Crurotarsi
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| Crurotarsans | |
|---|---|
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| Life restoration of Protome batalaria | |
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| Life restoration of Ornithosuchus woodwardi | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauriformes |
| Clade: | Crurotarsi Sereno & Arcucci, 1990 |
| Subgroups | |
The Crurotarsi are one of the two main groups of archosaurs. It includes the archosaurs (living today are crocodiles and birds). It also includes all their ancestors and relatives right back to the early Triassic period, including the Pseudosuchia.
Crurotarsi:
- Avemetatarsalia
- †Pterosauria
- †Dinosauria
- Aves (birds)
- The crocodile line Pseudosuchia
- †Phytosauria: semi-aquatic long-snouted types
- †Aetosauria: quadrupedal armoured herbivores
- †Ornithosuchidae: look rather like dinosaurs
- Crocodylomorpha (Crocodilia and their ancestors)
- †Rauisuchia ? uncertain group, includes some large-bodied quadrupedal predators
Both main groups of Archosaurs are defined by features of their ankle joints.[1][2]
References[change | change source]
- ↑ Sereno P.C. & Arcucci A.B. 1990. The monophyly of crurotarsal archosaurs and the origin of bird and crocodile ankle joints. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 180: 21–52.
- ↑ Nesbitt S.J. 2011. The early evolution of archosaurs: relationships and the origin of major clades. Bulletin of the American Museum of Natural History 352: 1–292. [1]