|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Giant rhinoceroses of the Oligocene of Central Kazakhstanстатья
- Автор: Kordikova Elena G.
- Журнал: Journal of Vertebrate Paleontology
- Том: 15
- Номер: 3
- Год издания: 1995
- Издательство: Society Of Vertebrate Paleontology
- Местоположение издательства: United States
- Первая страница: 39A
- Последняя страница: 40A
- DOI: 10.13140/RG.2.2.33215.93604
- Аннотация: Indricotheriidae is a distinct family of giant rhinoceroses more derived than Hyracodontidae. Body size is increased, sometimes to giganticproportions, with a simultaneous relative elongation of extremities and cervical vertebrae, reduction of manual digits from 4 to 3 and ofincisors to I1/1, the transformation of these last into tusks, and so on.Indricotheriids include Forstercooperia Wood, 193; Juxia Chow anđ Chiu, 1964; Urtinotherium Chow and Chiu, 1963; Indricotherium Borissiak, 1915;and Paraceratherium Foster Cooper, 1911.Characters of the postcranlal skeleton in species of Inđricotherium and Paraceratherium, i.e. thę structure of the carpal and tarsal bones, namely, the number of articular facets, their morphology and their presence or absence on the bones, which have taxonomic value for recent Rhinocerotoidea as well, are beyond the framework of the individual and specific variability for these genera. Analysis of sexually dimorphic characters in living rhinoceroses (Diceros, Rhinoceros and Ceratotherium) and other closely related forms shows that they are pronounced on the sand are also related to the development of tubercula, crests and rugosities on the long bones and pelvis.The Early Oligocene indricotheriids of Kazakhstan were found in the Turgay Basin, to the north of the Aral sea in the Zaysan Depression.At least two specios of giant rhinoceroses lived at that time: Indricotherium transouralicum Pavlova, 1921 and I. minus Borissiak, 1923(Pristinotherium brevicervicale Birjukov, 1963; I. transouralicum part. Gromova, 1959). Our conclusions on sexual dimorphism inindricotheriids allow us to reject the opinion that I. minus is a female of I. transourolicum. I. minus can be diagnoseđ by a suite of synapomorphies unrelated to size.
- Добавил в систему: Кордикова Елена Георгиевна