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Abstract

Wilhelm Schulz (1805–1877), known in Spain as Guillermo Schulz, was one of the most outstanding representatives of the geology and mining industry in Spain during the nineteenth century. Schulz is, likewise, the author detailing the first discoveries of dinosaurs and marine reptiles in Spain. In 1858 Schulz described a supposed dinosaur tooth from the Jurassic of Ruedes (Asturias) as belonging to a shark. Schulz's description, mainly the occurrence of crenulated edges, suggests that the tooth was that of a large theropod. It probably comes from the altered grey marls of the Upper Jurassic (Kimmeridgian) Lastres Formation. Although the exact year of the discovery before 1858 is not known, the Ruedes tooth (currently lost) is presumably the earliest known discovery of a dinosaur body fossil in the Iberian Peninsula. Moreover, Schulz mentioned in 1858 the discovery of plesiosaur remains from the Liassic near Villaviciosa (Asturias). The material probably comes from the Pliensbachian marls and limestone rhythmites (Jamesoni zone) of the Rodiles Formation. As no figure was provided and the specimen is currently lost, we have no definitive certainty about its affinities. However, it represents the earliest marine reptile fossil found in Spain.

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