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1.
中国鞍腹水虻亚科二新纪录属种记述(双翅目,水虻科)   总被引:1,自引:1,他引:0  
报告了水虻科Stratiomyidae鞍腹水虻亚科Clitellarinae中国2新纪录属及种,即毛面水虻属Campeprosopa Macquart及长刺毛面水虻Campeprosopa longispina(Brunetti),和优多水虻属Eudmeta Wiedmann及王冠优多水虻Eudmetadia dematipennis Brunetti,其中王冠优多水虻的雄性描述系首次报道。并补充描述了王冠优多水虻Eudmeta diadematipennis形态特征及雄性外生殖器图。研究标本保存在贵州大学昆虫研究所。  相似文献   

2.
记述中国贵州短角水虻属1新种——谭氏短角水虻Odontomyia tani sp.nov.,绘制了鉴定特征图.模式标本保存在贵州省林业科学研究院标本馆.  相似文献   

3.
短角水虻属OdontomyiaMeigen为水虻科一大属,全世界已知近210种,中国记载过12种。本文对中国短角水虻属作了综述性总结,记载了5新种(双斑短角水虻Odontomyiabimaculata,贵州短角水虻O.guizhouensis,中华短角水虻O.sinica,黑盾短角水虻O.uninigra,杨氏短角水虻O.yangi),同时对4已知种进行了再描述,并编制了中国已知种类的检索表。新种的模式标本存于北京农业大学昆虫标本馆。  相似文献   

4.
首次报道我国贵州距水虻属Allognosta 4个种(包括3新种或亚种),即背斑距水虻A.dorsalis sp.nov.,梵净山距水虻A.fanjingshana sp.nov.,斑胸距水虻A.maculipleura Frey 和黑腿距水虻Allognosta flavofemoralis nigrifemur subsp.nov,.模式标本保存在中国农业大学昆虫博物馆.  相似文献   

5.
记述中国水虻亚科1新记录属:诺斯水虻属Nothomyia Loew,1869及2新种:即长茎诺斯水虻N. elongoverpa sp. nov.和云南诺斯水虻N. yunnanensis sp.nov.模式标本保存在贵州大学昆虫研究所标本馆。  相似文献   

6.
记述线角水虻属4新种,即离斑线角水虻N. dissitus sp.nov.,黄颜线角水虻N.faciflavus sp.nov.,黄腹线角水虻N.ventiflavus sp.nov.和新疆线角水虻N.xinjianganus sp.nov,.模式标本保存在中国农业大学昆虫博物馆.  相似文献   

7.
记述中国距水虻属Allognosta Meigen 6新种,即保山距水虻 A.baoshana,sp.nov.,红河距水虻A.honghensis,sp.nov.,金平距水虻A.jinpingensis,sp.nov.,单斑距水虻A singularis,sp.nov.,腾冲距水虻A.tengchongana,sp.n...  相似文献   

8.
记述我国星水虻属2新种,即黄端星水虻Actina apiciflava sp.nov.和梵净山星水虻属Actina fanjingshana sp.nov,.模式标本保存在中国农业大学昆虫博物馆.  相似文献   

9.
中国距水虻属新种记述(双翅目,水虻科)   总被引:1,自引:1,他引:0  
记述我国距水虻属Allognosta 4新种,即黑端距水虻A.apicinigra sp.nov.、刘氏距水虻A.liui sp.nov.、宁夏距水虻A.ningxiana sp.nov.和雁山距水虻A.yanshana sp.nov,.模式标本保存在中国农业大学昆虫博物馆.  相似文献   

10.
@@ 本文记述中国星水虻属3新种,即双斑星水虻Actina bimaculata,sp.nov.,三斑星水虻A trimaculata,sp.nov.和单斑星水虻A unimaculata,sp.nov..模式标本保存在中国农业大学昆虫博物馆.  相似文献   

11.
Two species of the pompilid genus Agenioideus occurring in Japan are described: A . ( Agenioideus ) kokyo and A . ( A .) cinctellus . The former is new to science and the latter is recorded from Japan and Taiwan for the first time. A brief summary of the biology of A. cinctellus , distinguishing characters between A. ( A. ) ishikawai Shimizu, 1989 and its relatives, and a key to all Japanese species of this genus are presented. Psammochares cinctellus f. rufa Haupt, 1938 and A . ( A. ) pacificus Lelej, 1994 are newly synonymized with A. cinctellus . A new combination is proposed: A . ( A .) maculipes (Smith, 1870) (= Pompilus maculipes Smith), which is found in Southeast Asia to South Asia. Agenioideus ishikawai is newly recorded from Korea and China.  相似文献   

12.
13.
在对中国黄耆属植物进行研究的过程中,发现一些不同时期发表的类群存在同物异名现象。对这些类群进行了归并,将Astragalus dulanensis Y.H.Wu作为A.variabilis Bunge的新异名,A.hepingensis Liou f和A.mongutensis Lipsky作为A.kuschakewiczi B.Fedtsch ex O.Fedtsch的新异名,A.zhaolingicus K.T.Fu作为A.galactites Pall.的新异名,A.xipingshanicus Y.H.wu作为A.minshanensis K.T.Fu的新异名,A.transiliensis Gontsch.var.microphyllus S.B.Ho作为A.ochrias Bunge的新异名。  相似文献   

14.
The genus Annesorhiza is revised and twelve species are recognized, of which two are newly described: A. altiscapa, A. burttii, A. flbrosa, A. flagellifolia, A. grandiflora, A. lateriflora, A. latifolia, A. macrocarpa, A. nuda, A. schlechteri, A. thunbergii and A. wilmsii. A. marlothii is reduced to synonymy under A. lateriflora , a species hitherto poorly known as Peucedanum lateriflorum. A. thunbergii is only known from the type specimen. A. elata, A. hirsuta and A. villosa are sunk under A. grandiflora. A. fúicaulis has recently been excluded from Annesorhiza on the basis of fruit structure. A key to the species is provided, an update on the nomenclature, typification of names and distribution maps are provided for all the species.  相似文献   

15.
12种中国葱属植物的核型分析   总被引:5,自引:1,他引:4  
采用细胞压片法,对采自中国西部的12种葱属植物的根尖有丝分裂中期进行了观察,其巾天蓝韭(A.cyaneum)、梭沙韭(Aforrestii)、昌都韭(A.changduense)、西川非(A.xichuanense)、野黄韭(A.rude)、野葱(A.chrysanthum)和真籽韭(A.eusperma)等7种植物的核型为首次报道.供试类群中,峨眉韭(A.omeiense)和多星韭(A.wallichii)的染色体基数分别为11和7,其余类群的染色体基数均为8.观察发现,随体杂合和多侪性现象在供试类群中很普遍.分析推测:(1)随体和倍性的变异在葱属某些类群的进化中可能起重要作用,随体的类型在葱属具有重要的分类意义;(2)多倍化和地下走茎的无性繁殖方式可能是天蓝韭(A.cyaneum)的进化策略;(3)西川韭(A.xichuanense)、野黄非(A.rude)和野葱(A.chrysanthum)有密切的亲缘关系;(4)真籽韭(A.eusperma)与多籽组在核型上有密切的亲缘关系.  相似文献   

16.
MacroH2A histones are variants of canonical histone H2A that are conserved among vertebrates. Previous studies have implicated macroH2As in epigenetic gene-silencing events including X chromosome inactivation. Here we show that macroH2A is present in developing and mature mouse oocytes. MacroH2A is localized to chromatin of germinal vesicles (GV) in both late growth stage (lg-GV) and fully grown (fg-GV) stage oocytes. In addition, macroH2A is associated with the chromosomes of mature oocytes, and abundant macroH2A is present in the first polar body. However, maternal macroH2A is lost from zygotes generated by normal fertilization by the late 2 pronuclei (2PN) stage. Normal embryos at 2-, 4-, and 8-cell stages lack macroH2A except in residual polar bodies. MacroH2A protein expression reappears in embryos after the 8-cell stage and persists in morulae and blastocysts, where nuclear macroH2A is present in both the trophectodermal and inner cell mass cells. We followed the loss of macroH2A from pronuclei in parthenogenetic embryos generated by oocyte activation. Abundant macroH2A is present upon the metaphase II plate and persists through parthenogenetic anaphase, but macroH2A is progressively lost during pronuclear decondensation prior to synkaryogamy. Examination of embryos generated by intracytoplasmic sperm injection (ICSI) revealed that macroH2A is associated exclusively with female pronuclei prior to loss in late pronucleus stage embryos. These results outline a surprising finding that a maternal store of macroH2A is removed from the maternal genome prior to synkaryogamy, resulting in embryos that execute three to four mitotic divisions in the absence of macroH2A prior to the onset of embryonic macroH2A expression.  相似文献   

17.
中国东北科尔沁沙地两种建群植物的抗旱机理   总被引:18,自引:0,他引:18  
周海燕 《植物研究》2002,22(1):51-55
在土壤田间持水和干旱胁迫条件下 ,对冷蒿和差巴嘎蒿的多个抗旱性生理指标进行了测定 ,结果表明 :1、在两种土壤水分状况下 ,冷蒿的水势低于差巴嘎蒿 ,水分相对亏缺、束缚水含量、束缚水与自由水比值、综合抗旱性指数均明显高于差巴嘎蒿 ,且胁迫前后冷蒿上述指标的变化幅度高于差巴嘎蒿。 2、土壤田间持水量条件下冷蒿干物质累积量、硝态氮含量和硝酸还原酶活性高于差巴嘎蒿 ,可溶性蛋白质含量和叶绿素含量低于差巴嘎蒿。水分胁迫发生时 ,冷蒿蛋白质降解的幅度高于差嘎蒿 ;冷蒿体内脯氨酸的累积量可达胁迫前的 8.2倍 ,差巴嘎蒿只达原来的 2 .2倍 ;冷蒿可溶性糖含量达胁迫前的 1 .2 9倍 ,差巴嘎蒿只达胁迫前的 0 .3 7倍 ;胁迫条件下冷蒿的叶绿素含量高于差巴嘎蒿。 3、严酷的沙区环境条件下 ,冷蒿在一日内各时刻的蒸腾速率和水势均低于差巴嘎蒿 ,且日间波动平缓  相似文献   

18.
The mechanism of action of the glutamate analogue α-aminoadipic (A A A) acid was investigated in terms of its toxicity to cultured astrocytes. A A A was more toxic to type 1 astrocytes than type 2 astrocytes. Also the higher toxicity of the L-isomer as compared to the D-isomer was seen on type 1 astrocytes but not type 2. The toxicity of A A A can be reduced by co-culture of type 1 astrocytes with microglia. This inhibition may be due to glutamate release by microglia. No such effect is seen for type 2 astrocytes. The major uptake route for A A A by type 1 astrocytes is through the sodium dependent glutamate port. Both isomers of A A A are toxic to dividing astrocytes. The D-isomer appears to be toxic only for mitotic cells. The mechanism of this toxicity is protein synthesis dependent. It is suggested that A A A is toxic to mitotic astrocytes by interference with protein synthesis needed for cell division. D-A A A as opposed to L-A A A may prove a valuable tool for investigation of astrocyte proliferation in development and disease.  相似文献   

19.
Genetic characterization of Artemia tibetiana (Crustacea: Anostraca)   总被引:1,自引:0,他引:1  
The brine shrimp Artemia consists of a number of bisexual species and a large number of parthenogenetic forms, which collectively, inhabit a wide range of hypersaline habitats. A recently described species (A. tibetiana) from a carbonate lake (Lagkor Co) in Tibet at an altitude of 4490 m has been tested with New World (A. franciscana USA, and A. franciscana feral population Vietnam) and Old World species (A. salina, A. urmiana, A. sinica) for cross fertility. These tests show complete infertility between A. tibetiana and A. franciscana . Between A. tibetiana and A. urmiana, A. sinica partial fertility through to F2 and F3 generations is evident. Allozyme and RAPD comparison of A. tibetiana with A. franciscana (USA), A. franciscana (Vietnam), A. sinica (Mongolia) and A. urmiana (Iran) show that A. tibetiana is similar to other bisexual species in mean heterozygosity (0.074) but has a somewhat higher proportion of polymorphic loci (40%, similar to that of A. urmiana ). The genetic distance between A. tibetiana and A. franciscana is 0.730, between A. tibetiana and A. urmiana is 0.475 and that between A. tibetiana and A. sinica is 0.114. FIS estimates for A. tibetiana differ significantly from zero for six loci, mainly because of lack of fit to Hardy-Weinberg expectations. This may suggest that even within the limited area of Lagkor Co there are Genétically distinct populations. © 2002 The Linnean Society of London, Biological Journal of the Linnean Society , 2002, 75 , 333–344.  相似文献   

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