 Reference Base  Preliminary studies on the anatomy and ultrasonic images ... |
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Schaffer, N.E.; Beehler, B.A., 1990. Preliminary studies on the anatomy and ultrasonic images of the reproductive structure of three species of rhinoceros (Rhinoceros unicornis, Diceros bicornis, Ceratotherium simum). Proceedings of the American Association of Zoo Veterinarians 1990: 242-248, 2 figures, 1 table
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| Location: |
World |
| Subject: |
Anatomy - Reproductive organs |
| Species: |
All Rhino Species |
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Gross anatomical examinations of the penis and testicles were performed in Ceratotherium simum, Diceros bicornis, Rhinoceros unicornis. The tip of the flaccid penis is directed caudally. During erection, the penis extends from the sheath and the glans swings forward. The fully erect penis extends horizontally from the sheath in a cranial direction. The penis is musculocavernous with expandable cavernous lateral projections. In these 3 species, these projections are located on the midsection of the penis. When erect on the R.unicornis, these projections are dorsolateral long, horizontal flaps; however, on both African species they are more vertical.
The testicles are extra-abdominal and are located within the same skinfold as the penis. The testicles are oblate spheroids with a cranial-caudal longitudinal axis. The long axis becomes more vertical if the testicles are drawn up toward the inguinal canal.
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