Nothropus priscus and Nothropus nordenskioldi are described as subtaxa. Nothropus was named by Hermann Burmeister (1882). It was assigned to Megalonychidae by L. G. Marshall and T. Sempere (1991)[2] and to Nothrotheriidae by Christian de Muizon et al. (2004).[3]
^L. G. Marshall and T. Sempere. 1991. The Eocene to Pleistocene vertebrates of Bolivia and their stratigraphic context: a review. Fósiles y Facies de Bolivia - Vol. 1 Vertebrados (Revista Ténica de YPFB) 12(3-4):631-652