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The Skull Anatomy of Sumatran Rhino (Dicerorhinus sumatrensis)

CUT DESNA APTRIANA. The Skull Anatomy of Sumatran Rhino (Dicerorhinus sumatrensis). Under The Direction of NURHIDAYAT and CHAIRUN NISA‟.

This study was conducted with aim to describe the gross anatomical structure of the skull of a 26 years old female Sumatran rhino. The present study noted some characteristics in the skull of Sumatran rhino. The sutures among the bones were unclear. The surfaces of several bones including the nasal and the frontale bones were rough. These rough surfaces might provide as a base for the horn. The area of the eye orbit was relatively small and the zygomatic arch was less developed, formed only by the zygomatic process of temporal bone and the temporal process of zygomatic bone, respectively. The occipital bone was wide while in the mandible the masseteric fossa was deep and rough and the area of mandibular angle was thick. The dental formula was I1/0 C0/0 PM3/3 M3/2 without the incisive teeth on the lower jaw. CT-scanned images revealed a relative small brain cavity and well developed nasal cavity. The present results suggested that the Sumatran rhino might have a small brain, less developed eye but well developed olfactory function. The data were discussed and compared with those of other animals such as horse and pigs that have a close phylogenetic and anatomic relationship with the rhino.

Keywords: The morphology of skull, horn of the Sumatran rhinoceros, CT-scan.


Labels: Badak Sumatera

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