Dr. Gustava Kahler, née Aigner, (29 April 1906 – 22 March 1987) was an Austrian geologist and palaeontologist. She was noted in particular for her work with Franz Heritsch and with her husband, Franz Kahler. In recognition of her discovery of graptolites in the northern greywacke zone, her former fellow student, Ida Peltzmann, named two species for her.[1]