German lichenologist.
Johannes-Günther Knoph (8 November 1951–29 January 2019) was a German lichenologist whose research focused on the systematics and chemotaxonomy of lecideoid lichens, especially the genus Lecidella. Trained initially as a bank clerk, he later studied biology at LMU Munich and went on to hold research posts at the Free University of Berlin and the University of Jena. Through his collaboration with the chemist Christian Leuckert he became known for combining studies of secondary metabolites with classical taxonomy, producing influential treatments of Lecidella and related genera.