Johannes Peter Müller
He then published a very important work, "l’Erpétologie générale ou Histoire naturelle complète des reptiles" (nine volumes, 1834–1854). In this, 1,393 species are described in detail and their anatomy, physiology, and bibliography are specified. However, Duméril maintained the amphibians among the reptiles in spite of the work of Alexandre Brongniart or Pierre André Latreille or the anatomical discoveries of Karl Ernst von Baer (1792–1876) and Johannes Peter Müller (1801–1858).