2 Documentation of the record The concretion containing the Eurhinosaurus remains was discovered by Carol Spo¨rli (Berikon/Wettingen/AG) in a claypit ca. 200 m north of the Staffelegg-pass at an altitude of 621 m in the summer 1981 (Figs. 1, 2; Streif, 1981; Gygi & Rieber, 1988)...