Complex sentence: To explain the size difference, Krause and colleagues suggested that "Ferugliotherium" was variable in size or that the smaller incisors were deciduous precursors of the larger permanent tooth; they considered it less likely that multiple species with similar incisors were present.
Split into simpler sentences: To explain the size difference, Krause and colleagues suggested that "Ferugliotherium" was variable in size or that the smaller incisors were deciduous precursors of the larger permanent tooth. They considered it less likely that multiple species with similar incisors were present.