Amanzia

Amanzia (after Swiss geologist Amanz Gressly) is a genus of turiasaurian sauropod dinosaur from the Late Jurassic Reuchenette Formation in Moutier, Switzerland. The type and only species is Amanzia greppini, originally named as a species of Ornithopsis and Cetiosauriscus.

==Discovery and naming== left|thumb|Humerus, partial femur, two vertebrae, and an ungual The holotype remains were originally discovered in the 1860s, by workers in a limestone quarry in the Basse Montagne. Some of the remains were sold to collectors; when geologist Jean-Baptiste Greppin heard of this situation, he acquired all remaining bones and added them to the collection of the Naturhistorisches Museum Basel. Due to being found in association with the theropod tooth MH 350 found near Moutier that probably belonged to Ceratosaurus or an indeterminate member of the Ceratosauria, they were misidentified as belonging to a predatory dinosaur, for which Greppin in 1870 coined the name "Megalosaurus meriani" (named after Peter Merian). In 1920, Werner Janensch reassigned the tooth to the genus Labrosaurus. However, in 1922, Janensch realized the vertebrae belonged to a sauropod, so he wrote to Friedrich von Huene, who gave them the name Ornithopsis greppini. In 1927, von Huene assigned the species to his new genus Cetiosauriscus. From then on it has received little attention, with the few papers that mention it usually calling it a nomen dubium without further comment. thumb|250px|left|Size comparison After its fossils were for the first time cleaned and prepared, in 2003 by Antoine Heitz, it was realized not to be closely related to Cetiosauriscus. In 2005, a master thesis by C. Hofer was dedicated to the subject. In 2007, the rare presence of fossilised cartilage in a limb joint was reported. In 2020, Daniela Schwarz, Philip D. Mannion, Oliver Wings and Christian A. Meyer gave it the genus name Amanzia, after Swiss geologist Amanz Gressly, who was the first to discover dinosaur bones in Switzerland. Amanzia is itself the first sauropod named from Swiss remains.