Richard Emil Benjamin Sadebeck (20 May 1839 in Breslau – 11 February 1905 in Meran) was a German pteridologist and mycologist. He was an older brother of mineralogist Alexander Sadebeck (1843–1879).
He studied natural sciences at the University of Breslau as a pupil of Heinrich Göppert. From 1865 to 1876 he worked as a schoolteacher in Berlin, and afterwards relocated to Hamburg, where he taught classes at the Johanneum. From 1883 to 1901 he was director of the Hamburg Botanical Museum.[1][2]
In 1893 he described the fungal genus Magnusiella (syn. Taphrina).[3]