The genus Gerhardodon ("Gerhard’s tooth") was named by Kielan-Jaworowska Z. and Ensom P.C. in 1992 based on a single species, Gerhardodon purbeckensis. It is known from the Berriasian (Lower Cretaceous) strata of Durlston Bay in Dorset, England. It is a multituberculate mammal from the Isle of Purbeck, Dorset. This formation is sometimes considered to be partly Upper Jurassic.
References
Kielan-Jaworowska & Ensom (1992), Multituberculate Mammals from the Upper Jurassic Purbeck Limestone Formation of southern England. Paleontology, 35, p. 95-126.
Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals". Paleontology44, p. 389-429.