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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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MIOCENE RINOCEROSES OF SOUTHERN-WESTERN BETPAKDALA STEPPE, SOUTH KAZAKHSTANстатья
- Авторы: Kordikova Elena G., De Bonis Louis, Brunet Michel, Mavrin A.V.
- Журнал: Journal of Vertebrate Paleontology
- Том: 18
- Номер: 3
- Год издания: 1998
- Издательство: Society Of Vertebrate Paleontology
- Местоположение издательства: United States
- Первая страница: 56A
- DOI: 10.13140/RG.2.2.14079.42405
- Аннотация: Among numerous mammalian remnants found in 1995 by joint Kazakhstan- French expedition in the South-Western Betpakdala Steppe region, Southern Kazakhstan well preserved lower jaws, teeth, bones of postcranial skeletons of rhinoceroses were recovered from the Upper Member of Askazansor Formation of Askazansor locality. They are represented by three endemic species of rhinos refered to Diaceratherium, Protaceratherium (Teleoceratini) and "Aceratherium" (Aceratherini). Large rhinoceroses belonging to Diaceratherium have hypsodont teeth, molarized premolars and weakly developed cingula as well as rather massive astragali and calcanei. The dental morphology of the rhinoceroses probably points to browsing of trees and shrubs. Small rhinoceroses refered to Protaceratherium are characterized by rather hypsodont teeth with smooth, rounded and concave external lophs as well as the primitive structure of the nonmolarized premolars. The structure of masticatory surfaces of teeth and also rounded cusps probably points to a high proportion of leaves and may be fruit in their diet. Middle size rhinoceroses having hypsodont teeth with quite developed numerous cingula as well as gracile astragali with high neck and calcanei, appear to belong to Aceratherini. Their morphological pattern appeared to provide evidence of grazing-feeding on grassland grasses. Based on findings of rhinocerotoids as well as other mammals, the age of the upper part of the Askazansor Fm. (Askazansor loc.) appears to be the Lower Miocene and corresponds to MN2 of European zonation.
- Добавил в систему: Кордикова Елена Георгиевна