. Bulletin of the British Museum (Natural History), Geology. . Fig. 33 Occlusal and labial views of labial sides of rhinoceros upper molars from Ad Dabtiyah. Anterior sides to right. A, Dicerorhinus, a right tooth, (occlusal and reversed labial views). B, Brachypotherium, a left tooth, (labial and reversed occlusal views). Commission of Zoological Nomenclature (1977).] Dicerorhinus sansaniensis (Lartet) and the smaller D. steinheimensis Jager are best known from the Middle Miocene of Europe, D. leakeyi Hooijer from the Lower Miocene of east Africa, D. primaevus Arambourg from t
. Bulletin of the British Museum (Natural History), Geology. . Fig. 33 Occlusal and labial views of labial sides of rhinoceros upper molars from Ad Dabtiyah. Anterior sides to right. A, Dicerorhinus, a right tooth, (occlusal and reversed labial views). B, Brachypotherium, a left tooth, (labial and reversed occlusal views). Commission of Zoological Nomenclature (1977).] Dicerorhinus sansaniensis (Lartet) and the smaller D. steinheimensis Jager are best known from the Middle Miocene of Europe, D. leakeyi Hooijer from the Lower Miocene of east Africa, D. primaevus Arambourg from the Upper Miocene of north Africa and D. schleiermacheri (Kaup) from the Upper Miocene (Vallesian and Turolian) of Europe. Diceros pachygnathus (Wagner) from the Turolian of Pikermi, Greece, lacks lower incisors but is otherwise very similar to Dicerorhinus schleiermacheri. Dicerorhinus sansaniensis is known back to the Orleanian or late Lower Miocene in Europe (Heizmann et al. 1980: 7; Guerin 1980: 201). Finally it may be mentioned that '' Aceratherium abeli Cooper (1934: 596) from Dera Bugti appears to be a Dicerorhinus, as already noted by Heissig (1972:27). 6. The African horned rhinoceros Paradiceros mukirii Hooijer (1968) from the Middle Miocene of Fort Ternan, Kenya (Shipman et al. 1981), related to Diceros. 1. A rather incompletely known group of Miocene horned rhinoceroses held to be related to the Pliocene and Pleistocene Elasmotherium Fischer of Asia and centred on Hispanotherium Crusafont & Villalta, within which Ginsburg & Antunes (1979) would also include the Asiatic Beliajevina Heissig and Caementodon Heissig. Hispanotherium appeared for only a limited duration in Spain and Portugal (Antunes 1979: 20) and is known at what is probably a later horizon in Turkey (Heissig 1976). The African Chilotheridium pattersoni Hooijer (1971) and possibly the Chilotherium Ringstrom of the Chinese Hipparion faunas (Ringstrom 1924), as well as the much earlier Chilotherium
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