Tanysauria
Tanysauria (meaning "long lizards") is an extinct clade long-necked archosauromorph reptiles from the Triassic period of Europe, Asia, North America, and South America. It comprises the families Tanystropheidae and Trachelosauridae (found by the authors to be coextensive with Dinocephalosauridae, and a senior synonym of the latter). Within the Archosauromorpha, Tanysauria represents the sister group to the Crocopoda.[1] It contains many of the species formerly placed in "Protorosauria", which is now thought to be a paraphyletic group.
| Tanysaurians Temporal range: | |
|---|---|
| Skeletal reconstruction of Tanystropheus hydroides | |
| Skeletal reconstruction of Dinocephalosaurus | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauromorpha |
| Clade: | †Tanysauria Spiekman et al., 2024 |
| Subgroups | |
Classification
In their 2024 redescription of Trachelosaurus, Spiekman and colleagues named Tanysauria as a new clade containing the Tanystropheidae and Trachelosauridae (a senior synonym of Dinocephalosauridae). This clade is the sister taxon to the Crocopoda. The results of their phylogenetic analyses are shown in the cladogram below:<ref name="Tanysauria">
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References
- Spiekman, Stephan N. F.; Ezcurra, Martín D.; Rytel, Adam; Wang, Wei; Mujal, Eudald; Buchwitz, Michael; Schoch, Rainer R. (2024-03-15). "A redescription of Trachelosaurus fischeri from the Buntsandstein (Middle Triassic) of Bernburg, Germany: the first European Dinocephalosaurus-like marine reptile and its systematic implications for long-necked early archosauromorphs". Swiss Journal of Palaeontology. 143 (1): 10. doi:10.1186/s13358-024-00309-6. ISSN 1664-2384.