Ungulate
Ungulates (meaning roughly "hoofed[?]" or "hoofed animal") make up several orders of mammals, of which six survive:
- Artiodactyla (even-toed ungulates)
- Cetacea (whales, which evolved from hoofed land animals)
- Perissodactyla (odd-toed ungulates such as horses and rhinos)
- Proboscidea (elephants)
- Sirenia (manatees)
- Hyracoidea (hyraxes).
Extinct ungulate groups include Ancylopoda, Amblypoda and Condylarths.
In addition to hooves, ungulates developed reduced canine teeth[?], bunodont molars (molars with low, rounded cusps), and an astragalus[?] (one of the ankle bones at the end of the lower leg) with a short, robust head.
Ungulates diversified rapidly in the Eocene, but are thought to date back perhaps as far as the Late Cretaceous. Most ungulates are herbivores, but a few are omnivores or predators (e.g. some whales).
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