Table 1. Definitions of clade names, ordered systematically.
| Taxon name | Definition | Taxon definition |
|---|---|---|
| Eusuchia (Huxley, 1875) | The last common ancestor of Hylaeochampsa vectiana, Alligator mississippiensis, Crocodylus niloticus, Gavialis gangeticus and all of its descendants. | Brochu (1999a) |
| Hylaeochampsidae (Andrews, 1913) | The last common ancestor of Hylaeochampsa vectiana, Iharkutosuchus makadii, Pachycheilosuchus trinquei and Pietraroiasuchus ormezzanoi and all of its descendants. | Buscalioni et al. (2011) |
| Allodaposuchidae (Narváez et al., 2015) | Allodaposuchus precedens and all crocodyliforms more closely related to it than to Hylaeochampsa vectiana, Shamosuchus djadochtaensis, Borealosuchus sternbergii, Planocrania datangensis, Alligator mississippiensis, Crocodylus niloticus, or Gavialis gangeticus. | Narváez et al. (2015) |
| Crocodylia (Gmelin, 1789) | The last common ancestor of Alligator mississippiensis, Crocodylus niloticus and Gavialis gangeticus, and all of its descendants. | Benton & Clark (1988) |
| Alligatoroidea (Gray, 1844) | Alligator mississippiensis and all crocodylians more closely related to it than to Crocodylus niloticus and Gavialis gangeticus | Norell, Clark & Hutchison (1994) |
| Diplocynodontinae (Brochu, 1999a) | Diplocynodon ratelii and all crocodylians more closely related to it than to Alligator mississippiensis | Brochu (1999a) |
| Globidonta (Brochu, 1999a) | Alligator mississippiensis and all crocodylians more closely related to it than to Diplocynodon ratelii | Brochu (1999a) |
| Alligatoridae (Cuvier, 1807) | The last common ancestor of Alligator mississippiensis and Caiman crocodilus and all of its descendants | Norell, Clark & Hutchison (1994) |
| Alligatorinae (Kälin, 1939) | Alligator mississippiensis and all crocodylians more closely related to it than to Caiman crocodilus | Brochu (1999a) |
| Caimaninae (Norell, 1988) | Caiman crocodilus and all crocodylians more closely related to it than to Alligator mississippiensis | Brochu (1999a) |
| Jacarea (Norell, 1988) | The last common ancestor of Caiman latirostris, Caiman crocodilus, Caiman yacare, Melanosuchus niger, and all its descendants | Brochu (1999a) |
| Planocraniidae (Li, 1976) | The last common ancestor of Planocrania hengdongensis, Planocrania datangensis, Boverisuchus vorax, Boverisuchus magnifrons, and all of its descendants | Brochu (2012) |
| Longirostres (Cuvier, 1807) | The last common ancestor of Crocodylus niloticus, Gavialis gangeticus, and all of its descendants | Harshman et al. (2003) |
| Crocodyloidea (Fitzinger, 1826) | Crocodylus niloticus, and all crocodylians more closely related to it than to Alligator mississippiensis or Gavialis gangeticus | Norell, Clark & Hutchison (1994) |
| Crocodylidae (Cuvier, 1807) | The last common ancestor of Crocodylus niloticus, Osteolaemus tetraspis and all of its descendants | Norell, Clark & Hutchison (1994); Brochu (2003) |
| Osteolaeminae (Brochu, 2003) | Osteolaemus tetraspis and all crocodylians more closely related to it than to Crocodylus niloticus | Brochu (2003) |
| Crocodylinae (Cuvier, 1807) | Crocodylus niloticus, and all crocodylians more closely related to it than to Osteolaemus tetraspis | Brochu (1999a) |
| Mekosuchinae (Balouet & Buffetaut, 1987) | The last common ancestor of Kambara implexidens and Mekosuchus inexpectatus, and all of its descendants | Salisbury & Willis (1996) and Brochu (2003) |
| Gavialoidea (Hay, 1930) | Gavialis gangeticus, and all crocodylians more closely related to it than to Alligator mississippiensis and Crocodylus niloticus | Norell, Clark & Hutchison (1994) |
| Gavialidae (Hay, 1930) | The last common ancestor of Gavialis gangeticus, Tomistoma schlegelii, and all of its descendants | Norell, Clark & Hutchison (1994) |
| Tomistominae (Kälin, 1955) | Tomistoma schlegelii and all crocodylians more closely related to it than to Gavialis gangeticus | Brochu (2003) |
| Gavialinae (Nopcsa, 1923) | Gavialis gangeticus and all crocodylians more closely related to it than to Tomistoma schlegelii | Brochu (2003) |
| Gryposuchinae (Vélez-Juarbe, Brochu & Santos, 2007) |
Gryposuchus jessei and all crocodylians more closely related to it than to Gavialis gangeticus and Tomistoma schlegelii. | Vélez-Juarbe, Brochu & Santos (2007) |
| Brevirostres (Zittel, 1890) | The last common ancestor of Alligatoroidea and Crocodyloidea and all of its descendants | Brochu (1999a) |