What characteristic distinguish lagomorphs from rodents?

Lagomorphs, which include rabbits, hares, and pikas, are distinguished from rodents primarily by their dental structure. Lagomorphs possess four incisors in the upper jaw (two pairs) compared to rodents, which have only one pair of upper incisors. Additionally, lagomorphs have a unique digestive system adapted for their herbivorous diet, including a cecum that aids in fermentation. These anatomical and physiological differences set them apart as a distinct order within mammals.