Cope, E.D., 1881. The systematic arrangement of the order Perissodactyla. Proceedings of the American Philosophical Society 19: 377-401, figs. 1-2, tables 1-3
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| Location: |
World |
| Subject: |
Taxonomy - Evolution |
| Species: |
All Rhino Species |
There is a graduated series, with successive modifications of four parts of the skeleton:
1. reduction of the number of toes on anterior foot
2. reduction in the number and development of the canine and incisor teeth
3. degree of closure of the meatus auditorius externus below
4. development of the dermal horns on the nose and its supports.
Coelodonta
Rhinoceros Atelodus
Ceratorhinus Peraceras
Aphelops
Zalabis Coenopus Diceratherium
End
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The systematic arrangement of the order Perissodactyla
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