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Late Triassic dinosaur clade From Wikipedia, the free encyclopedia
Saturnaliidae is a family of basal sauropodomorph dinosaurs found in Brazil, Argentina and possibly Zimbabwe.[1] It is not to be confused with Saturnalidae, a family of radiolarian protists.[2]
| Saturnaliids Temporal range: Late Triassic, | |
|---|---|
| |
| Life restoration of Saturnalia tupiniquim | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Family: | †Saturnaliidae Langer et al., 2019 |
| Type species | |
| †Saturnalia tupiniquim Langer et al., 1999 | |
| Genera | |
| Synonyms | |
| |
In 2010, Martin Ezcurra defined the subfamily Saturnaliinae for the clade containing Saturnalia and Chromogisaurus, which were found to be close relatives in several studies.[1] While they are sometimes found to be a subgroup within the Guaibasauridae,[1] all recent studies have found the saturnaliines to form an independent lineage at the very base of the sauropodomorph family tree.[3][4][5][6][7][8][9] At one point, Agnosphitys was recovered as a possible saturnaliine until it was recovered as a member of Silesauridae in 2017.[10] Langer and colleagues (2019) recovered Pampadromaeus and Panphagia as relatives of Saturnalia and Chromogisaurus, elevating Saturnaliinae to family rank as Saturnaliidae. In that particular paper, they recovered Guaibasaurus as a basal theropod.[11]
Additionally, Eoraptor, Buriolestes, Bagualosaurus and especially Nhandumirim are also possible members of this clade following their position in many recent phylogenetic analyses[4][5][6][7][8][9] and the new definition given by Langer et al. (2019), as "the maximal sauropodomorph clade to encompass Saturnalia but not Plateosaurus."[11] In several of these analyses, Guaibasaurus is recovered as distantly related to Saturnalia, sometimes as a more basal sauropodomorph or saurischian, and in some cases specifically related to more derived taxa such as Macrocollum and Unaysaurus. This way a Guaibasauridae including Saturnalia and kin is no longer being supported.
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