In 2006, the only Coelophysoidea (a small flesh-eating dinosaur species) fossil in Switzerland, was found by an amateur paleontologist in Frick.
Gravisauria split off in the Early Jurassic, around the Pliensbachian and Toarcian, 183 million years ago, and Aquesbi thought that this was part of a much larger revolution in the fauna, which includes the disappearance of Prosauropoda, Coelophysoidea and basal Thyreophora, which they attributed to a worldwide mass extinction.