Goldman (Smiths. Misc. Coll., 60(22):1, February 28, 1913) named the three-toed sloth from extreme eastern Panamá (Marraganti: 1 specimen, the type) and northwestern Colombia (Atrato River: 2 specimens) as Bradypus ignavus. He characterized the newly-named species as differing from Bradypus griseus (type locality Cordillera de Chucu, Veragua, Panamá) and Bradypus castaneiceps (type locality, Chontales, Nicaragua) […]