Teleoceras shares several adult characters with the extant rhinos, such as a strong mandibular angle (Diceros, Rhinoceros), a deep mandibular body (Ceratotherium), and a high zygomatic arch (Rhinoceros). Teleoceras displays ontogenetic patterns not present in extant rhinos. For example, a strong mandibular angle and a robust zygomatic arch develop earlier in Teleoceras major than in Rhinoceros and Diceros. In addition, the mandibular body in juvenile Teleoceras is slender and tapers anteriorly as in adult Rhinoceros and Dicerorhinus, yet it develops into a deep body that is characteristic of Ceratotherium at all age classes. Despite these differences, some developmental patterns are consistent, such as the transition of the lower second incisor into tusk-form at Age Class 8 in Teleoceras, Rhinoceros, and Dicerorhinus. A geometric morphometric analysis of ontogenetic shape change further compares developmental patterns.