Abstract
The rhinoceros tongue is distinguished among perissodactyl organs by its sagittally divided intermolar eminence crowned by a dextral and a sinistral cluster of circumvallate papillae. These structures were originally noted in the Indian rhinoceros by Owen (1852) but have since remained unmentioned for this, or for any other rhinoceros form. They are here described for specimens of the Indian, African White and African Black rhinoceroses. The structural and functional nature of the intermolar eminence is established and this entity is distinguished from an hitherto unrecognized topographical component of the tongue, designated the pars elliptica linguae. The lingual morphology of the three rhinoceros forms is summarised and certain intergeneric differences are noted.
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