Brachyscirtetes tomidai, a new Late Miocene dipodid (Rodentia, Mammalia) from Siziwang Qi, central Nei Mongol, China

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	Brachyscirtetes tomidai, a new Late Miocene dipodid (Rodentia, Mammalia) from Siziwang Qi, central Nei Mongol, China
	Li, Qiang 1,2
	2016-02-17
发表期刊	HISTORICAL BIOLOGY
卷号	28 期号:1-2 页码:35-42
文章类型	Article
摘要	Based on the dipodid materials collected from Siziwang Qi, Nei Mongol in 2009, a new species Brachyscirtetes tomidaisp. nov. is erected. It is characterised by its smaller size, more bunodont paracone on M2, more separate mesoloph and posteroloph on M2 and separate mesolophid on m2, more longitudinally symmetrical protoconid-metaconid complex diverging at an obtuse angle and elongated anterior part of ectolophid on m1 than existing species. It represents the most primitive known species of this genus. Judging from the associated mammals, the age of Brachyscirtetes tomidai should be late Late Miocene. Brachyscirtetes is possibly derived from a form of early Late Miocene Paralactaga. Its dental trends include increasing size and crown height, and increasing lophodonty of occlusal morphology, which is reflected as gradual fusion of mesoloph and posteroloph with paracone, metacone on M2 and of mesolophid with entoconid on m2, respectively; the protoconid-metaconid complex on m1 shifts from a longitudinally symmetrical position to an anterolabial orientation, and the anterior part of ectolophid on m1 is gradually shortened, shifting from a longitudinal to an oblique orientation. The appearance of Brachyscirtetes and abundant herbivores indicates an arid and steppe environment in late Late Miocene Siziwang Qi area.
关键词	Dipodidae Wulanhua Fauna Nei Mongol China Late Late Miocene
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
收录类别	SCI
语种	英语
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Paleontology
WOS类目	Biology ; Paleontology
WOS记录号	WOS:000362120600005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7191
专题	中科院古脊椎所（2000年以后）
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Qiang. Brachyscirtetes tomidai, a new Late Miocene dipodid (Rodentia, Mammalia) from Siziwang Qi, central Nei Mongol, China[J]. HISTORICAL BIOLOGY,2016,28(1-2):35-42.
APA	Li, Qiang.(2016).Brachyscirtetes tomidai, a new Late Miocene dipodid (Rodentia, Mammalia) from Siziwang Qi, central Nei Mongol, China.HISTORICAL BIOLOGY,28(1-2),35-42.
MLA	Li, Qiang."Brachyscirtetes tomidai, a new Late Miocene dipodid (Rodentia, Mammalia) from Siziwang Qi, central Nei Mongol, China".HISTORICAL BIOLOGY 28.1-2(2016):35-42.

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