rear feet are also more horizontally oriented, which is suggested by the structure of the ankle bone with a forward-facing joint head. The joint facets of the foot bones, which are sometimes clearly positioned to the side, indicate that the individual bones (metapodia and phalanges) were rather spread apart. All in all, it can be assumed that Numidotherium has a sole passage. This is in clear contrast to today's elephants, which have column-like limbs arranged under the body, which can carry the heavy weight. The front and rear feet, with their more vertical structure, show a semi-plantigrade posture (which, however, is again supported by the foot pad). The cochlea of Numidotherium, which is built somewhat differently than that of today's elephants, turned out to be a further specialty. In Numidotherium, for example, this has one and a half turns, whereas in elephants it has two. In the basal area of the winding, there are deviations in detail, for example in the clear formation of the lamina spiralis secundaria, which is responsible, among other things, for the perception of certain frequencies. Researchers therefore suspect that Numidotherium was more likely to perceive sounds in the higher frequency range, in contrast to today's elephants, which can also communicate in infrasound. The lower number of coils of the cochlea in Numidotherium'' also suggests a more limited auditory perception.<ref name="court1992"/ References Eocene proboscideans Prehistoric placental genera Eocene mammals of Africa Fossil taxa described in 1986