This paper reports two newly recorded species, lsohypsibius lunulatus Iharos, 1966 and lsohypsibiusprosostomus Thulin, 1928, of the genus lsohypsibius （Tardigrada; Hypsibiidae） from China. The specimens of lsohysibi...This paper reports two newly recorded species, lsohypsibius lunulatus Iharos, 1966 and lsohypsibiusprosostomus Thulin, 1928, of the genus lsohypsibius （Tardigrada; Hypsibiidae） from China. The specimens of lsohysibius lunulatus were collected from Taibai Mt （34°18′N, 107°42′E） at 2,500 m a.s.1, and those oflsohypsibius prosostomus from Taibai Mt （34°10′N, 107°35′E） at 2,000 m above sea level. All specimens are deposited at the College of Life Sciences, Shaanxi Normal University, China. A key to the Chinese species of lsohypsibius was also given.展开更多
The genus Pseudocera Walker, 1863 from China is reviewed. Pseudocera elliptica sp. nov. and P. microda sp. nov. are described as new, and P. rubrescens is newly recorded in China. Photographs of adults and genitalia a...The genus Pseudocera Walker, 1863 from China is reviewed. Pseudocera elliptica sp. nov. and P. microda sp. nov. are described as new, and P. rubrescens is newly recorded in China. Photographs of adults and genitalia are provided. A key to the three species in China is given based on the male genitalia.展开更多
Two new species in the genus Meleonoma are described from Taiwan, China： M. margisclerotica Wang sp. nov. and M. apicispinata Wang sp. nov. Diagnostic characters are provided and photos of adults and genitalia are in...Two new species in the genus Meleonoma are described from Taiwan, China： M. margisclerotica Wang sp. nov. and M. apicispinata Wang sp. nov. Diagnostic characters are provided and photos of adults and genitalia are included.展开更多
International concerns about the effects of global change on permafrost-affected soils and responses of permafrost terrestrial landscapes to such change have been increasing in the last two decades. To achieve a varie...International concerns about the effects of global change on permafrost-affected soils and responses of permafrost terrestrial landscapes to such change have been increasing in the last two decades. To achieve a variety of goals including the determining of soil carbon stocks and dynamics in the Northern Hemisphere,the understanding of soil degradation and the best ways to protect the fragile ecosystems in permafrost environment,further study development on Cryosol classification is being in great demand. In this paper the existing Cryosol classifications contained in three representative soil taxonomies are introduced,and the problems in the practical application of the defining criteria used for category differentiation in these taxonomic systems are discussed. Meanwhile,the resumption and reconstruction of Chinese Cryosol classification within a taxonomic frame is proposed. In dealing with Cryosol classification the advantages that Chinese pedologists have and the challenges that they have to face are analyzed. Finally,several suggestions on the study development of the further taxonomic frame of Cryosol classification are put forward.展开更多
Three new species of the genus Erotis Meyrick, 1910 are described based on specimens collected from Hainan Island, China, namely, E. mediconcava Wang sp. nov., E. yinggelingensis Wang sp. nov. and E. apicobtusa Wang s...Three new species of the genus Erotis Meyrick, 1910 are described based on specimens collected from Hainan Island, China, namely, E. mediconcava Wang sp. nov., E. yinggelingensis Wang sp. nov. and E. apicobtusa Wang sp. nov. Photographs of adults and genitalia are provided.展开更多
Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory en...Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.展开更多
基金This study was supported by scientific research foundation project of Shaanxi Institute of Education (No. 07KJ37Q)
文摘This paper reports two newly recorded species, lsohypsibius lunulatus Iharos, 1966 and lsohypsibiusprosostomus Thulin, 1928, of the genus lsohypsibius （Tardigrada; Hypsibiidae） from China. The specimens of lsohysibius lunulatus were collected from Taibai Mt （34°18′N, 107°42′E） at 2,500 m a.s.1, and those oflsohypsibius prosostomus from Taibai Mt （34°10′N, 107°35′E） at 2,000 m above sea level. All specimens are deposited at the College of Life Sciences, Shaanxi Normal University, China. A key to the Chinese species of lsohypsibius was also given.
基金supported by the National Natural Science Foundation of China(31672372)
文摘The genus Pseudocera Walker, 1863 from China is reviewed. Pseudocera elliptica sp. nov. and P. microda sp. nov. are described as new, and P. rubrescens is newly recorded in China. Photographs of adults and genitalia are provided. A key to the three species in China is given based on the male genitalia.
基金supported by the National Natural Science Foundation of China(31372241)
文摘Two new species in the genus Meleonoma are described from Taiwan, China： M. margisclerotica Wang sp. nov. and M. apicispinata Wang sp. nov. Diagnostic characters are provided and photos of adults and genitalia are included.
文摘International concerns about the effects of global change on permafrost-affected soils and responses of permafrost terrestrial landscapes to such change have been increasing in the last two decades. To achieve a variety of goals including the determining of soil carbon stocks and dynamics in the Northern Hemisphere,the understanding of soil degradation and the best ways to protect the fragile ecosystems in permafrost environment,further study development on Cryosol classification is being in great demand. In this paper the existing Cryosol classifications contained in three representative soil taxonomies are introduced,and the problems in the practical application of the defining criteria used for category differentiation in these taxonomic systems are discussed. Meanwhile,the resumption and reconstruction of Chinese Cryosol classification within a taxonomic frame is proposed. In dealing with Cryosol classification the advantages that Chinese pedologists have and the challenges that they have to face are analyzed. Finally,several suggestions on the study development of the further taxonomic frame of Cryosol classification are put forward.
基金supported by the National Natural Science Foundation of China(31672372)
文摘Three new species of the genus Erotis Meyrick, 1910 are described based on specimens collected from Hainan Island, China, namely, E. mediconcava Wang sp. nov., E. yinggelingensis Wang sp. nov. and E. apicobtusa Wang sp. nov. Photographs of adults and genitalia are provided.
基金Supported by Projects of National Natural Science Foundation of China ( Nos. 40902077,41111120084,41172236)
文摘Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.
