Rauisuchidae is a group of large (up to [1]) predatory Triassic archosaurs. Some disagreement exists over which genera should be included in the Rauisuchidae and which should be in the related Prestosuchidae and Poposauridae, and indeed whether these should even be thought of as separate valid families. Rauisuchids occurred throughout much of the Triassic, and may have first occurred in the Early Triassic if some archosaurian taxa such as Scythosuchus and Tsylmosuchus are considered to be within the family.[2]
An early cladistic analysis of crocodylotarsan (pseudosuchian) archosaurs included Lotosaurus, Fasolasuchus, Rauisuchus, and "the Kupferzell rauisuchid" (later called Batrachotomus) within the Rauisuchidae.[3] However, a later study found that Batrachotomus was a more basal pseudosuchian only slightly more "advanced" than Prestosuchus.[4] In addition, the toothless Lotosaurus has been found to be more closely related to the Ctenosauriscidae, a clade of poposauroids with sails on their backs.[5]
Two genera, previously classified as poposaurids, are in fact rauisuchids. These include Teratosaurus[6] [7] and Postosuchus.[8]
| Genus | Status | Age | Location | Unit | Notes | Images |
|---|---|---|---|---|---|---|
| Arganasuchus? | Valid | Late Triassic |  Morocco | Named for the Moroccan fossil site where it was discovered, the Argana Basin. Its phylogenetic placement is uncertain. | ||
| Fenhosuchus? | Valid | Anisian |  China | May be a chimera of fossils from the erythrosuchid Shansisuchus and an indeterminate archosaur. | ||
| Jushatyria? | Valid | Ladinian | Placement uncertain | |||
| Polonosuchus | Valid | Carnian |  Poland | |||
| Postosuchus | Valid | Late Triassic |  United States | Chinle Formation Newark Supergroup | One of the most well-known genera of Rauisuchidae | |
| Procerosuchus? | Valid | Carnian |  Brazil | Santa Maria Formation | Placement uncertain | |
| Rauisuchus | Valid | Late Triassic | Brazil | |||
| Scolotosuchus | Valid | Olenekian | Lipovskaya Formation | |||
| Teratosaurus | Valid | Norian - Rhaetian |  Germany | Löwenstein Formation | Once considered an early carnosaurian dinosaur | |
| Tikisuchus? | Valid | Late Triassic |  India | Tiki Formation | Placement uncertain | |
| Vivaron | Valid | Norian | United States | Chinle Formation | ||
| Vjushkovisaurus? | Valid | Anisian | May be an erythrosuchid | |||
| Vytshegdosuchus? | Valid | Olenekian | Placement uncertain | |||