 Reference Base  Notes on the lesser one-horned rhinoceros, Rhinoceros son... |
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Colbert, E.H., 1942. Notes on the lesser one-horned rhinoceros, Rhinoceros sondaicus, 2. The position of Rhinoceros sondaicus in the phylogeny of the genus Rhinoceros. American Museum Novitates 1207: 1-5, figs. 1-3
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World |
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Taxonomy - Evolution |
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Fossil |
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4 species recognized in genus Rhinoceros, including:
Rhinoceros sivalensis Falconer and Cautley, 1847. Synonym: R. palaeindicus. Pleistocene of the Siwalik Hills of India.
Rhinoceros sivalensis, on the other hand, would seem to be rather close to Rhinoceros unicornis. The extinct form is a large species, showing in the structure of the skull (the large horn boss, the deep saddle in the cranial profile, the forwardly inclined occiput, the depth of the skull and the like) a close approach to the modern Indian form. The cheek teeth in this species are characterized by a rather flat ectoloph but by a certain retention of the parastyle buttress, while the crochet and crista have not reached that stage in developement where they join to enclose a medifossette.
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