It is the first time to document the trilobite Mucronaspis(Songxites) wuningensis and the brachiopod ParomalomenaAegiromenella Assemblage from the Xinkailing Bed(Hirnantian, uppermost Ordovician) in Taoyuan and Cili c...It is the first time to document the trilobite Mucronaspis(Songxites) wuningensis and the brachiopod ParomalomenaAegiromenella Assemblage from the Xinkailing Bed(Hirnantian, uppermost Ordovician) in Taoyuan and Cili counties,northwestern Hunan Province. Synecological analysis shows that this is a deep water shelly fauna of South China during the Hirnantian. It lived on the upper Jiangnan Slope in northwestern Hunan, adjacent to the southeast margin of the Upper Yangtze Region, and belongs to the Hirnantia fauna with cool and deep water, and low diversity affinity, similar to its contemporary shelly faunas from the southern Shaanxi Slope adjacent to the north margin of the Upper Yangtze Region, the northern Chongqing depression(new name), and the Jiangxi-Anhui-Jiangsu gentle slope of the Lower Yangtze Region. Paleoecologically,it could be attributed to the BA 4–5 benthic regime(about 60–150 m deep, and deepest to 200 m), and was significantly different from the trilobite M.(S.) mucronata and the typical Hirnantia fauna while the latters may have habited in BA 2–3 benthic regimes(about 5–60 m deep). A new paleogeographic distribution pattern of the Hirnantian shallow and deep water shelly faunas of South China is herein proposed for the first time. Assuming that the depositional rate was constant in northwestern Hunan during the end Ordovician, the duration of the Xinkailing Bed might be only 12 thousand years according to the thickness of the Wufeng Formation and the absolute age values of those relevant graptolitic biozones. Such a short time interval may indicate that the global environmental change during the crisis was much shorter than previously thought, and its influence on the deep water regime was significantly shorter than that on the shallow water regime.展开更多
前言 齧齿动物种类多,分布广,主要以粮食、經济作物和野生植物的枝叶和种子为食;同时挖掘洞穴、破坏植被,与农业、林业和卫生事业的关系很密切,因此研究齧齿动物具有一定的实践意义。有关哈尔滨地区兽类的調查研究,虽然前人作过一些,但...前言 齧齿动物种类多,分布广,主要以粮食、經济作物和野生植物的枝叶和种子为食;同时挖掘洞穴、破坏植被,与农业、林业和卫生事业的关系很密切,因此研究齧齿动物具有一定的实践意义。有关哈尔滨地区兽类的調查研究,虽然前人作过一些,但零碎片段,并且只限于分类报导。其中仅.A. S. Loukashkin(1938)对哈尔滨地区的哺乳动物作过調查,其它的一些报告[Mori.T.(森为三)、1942,和中国科学院动物研究所兽类研究組、1958]只是或多或少地涉及到本地区的兽类。总括过去的文献記載。展开更多
THE Tibetan wild ass (Equus kiang) is widespread in the Qinghai-Tibet Plateau. It is placed in the LC (least concern) category in the IUCN (International Union for Conservation of Nature) Red List of Threatened Specie...THE Tibetan wild ass (Equus kiang) is widespread in the Qinghai-Tibet Plateau. It is placed in the LC (least concern) category in the IUCN (International Union for Conservation of Nature) Red List of Threatened Species and listed in Appendix I of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention). In 1988,展开更多
WITH a round head, slightly convex forehead, and upturned corners of the mouth, the Yangtze finless porpoise, which is rarely seen now, has colloquially become known as a “smiling angel.” In 2013, it was included in...WITH a round head, slightly convex forehead, and upturned corners of the mouth, the Yangtze finless porpoise, which is rarely seen now, has colloquially become known as a “smiling angel.” In 2013, it was included in the red list of critically endangered species by the International Union for Conser-vation of Nature （IUCN）, and also listed as an endangered species in the appen-dix I of CITES （the Convention on International Trade in Endangered Species of Wild Fauna and Flora – also known as the Washington Convention）. As the only surviving mammal in the waters of the Yangtze River, it was listed as an animal under first-grade protection at the state level in 2017.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.41290260,41521061,41530103)Chinese Academy of Sciences(Grant No.XDPB05)
文摘It is the first time to document the trilobite Mucronaspis(Songxites) wuningensis and the brachiopod ParomalomenaAegiromenella Assemblage from the Xinkailing Bed(Hirnantian, uppermost Ordovician) in Taoyuan and Cili counties,northwestern Hunan Province. Synecological analysis shows that this is a deep water shelly fauna of South China during the Hirnantian. It lived on the upper Jiangnan Slope in northwestern Hunan, adjacent to the southeast margin of the Upper Yangtze Region, and belongs to the Hirnantia fauna with cool and deep water, and low diversity affinity, similar to its contemporary shelly faunas from the southern Shaanxi Slope adjacent to the north margin of the Upper Yangtze Region, the northern Chongqing depression(new name), and the Jiangxi-Anhui-Jiangsu gentle slope of the Lower Yangtze Region. Paleoecologically,it could be attributed to the BA 4–5 benthic regime(about 60–150 m deep, and deepest to 200 m), and was significantly different from the trilobite M.(S.) mucronata and the typical Hirnantia fauna while the latters may have habited in BA 2–3 benthic regimes(about 5–60 m deep). A new paleogeographic distribution pattern of the Hirnantian shallow and deep water shelly faunas of South China is herein proposed for the first time. Assuming that the depositional rate was constant in northwestern Hunan during the end Ordovician, the duration of the Xinkailing Bed might be only 12 thousand years according to the thickness of the Wufeng Formation and the absolute age values of those relevant graptolitic biozones. Such a short time interval may indicate that the global environmental change during the crisis was much shorter than previously thought, and its influence on the deep water regime was significantly shorter than that on the shallow water regime.
文摘前言 齧齿动物种类多,分布广,主要以粮食、經济作物和野生植物的枝叶和种子为食;同时挖掘洞穴、破坏植被,与农业、林业和卫生事业的关系很密切,因此研究齧齿动物具有一定的实践意义。有关哈尔滨地区兽类的調查研究,虽然前人作过一些,但零碎片段,并且只限于分类报导。其中仅.A. S. Loukashkin(1938)对哈尔滨地区的哺乳动物作过調查,其它的一些报告[Mori.T.(森为三)、1942,和中国科学院动物研究所兽类研究組、1958]只是或多或少地涉及到本地区的兽类。总括过去的文献記載。
文摘THE Tibetan wild ass (Equus kiang) is widespread in the Qinghai-Tibet Plateau. It is placed in the LC (least concern) category in the IUCN (International Union for Conservation of Nature) Red List of Threatened Species and listed in Appendix I of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention). In 1988,
文摘WITH a round head, slightly convex forehead, and upturned corners of the mouth, the Yangtze finless porpoise, which is rarely seen now, has colloquially become known as a “smiling angel.” In 2013, it was included in the red list of critically endangered species by the International Union for Conser-vation of Nature （IUCN）, and also listed as an endangered species in the appen-dix I of CITES （the Convention on International Trade in Endangered Species of Wild Fauna and Flora – also known as the Washington Convention）. As the only surviving mammal in the waters of the Yangtze River, it was listed as an animal under first-grade protection at the state level in 2017.
