeyi and Saltasaurus loricatus | Wilson & Upchurch (2003); Upchurch, Barrett & Dodson (2004) |