What are the features of the structure of teeth in artiodactyls and equids?

Animals of these two orders feed on plant foods. The dental apparatus of ruminant artiodactyls (elk, camel, deer, bison, giraffe) consists of incisors only on the lower jaw and molars with a wide chewing surface. Non-ruminant artiodactyls (wild boar, hippopotamus) have all types of teeth on their jaws: incisors, canines and molars.
Equid-hoofed animals (horse, zebra, donkey, rhino) eat only plant foods. They have incisors on the upper and lower jaws, as well as molars with a wide folded surface. Canine teeth are missing.

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