Johann Conrad Ammann (December 24, 1724 in Schaffhausen – October 11, 1811 in Schaffhausen) was a Swiss physician, naturalist, and collector. After graduating at Leiden in 1749 he began to practise at Schaffhausen. He was particularly noted for his collection of fossils. He is often confused with Johann Konrad Ammann, born 1669 in Schaffhausen and died 1724 in Warmoud near Leiden. External links Brignon A. 2016. — Les poissons téléostéens d’Öhningen (Miocène, Allemagne) de la collection Johann Conrad Ammann étudiés par Georges Cuvier et leur apport à l’histoire de la paléontologie. Geodiversitas 38 (1): 33-64. http:// dx.doi.org/10.5252/g2016n1a3 1724 births 1811 deaths People from Schaffhausen Swiss naturalists 18th-century Swiss physicians 18th-century Swiss scientists