The type species, N. koholense is known from an almost complete skeleton from the site of El Kohol, southern Algeria dating from the early/middle Eocene period. The animal had the size and the appearance of a modern tapir. Its appearance were more slender and more plantigrade than the elephants', its closest modern relative.
A new species, N. savagei has been discovered in 1995 in late Eocene deposits of Dor el Talha, Libya, together with another primitive proboscidean, Barytherium grave. N. savagei may be a synonym of N. koholense.
Described species within genus Numidotherium
- N. koholense Jaeger (in Mahboubi et al.), 1986.
- N. savagei Court, 1995.