Gresslyosaurus

Gresslyosaurus (meaning "Amanz Gressly's lizard") is a genus of plateosaurian sauropodomorph dinosaur that lived during the Late Triassic period, around 214 to 204 million years ago, in Switzerland.
Taxonomy.
"Gresslyosaurus" was originally dubbed "Dinosaurus gresslyi" by Rütimeyer (1856) on the basis of postcranial remains from the Late Triassic (late Norian-Rhaetian) Knollenmergel of northern Switzerland, but that name is a "nomen nudum" as it was described in an abstract. "Dinosaurus" anyway was already in use for a junior synonym of the anteosaurid synapsid "Brithopus priscus", so Rütimeyer (1857) formally described the material as "Gresslyosaurus ingens". Lydekker (1888) synonymized "Gresslyosaurus" with "Zanclodon", but von Huene (1908) removed sauropodomorph material assigned to "Zanclodon" (which he assigned to Theropoda) and "Gresslyosaurus" along with "Plateosaurus" as sauropodomorphs. A number of authors (e.g. Steel 1970) listed "Gresslyosaurus" as valid, but Galton (1976, 1985, 1986) synonymized it with "Plateosaurus" based on comparisons with "Plateosaurus" material from Germany. Moser (2003), however, found "Gresslyosaurus" to be generically distinct from "Plateosaurus", and in their description of "Schleitheimia", Rauhut "et al." (2020) found a number of differences between "Schleitheimia" and "Gresslyosaurus".