记录了目前分布在中国的中剑水蚤属共计10个种:刘氏中剑水蚤Mesocyclops leuckarti(Claus,1857)、温中剑水蚤M.thermocyclopoidesHarada,1931、特异中剑水蚤M.dissimilisDefaye&Kawabata,1993、北碚中剑水蚤M.pehpeiensisHu,1943、...记录了目前分布在中国的中剑水蚤属共计10个种:刘氏中剑水蚤Mesocyclops leuckarti(Claus,1857)、温中剑水蚤M.thermocyclopoidesHarada,1931、特异中剑水蚤M.dissimilisDefaye&Kawabata,1993、北碚中剑水蚤M.pehpeiensisHu,1943、奥贡中剑水蚤M.ogunnusOnabamiro,1957、邬氏中剑水蚤M.woutersiVan de Velde,1987、糙角中剑水蚤M.aspericornis(Daday,1906)、玛丽中剑水蚤M.mariaeGuo,2000、深圳中剑水蚤M.shenzhenensisGuo,2000、蒙古中剑水蚤M.mongoliensisKiefer,1981。对每一种的主要形态特征和地理分布分别做了详尽描述,给出了如何鉴定这10个种的检索表。同时还讨论和更正了过去一些学者对分布在中国的中剑水蚤属个别种诸如同物异名或同名异物的错误。展开更多
记述中国中沟细蜂属Parthenocodrus Pschorn-Walcher5种,其中包括4新种:梵净山中沟细蜂P.fanjingshanensis He et Xu,sp.nov.、褐足中沟细蜂P.fuscipes He et Xu,sp.nov.、鼓鞭中沟细蜂P.tumidiflagellum He et Xu,sp.nov.和多沟中沟细...记述中国中沟细蜂属Parthenocodrus Pschorn-Walcher5种,其中包括4新种:梵净山中沟细蜂P.fanjingshanensis He et Xu,sp.nov.、褐足中沟细蜂P.fuscipes He et Xu,sp.nov.、鼓鞭中沟细蜂P.tumidiflagellum He et Xu,sp.nov.和多沟中沟细蜂P.mutisulcus He et Xu,sp.nov.;描述了其形态特征,并与近似种做了比较;编制了世界分种检索表;各新种均附有详细特征图。模式标本存浙江大学寄生蜂标本室。展开更多
Elymus duthiei(Melderis)G.Singh,newly recorded from Xizang,China,is described and illustrated in detail.Morphologically,the species is similar to E.anthosachnoides(Keng)Á.Löve ex B.R.Lu and E.glaberrimus(Ken...Elymus duthiei(Melderis)G.Singh,newly recorded from Xizang,China,is described and illustrated in detail.Morphologically,the species is similar to E.anthosachnoides(Keng)Á.Löve ex B.R.Lu and E.glaberrimus(Keng&S.L.Chen)S.L.Chen but differs from the former in height and diameter of culms,number of nodes,width of leaf blades,and type of trichome and size of spikelets,and from the latter in distribution,height of culms,type of trichome of spikelets,and awn length.Detailed photo plates,descriptions,and distribution data are provided.展开更多
Chrysosplenium fallax Koldaeva,recently discovered and collected in Yanji,Jilin Province,repre-sents a newly recorded species of Saxifragaceae in China.This species,native to the Russian Far East,was first described a...Chrysosplenium fallax Koldaeva,recently discovered and collected in Yanji,Jilin Province,repre-sents a newly recorded species of Saxifragaceae in China.This species,native to the Russian Far East,was first described as a new species in 2021.Based on precise field investigations and specimen examination,we provide a comprehensive description of C.fallax and its seed micromorphology.Phylogenetic analysis based on chloroplast genomes of 45 Chrysosplenium species confirmed the systematic position of C.fallax in Chrysosplenium.Voucher specimens were deposited in the Herbarium of South-Central Minzu University(HSN).展开更多
Phylogeny of the cyprinid subgenus Cyprinus (Mesocyprinus ) is elucidated based on both external and osteological features. All five species of Cyprinus (Mesocyprinus ) are including in the ingroup in addition t...Phylogeny of the cyprinid subgenus Cyprinus (Mesocyprinus ) is elucidated based on both external and osteological features. All five species of Cyprinus (Mesocyprinus ) are including in the ingroup in addition to two Cyprinus (Cyprinus ) species. Procypris merus was treated as outgroup in comparison. A total of 48 characters were identified as variable among ingroup and outgroup. Phylogenetic analysis was accomplished using Parsimony and Bootstrap methods with Branch and Bound search of PAUP *. There are 28 characters remaining useful after excluding unpolarized characters and autapomorphies of terminal taxa. Analysis of the characters resulted in one tree with a length of 69 steps, Consistency Index (CI) of 0 7246, CI excluding uninformative characters of 0 6122, and Retention Index (RI) of 0 6346. It is apparent that the Mesocyprinus group consisting of five species is a polyphyletic group. This result suggests that subgenus Cyprinus (Mesocyprinus ) should be suspended.展开更多
Using VAR-DCC-GARCH model,the literature on commodity price was extended by exploring the co-movement between Chinese nonferrous metal prices and global nonferrous metal prices represented by the nonferrous metal pric...Using VAR-DCC-GARCH model,the literature on commodity price was extended by exploring the co-movement between Chinese nonferrous metal prices and global nonferrous metal prices represented by the nonferrous metal prices from London Metal Exchange(LME).The results show that LME nonferrous metals prices still have a greater impact on Chinese nonferrous metals prices.However,the impact of Chinese nonferrous metals prices on LME nonferrous metals prices is still weak except for lead price.The co-movement of nonferrous metal prices between LME and China presents hysteretic nature,and it lasts for 7-8trading days.Furthermore,the co-movement between LME nonferrous metals prices and Chinese nonferrous metals prices has the characteristics of time-varying,and the correlation of lead prices between LME and China is the more stable than all other nonferrous metals prices.展开更多
文摘记录了目前分布在中国的中剑水蚤属共计10个种:刘氏中剑水蚤Mesocyclops leuckarti(Claus,1857)、温中剑水蚤M.thermocyclopoidesHarada,1931、特异中剑水蚤M.dissimilisDefaye&Kawabata,1993、北碚中剑水蚤M.pehpeiensisHu,1943、奥贡中剑水蚤M.ogunnusOnabamiro,1957、邬氏中剑水蚤M.woutersiVan de Velde,1987、糙角中剑水蚤M.aspericornis(Daday,1906)、玛丽中剑水蚤M.mariaeGuo,2000、深圳中剑水蚤M.shenzhenensisGuo,2000、蒙古中剑水蚤M.mongoliensisKiefer,1981。对每一种的主要形态特征和地理分布分别做了详尽描述,给出了如何鉴定这10个种的检索表。同时还讨论和更正了过去一些学者对分布在中国的中剑水蚤属个别种诸如同物异名或同名异物的错误。
文摘记述中国中沟细蜂属Parthenocodrus Pschorn-Walcher5种,其中包括4新种:梵净山中沟细蜂P.fanjingshanensis He et Xu,sp.nov.、褐足中沟细蜂P.fuscipes He et Xu,sp.nov.、鼓鞭中沟细蜂P.tumidiflagellum He et Xu,sp.nov.和多沟中沟细蜂P.mutisulcus He et Xu,sp.nov.;描述了其形态特征,并与近似种做了比较;编制了世界分种检索表;各新种均附有详细特征图。模式标本存浙江大学寄生蜂标本室。
文摘Elymus duthiei(Melderis)G.Singh,newly recorded from Xizang,China,is described and illustrated in detail.Morphologically,the species is similar to E.anthosachnoides(Keng)Á.Löve ex B.R.Lu and E.glaberrimus(Keng&S.L.Chen)S.L.Chen but differs from the former in height and diameter of culms,number of nodes,width of leaf blades,and type of trichome and size of spikelets,and from the latter in distribution,height of culms,type of trichome of spikelets,and awn length.Detailed photo plates,descriptions,and distribution data are provided.
文摘Chrysosplenium fallax Koldaeva,recently discovered and collected in Yanji,Jilin Province,repre-sents a newly recorded species of Saxifragaceae in China.This species,native to the Russian Far East,was first described as a new species in 2021.Based on precise field investigations and specimen examination,we provide a comprehensive description of C.fallax and its seed micromorphology.Phylogenetic analysis based on chloroplast genomes of 45 Chrysosplenium species confirmed the systematic position of C.fallax in Chrysosplenium.Voucher specimens were deposited in the Herbarium of South-Central Minzu University(HSN).
文摘Phylogeny of the cyprinid subgenus Cyprinus (Mesocyprinus ) is elucidated based on both external and osteological features. All five species of Cyprinus (Mesocyprinus ) are including in the ingroup in addition to two Cyprinus (Cyprinus ) species. Procypris merus was treated as outgroup in comparison. A total of 48 characters were identified as variable among ingroup and outgroup. Phylogenetic analysis was accomplished using Parsimony and Bootstrap methods with Branch and Bound search of PAUP *. There are 28 characters remaining useful after excluding unpolarized characters and autapomorphies of terminal taxa. Analysis of the characters resulted in one tree with a length of 69 steps, Consistency Index (CI) of 0 7246, CI excluding uninformative characters of 0 6122, and Retention Index (RI) of 0 6346. It is apparent that the Mesocyprinus group consisting of five species is a polyphyletic group. This result suggests that subgenus Cyprinus (Mesocyprinus ) should be suspended.
基金Project(71073177)supported by the National Natural Science Foundation of ChinaProject(12JJ4077)supported by the Natural Science Foundation of Hunan Province of ChinaProject(2012zzts002)supported by the Fundamental Research Funds of Central South University,China
文摘Using VAR-DCC-GARCH model,the literature on commodity price was extended by exploring the co-movement between Chinese nonferrous metal prices and global nonferrous metal prices represented by the nonferrous metal prices from London Metal Exchange(LME).The results show that LME nonferrous metals prices still have a greater impact on Chinese nonferrous metals prices.However,the impact of Chinese nonferrous metals prices on LME nonferrous metals prices is still weak except for lead price.The co-movement of nonferrous metal prices between LME and China presents hysteretic nature,and it lasts for 7-8trading days.Furthermore,the co-movement between LME nonferrous metals prices and Chinese nonferrous metals prices has the characteristics of time-varying,and the correlation of lead prices between LME and China is the more stable than all other nonferrous metals prices.
