Trachelosaurus

Extinct genus of archosauromorph reptiles

Trachelosaurus is an extinct genus of lizard-like early archosauromorph reptiles in the family Trachelosauridae. It was originally described as a dinosaur until it was redescribed as a "protorosaur" reptile by Robert L. Carroll in 1988. The type species, T. fischeri, was described by F. Broili & E. Fischer in 1917 based on remains found in the Solling Formation (Buntsandstein), Bernburg, Germany. A 2024 redescription identified Trachelosaurus as a long-necked and presumably aquatic reptile closely related to Dinocephalosaurus from the Guanling Formation of China.

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