Selenodont dentition is common in which mammals?

• A. Beavers and porcupines
• B. Birds
• C. Deer and cattle
• D. Marine mammals like seals

Answer: (C)

Selenodont dentition describes molars with enamel forming crescent-shaped ridges, creating a curved grinding surface. This setup is especially suited for breaking down tough, fibrous plant material, a hallmark of many herbivorous hoofed mammals that rely on fermentation for digestion. Deer and cattle are classic examples of animals with this pattern, using those crescent-shaped grinding surfaces to efficiently process their plant food before it enters the digestive system. Beavers and porcupines, as rodents, have a different tooth arrangement—lophodont-type molars adapted for gnawing—so they don’t display selenodont dentition. Birds don’t have teeth at all, so the pattern isn’t applicable to them. Marine mammals like seals typically show different dentition adapted to their feeding habits, not the crescent cusps of selenodont teeth.