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黑龙江省蛇类物种多样性调查及保护 总被引:1,自引:1,他引:0
通过多年的野外调查和采集,共在黑龙江省31个县(市、区)获得蛇类标本592号.结合有关资料记载,证实黑龙江省蛇类隶属2科6属11种,约占我国蛇类总数的5.42%,均属于古北界物种,与国内其他省相比黑龙江省蛇类物种多样性水平较低,种群数量较少.建议加强对蛇类保护生物学的研究及其生境的保护,合理开发利用蛇类资源. 相似文献
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蛇类在药用、食用及化工都有着广泛的用途,市场需求量大,价值高.然而,我国野生蛇类资源已逐年减少,野生蛇的规格、质量也逐年下降,人类利用蛇类资源必须靠人工驯养繁殖,把野生变为家养,才能满足人类对蛇类资源的需求. 相似文献
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时间蛇类喜欢在太阳光下进行日光浴,时间一般为10~14时左右。蛇享受日光浴时,一般伏于地面草丛或缠绕于树干上,也有半身裸露于洞口外、石头堆外面,呈盘蜷状,姿态变化多端。蛇类的活动规律因种类而异,以昼伏夜出居多。晚上,蛙类和啮齿类活动非常活跃,容易吸引蛇来捕食,尤其天气闷热的夜晚8点到12点是蛇类活动的最高峰。 相似文献
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湖南师范大学动物生态研究室1993年8月采于湖南省永顺县的蛇类标本HUNNU9308001,经鉴定为平鳞钝头蛇(Pareas boulengeri),为湖南省蛇类新记录. 相似文献
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贵州罗甸纳水上石炭统(宾夕法尼亚亚系)地层的再研究 总被引:5,自引:0,他引:5
本文详细描述了贵州罗甸纳水上石炭统(宾夕法尼亚亚系)剖面的生物地层和年代地层,其牙形刺序列自上而下可详细划分为:Streptognathodus isolatus, S. wabaunsensis, S. tenuialveus, S. firmus, Idiognathodus nashuiensis , Streptognathodus simulator, S. guizhouensis , S. gracilis-S, excelsus , S. cancellosus , S. clavatulus , S. nodocarinatus , Idiognathodus podolskensis , Mesogondolella clarki -Idiognathodus robustus , Diplognathodus ophanus-D, ellesmerensis, Idiognathoides ouachitensis, Streptognathodus expansus, Idiognathoides sulcatus parva, Idiognathodus primulus-Neognathodus bassleri, Idiognathodus primulus-Neognathodus symmetricus, Neognathodus symmetricus, Idiognathoides corrugatus-I, pacificus, I. sinuatus, I. sulcatus sulcatus, Declinognathodus noduli ferus 和 Gnathodus bilineatus bollandensis 等带。 Declinognathodus noduliferus 和 Streptognathodus isolatus 的首次出现分别代表上石炭统(宾夕法尼亚亚系)和二叠系的开始。根据牙形刺和有孔虫的序列,罗甸纳水剖面的上石炭统(宾夕法尼亚亚系)地层自下而上可划分为罗苏阶(Luosuan)、滑石板阶(Huashibanian)、达拉阶(Dalaan)和马平阶(Mapingian),并可与俄罗斯的巴什基尔阶(Bashkirian)、莫斯科阶(Moscovian)、卡西莫夫阶(Kasimovian)和格舍尔阶(Gzhelian),北美的莫罗阶(Morrowan)、阿托克阶(Atokan)、得梅因阶(Desmoinesian)、密苏里阶(Missourian)和弗吉尔阶(Virgilian)进行对比。另外,本文也详细讨论了剖面中的石炭系中间界线及石炭-二叠系界线。 相似文献
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Ten common species of Microcystis, based on the examination of water samples from the Dianchi Lake, Yunnan, China, were morphologically described, and their taxonomy was also discussed. They are Microcystis aeruginosa, M. botrys, M. firma, M. flos-aquae, M. ichthyoblabe, M. novacekii, M. pseudofilamentosa, M. smithii, M. viridis and M. wesenbergii. Taxonomic status of other Microcystis species reported in China was also evaluated. Key words Cyanophyta, Microcystis, morphology, taxonomy, China. 相似文献
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对已报道的我国Crepidotus属种类进行了全面汇总,并概述了其分类研究现状。文献调查结果表明:国内已报道的该属种类名称共31个,包括30个种和1个变种,分布于全国26个省区。已报道的全部记录中,28个分类单元引证了标本,其余3个记录缺乏标本引证;7个记录的描述与国外权威描述存在差异,另有4个记录的报道未提供形态描述。淡紫靴耳不是Crepidotus属的成员,已被组合到其他属中。笔者接受"靴耳属"为Crepidotus属的汉语学名,并以此为属主名对属下的分类单元进行了全面修订。 相似文献
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(1) In this paper, differences among the five genera constituting the tribe Cimi cifugeae of the family Ranunculaceae are discussed. Beesia, the first genus, with compound
cymes and flowers bearing neither petals nor staminodes, is different from the other four
genera with simple or compound racemes and flowers bearing either petals or staminodes,
and may occupy a primitive position within the tribe. As to the other four genera, Souliea is
characterized by the stem without basal leaf but with 2~5 sheath-like cataphylls, the sepals
being deciduous but not caducous, moderate in size and petaloid, the petals being much
smaller than sepals, but pink in color and more or less petaloid, the pollen grains being pan tocolpate or pantoporate, the carpels being 1~3 per flower, when mature forming dry linear
follicles conspicuously reticulate on the surface and dehiscent along the ventral suture, and
the seeds being reticulate-foveolate on the surface. These diagnostic characters indicate clear ly that Souliea might have deviated from the lineage formed by the next three genera, i. e.
Anemopsis, Cimicifuga, and Actaea, which have their own well-recognizable diagnostic
characters. Anemopsis is characterized by the normally developed basal leaf, the racemose
inflorescence with sparse and few long pedicellate flowers, the sepals 7~10 in number, mod erate in size, and petaloid, the petals slightly smaller than sepals, the tricolpate pollen
grains, the carpels 2~4 per flower, stalked, when mature forming dry oblong follicles with
transverse veins on the surface, and the seeds with scaly membranous wings. Cimicifuga is
distinguished by the normally developed basal leaf, the caducous, small, often sepaloid sepa ls, the organs of the second floral whorl sometimes with empty sterile anthers being stamin odes not petals, the tricolpate pollen grains, the carpels 1~8 per flower, when mature form ing dry oblong or ovoid follicles with transverse veins on the surface, and the seeds usually
with scaly membranous wings. The last genus Actaea is different by the basal leaf trans formed into a small scale, the caducous, small, often sepaloid sepals, the organs of the sec ond floral whorl being clawed petals, the pollen grains with 3(4~6) colpi, carpel 1 per flow er, when mature forming a fleshy indehiscent berry smooth on the surface and without any
veins, the seeds roughish or slightly rugose, neither foveolate nor winged on the surface, and
the advanced most asymmetric karyotype. According to the diagnostic characters given
above, we believe that Beesia, Souliea, Anemopsis, Cimicifuga, and Actaea do represent
five independent genera, and the treatment of the tribe Cimicifugeae including these five
genera in it by Hutchinson (1923), Janchen (1949) and some other authors, has precisely
shown the taxonomic diversity within the tribe. We are therefore unable to accept the treatment published by Compton et al. (1998) to lump the two genera, Souliea and Cimicifuga, into the genus Actaea. (2) Compton et al. (1998, 1997) found out that the Chinese
plants previously identified by various authors as Cimicifuga foetida L., in which the terminal and lateral racemes of the compound raceme flower more or less simultaneously, differ
from the true C. foetida L. in northern Asia, in which the terminal raceme of the compound raceme flowers before the lateral ones, and thus restored the species name Cimicifuga
mairei Lévl. , which was formerly reduced to the synonymy of C. foetida L. , for the Chinese plants. After examining the specimens collected from Siberia and from Southwest China
we failed to find out any other differences in both vegetative and reproductive organs between
the plants of the two regions, and we consider that it is better to treat the populations in
Southwest and Central China as a geographical variety of Cimicifuga foetida L. A new
combination, Cimicifuga foetida L. var. mairei (Lévl.) W. T. Wang & Zh. Wang, is
thus made. (3) 3 species of Delphinium, 1 species and 1 variety of Clematis are described as new. 相似文献
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下毛目纤毛虫的系统修订Ⅱ. 尾柱亚目(纤毛动物门) 总被引:5,自引:0,他引:5
对尾柱亚目 Urostylina Jankowski, 1979 中的各科、属进行了重新修订.该亚目的特征为:腹面具典型的中腹棘毛或在个体发生时出现中腹棘毛.修订后的尾柱亚目共4科19属:尾柱虫科 Urostylidae 左、右缘棘毛多列或至少有一侧缘棘毛为多列;全列虫科 Holostichidae 左、右缘棘毛各一列,具典型中腹棘列毛或复合中腹棘毛列;伪小双虫科 Pseudoamphisiellidae 仅具两列发生学意义上的中腹棘毛列,两者相互间宽位分离;帕森虫科 Patteroniellidae 中腹棘毛列不甚明确,数目少,且近于散布.此外, 给出了各科及属的检索表, 并附各属纤毛图式, 对部分属进行了讨论. 相似文献
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Here we report the results of a comprehensive biogeochemical monitoring of Rostherne Mere in 1998, including changes in dissolved oxygen, organic carbon and nitrogen, nitrate/nitrite, ammonia, Al, Na, S, K, Mg, Ca, Si, Fe, Mn, orthophosphate, particulate N & P, suspended solids, temperature, pH, chlorophyll-a and zooplankton. The results demonstrated the major influence of primary producers on the overall geochemical cycling of N, P and Si, and suggested that the significance of zooplankton might have been previously underestimated. For major anions and cations, however, the influence of biota on lake water concentrations appeared to be negligible, reflecting the fact that these chemicals were present far in excess of plankton requirements. Thus changes in concentrations of Ca, K, Na, Mg and S were rather limited and must have reflected changes in hydrological and meteorological parameters. K, however, demonstrated a transitional pattern, reflecting some influence of biological uptake. During the stratification period, the slow processes of bacterial decomposition in the hypolimnion gradually released chemicals contained in the materials accumulated in the bottom layer, remarkably increasing the concentrations of dissolved compounds of those elements present in amounts comparable with the pool stored in the sedimenting detritus (e.g. orthophosphate P, ammonia N, Si and DOC). The decomposition also resulted in a drop in the redox potential, followed by partial denitrification and chemical release from the sediments. The hypolimnion of the Mere was confirmed to remain at the stage of Mn release, characterised by accumulation of DOC, orthophosphates, ammonia and initial stages of denitrification. High levels of P released from the sediments during the stratification period suggest that the lake’s recovery after sewage diversion might be further delayed. 相似文献
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Mar Orzáez Puig Mora Laura Mondragón Enrique Pérez-Payá María J. Vicent 《International journal of peptide research and therapeutics》2007,13(1-2):281-293
The Solid phase synthesis (SPS) concept, first developed for biopolymers, has spread in every field where organic synthesis
is involved. While the potential of the solid-phase method was obvious in 1959 to its discoverer, Prof. R. B. Merrifield,
it was unpredictable its dominance in peptide synthesis and especially in combinatorial chemistry, an area not yet conceived.
SPS paved the way for solid-phase combinatorial approaches (extensively reviewed in (Choong, I. C. and Ellman, J. A.: 1996,
Annu. Rep. Med. Chem. 31, 309–318; Obrecht, D. and Villalgordo, J. M.: 1998, Solid-supported Combinatorial and Parallel Synthesis of Small-Molecular-Weight Compound Libraries. Pergamon Press Ltd., Oxford, UK; Chabala, J. C.: 1995, Curr. Opin. Biotechnol. 6, 632–639; Kamal, A., Reddy, K. L., Devaiah, V., Shankaraiah, N., Reddy, D. R.: 2006, Mini Rev. Med. Chem. 6, 53–69; Whitehead, D. M., McKeown, S. C., Routledge, A.: 2005, Comb. Chem. HTS 8, 361–371; Nefzi, A., Ostresh, J. M., Houghten, R. A.: 1997, Chem. Rev. 97, 449–472; Gordon, E. M., Gallop, M. A., Patel, D. V.: 1996, Acc. Chem. Res. 29, 144–154)) as many laboratories and companies focused on the development of technologies and chemistry suitable to this
new methodology. This resulted in the spectacular outburst of combinatorial chemistry, which profoundly changed the approach
for new drug discovery. Combinatorial chemistry is currently considered a valid approach for a wide range of biomedical applications,
such as, target validation and drug discovery. 相似文献
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合腹茧蜂属Phanerotomella Szepligeti中国已知7种,本文报道1新种,西藏合腹茧蜂P.xizangensis,sp.nov.,并附中国已知种检索表,模式标本保存于浙江大学应用昆虫研究所。 相似文献
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Seed-coat anatomy in Fumariaceae-Fumarioideae 总被引:2,自引:0,他引:2
TATSUNDO FUKUHARA MAGNUS LIDÉN 《Botanical journal of the Linnean Society. Linnean Society of London》1995,119(4):323-365
Seed-coat anatomy is described in 122 species of Fumarioideae, which represent all the genera, subgenera, and most sections. Nine seed-coat types were recognized: (I) Dicentra subg. Hedycapnos , (II) Dicentra subg. Chrysocapnos , (III) Dicentra subg. Macranthos , (IV) Dicentra subg. Dicentra , (V) Corydalis p.p. , (VI) rest of Corydaleae, Cysticapnos, Pseudofumaria and Ceratocapnos , (VII) Discocapnos and Sarcocapnos p. p. , (VIII) Sarcocapnos p. p., Platycapnos and Trigonocapnos , and (IX) Fumariinae. Variable characters are polarized based on the comparison with Fumariaceae Hypecooideae, Papaveraceae and Pteridophyllaceae. It is assumed that endotestal seed-coat type (I) is most primitive, that exotestal seed coat types (II—VIII) are derived therefrom, and that the reduction of the mechanical layer, including the origin of thin seed-coat type (IX) occurred repeatedly in combination with indehiscent, hard-walled fruits. Dicentra subg. Hedycapnos (with type I) possesses a combination of primitive testal characters unique within the subfamily, suggesting it represents a sister group to the rest of the subfamily. Each of the other subgenera (with II, III or IV) is also characterized by a unique combination of seed-coat characters, which are found in the outgroups but not in the other genera. Seed-coat characters support the monophyly of Fumarioideae exclusive of Dicentra subg. Hedycapnos , Fumarioideae exclusive of Dicentra , of Dicentra subg. Dicentra , of Corydalis p.p. , and of Fumariinae. 相似文献