From the available data related to this study (Amadon; McMahon; Gatesy & Biewener; Day & Jayne; Persons IV & Currie), we excluded those species that show morphological restrictions to locomotor performance at high velocities as graviportal
mammals due to their columnar limbs and immobile ankles (e.g.
Coleman has also remarked that the rhino on Domitian's coins was portrayed accurately, except for its hind legs, (25) "which have a pronounced 'elbow', like those of a bear, instead of being graviportal
The similarities between them are large size, columnar (graviportal
or pillar-like) limbs, a proboscis (trunk), and large tusks (specialized incisor teeth).