DOI: 10.1016/j.palaeo.2016.02.026
论文题名: A combined-mesowear analysis of late Miocene giraffids from North Chinese and Greek localities of the Pikermian Biome
作者: Danowitz M. ; Hou S. ; Mihlbachler M. ; Hastings V. ; Solounias N.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 449 起始页码: 194
结束页码: 204
语种: 英语
英文关键词: Diet
; Giraffidae
; Mesowear
; Pikermian Biome
英文摘要: The family Giraffidae is represented by two extant taxa (Giraffa camelopardalis and Okapia johnstoni), both of which are committed browsers. During the late Miocene, however, the Pikermian Biome included more than 15 giraffid species with a wider range of dietary ecologies. To examine the diet of these taxa, we apply a novel combined approach using four variables from two methods of dental mesowear. We score the traditional outer mesowear, which evaluates the sharpness and relief of the labial-most paracone enamel band. We also apply inner mesowear, which evaluates the surface morphology of the lingual band of paracone enamel on the mesial and distal ends, as well as the junction point between the two. Using a database of 8 extant species (N = 98) of browsing, grazing, and mixed feeding ruminants, we predict the diets 190 extinct giraffid specimens. The discriminant function analysis (DFA) of the extant taxa using all four mesowear variables predicted diet with greater accuracy than any single mesowear variable. We compare the dietary profiles of species found in four Pikermian Biome regions: Samos, Pikermi, North China, and Linxia Basin. We find differences in the giraffid diet throughout the Pikermian Biome: in the localities from Greece, a larger number of giraffids were predicted as browsers, whereas both Chinese regions included a larger number of mixed feeding individuals. Our inner and outer mesowear dietary predictions agree with previously studied ecomorphological paleodietary proxies. Our data supports the hypothesis that the late Miocene giraffids comprised a wider range of dietary habits than the living giraffe and okapi. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68495
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Anatomy, New York College of Osteopathic Medicine of New York Institute of Technology, Old Westbury, NY, United States; Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China; Department of Paleontology, American Museum of Natural History Central Park West, 79th Street, New York, NY, United States
Recommended Citation:
Danowitz M.,Hou S.,Mihlbachler M.,et al. A combined-mesowear analysis of late Miocene giraffids from North Chinese and Greek localities of the Pikermian Biome[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,449