|Upper Permian to this day|
|260.5 to 0 million years|
|von Huene , 1946|
The Archosauromorpha are a family group of the diapsid reptiles , to which the archosaurs and various extinct reptile groups belong, which are more closely related to the archosaurs than to the lepidosaurs . The corresponding sister group of the Archosauromorpha are the Lepidosauromorpha .
The diagnostic features of the early ("primitive") representatives of the group include thecodonten teeth (teeth in tooth sockets ), the absence of a sternum , a joint between the talus (astragalus) and heel bone (calcaneus) within the tarsus and a hook-shaped fifth metatarsal bone , which is connected to the fourth metatarsal bone, as well as the phalangeal formula 2-3-4-5-4 (number of phalanges of the respective toe). Her neck had seven to eight vertebrae .
All Archosauromorpha groups that do not belong to the Archosauria taxon died out during or at the end of the Triassic , with the exception of the Choristodera . The Choristodera survived until the end of the Eocene . The only archosauromorphs living today belong to the Archosauria groups of crocodiles and birds .
- ? † Choristodera Cope, 1884
- † Protorosauria
- † Trilophosauria
- † Rhynchosauria
- Archosauriformes Gauthier, 1986
- Robert L. Carroll: Paleontology and Evolution of the Vertebrates . Thieme, Stuttgart (1993), ISBN 3-13-774401-6
- Martin Sander: Reptiles . Enke, Stuttgart (1994), ISBN 3-432-26021-0