Abstract
Eleven fossil-species of Rhamnus sensu lato are re-classified in currently recognized distinct genera, Atadinus, Endotropis and Frangula. New combinations are validated: Atadinus integerrimus, Endotropis idahoensis, E. moragensis, Frangula columbiana, F. deweyensis, F. palaeofrangula, F. plena, F. precalifornica, F. protocrenata, F. purshoides and F. rubyvallis. A new fossil-species F. priabonica is validated instead of invalidly published F. hordwellensis. Rhamnus precalifornica is lectotypified for the first time.