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华模蛛科——采自中国的蜘蛛目一新科(蛛形纲,蜘蛛目) 总被引：1，自引：0，他引：1
记述了采自我国云南西双版纳雨林的1新科,华模蛛科Sinopimoidae fam.nov.,1新属,华模蛛属Sinopimoa gen.nov.,1新种,双色华模蛛Sinopimoa bicolor sp.nov..模式标本保存在中国科学院动物研究所. 相似文献
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种子萌发和种子大小是植物生活史中的两个关键性特征,它关系到幼苗的建成、存活、竞争和个体未来的适合度。对青藏高原东缘43种灌木（12种优势种,31种常见种）种子的萌发特性、萌发模式以及种子大小对萌发能力的影响进行了比较研究。结果显示,萌发率在80%以上的物种：优势种有3种（鲜卑花、千里香杜鹃和山生柳）,占25%;常见种有1种（白毛银露梅）,占3.23%。萌发率在60%～80%的物种：优势种有1种（中国沙棘）,占8.33%;常见种有12种（红毛杜鹃、蒙古绣线菊、短叶锦鸡儿等）,占38.71%。萌发率在40%～60%的物种：优势种有1种（锥花小檗）,占8.33%;常见种有5种（暴马丁香、密叶锦鸡儿和肋果沙棘等）,占16.13%。萌发率在20%～40%的物种：优势种有2种（烈香杜鹃和小叶金露梅）,占6.45%;常见种有1种（紫丁香）,占3.23%。萌发率在20%以下的物种：优势种有5种（置疑小檗、高山绣线菊和岩生忍冬等）,占41.67%;常见种有12种（甘肃小檗、刚毛忍冬、陕甘花楸等）,占36.36%。优势种和常见种的萌发主要有爆发型、过渡型、缓萌型和低萌型。优势种具有较多的过渡型和缓萌型种,有较少爆发型和低萌型种;常见种中过渡型、缓萌型和低萌型物种比例均在30%左右,爆发型仅有3.32%。优势种中的爆发型要多于常见种,而低萌型的种要少于常见种。萌发率和萌发速率与种子大小呈显著的负相关关系,萌发开始时间和萌发持续时间与种子大小有较弱的关联性。 相似文献
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Savitree Limtong Rungluk Kaewwichian Somjit Am-In Chanita Boonmak Sasitorn Jindamorakot Wichien Yongmanitchai Natana Srisuk Hiroko Kawasaki & Takashi Nakase 《FEMS yeast research》2010,10(1):114-122
Nine strains of three novel anamorphic yeast species were obtained from samples collected in Thailand including six strains (RV96, RV152, R14, RS9, RS58 and EA1) obtained from estuarine waters collected from two mangrove forests, one strain (ST84) from insect frass and two strains (SR16 and UB13) from forest soils. On the basis of morphological, biochemical, physiological and chemotaxonomic characteristics, and the sequence analysis of the D1/D2 domain of the large subunit rRNA gene, the nine strains were found to represent three novel Candida species in the Saturnispora clade. Five strains (RV96, RV152, R14, RS9 and RS58) were assigned as a single novel species, which was named Candida sanitii sp. nov. The type strain is RV152T (BCC 25967T =NBRC 103864T =CBS 10864T ). Strain EA1 was named as Candida suwanaritii sp. nov. The type strain is EA1T (BCC 29900T =NBRC 104877T =CBS 11021T ). Three strains (ST84, SR16 and UB13) represented another novel species, for which Candida sekii sp. nov. is proposed. The type strain is ST84T (BCC 8320T =NBRC 105671T =CBS 10931T ). 相似文献
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The flies of the genus Dicranosepsis from Vietnam were investigated and classified taxonomically. Six new species (D. longa sp. nov., D. kurahashii sp. nov., D. monoseta sp. nov., D. sinuosa sp. nov., D. barbata sp. nov., and D. vietnamensis sp. nov.) are described and illustrated. Dicranosepsis is redefined and a revised key to the species is also provided. 相似文献
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Three isolates belonging to the ascomycetous genus Zygotorulaspora were obtained from the fruits of Cornus officinalis and Smilax china, and flowers of Dendranthema zawadskii var. latilobum in Gongju-si, Korea. Phylogenetic Analyses of the LSU D1/D2 domain and ITS region sequences supported the recognition of two new species: Zygotorulaspora cornina sp. nov. (type strain NIBRFGC000500475 = KACC93346PPP) and Zygotorulaspora smilacis sp. nov. (type strain NIBRFGC000500476 = KACC93347PPP). The two novel species revealed no growth on D-Galactose, unlike the other six species in the genus Zygotorulaspora. They are distinguished from each other by their phylogenetic differences and phenotypic characteristics such as assimilation of xylitol, 5-keto-D-gluconate, and ethanol. All species in the genus Zygotorulaspora including the two novel species have phenotypic traits of genus Zygotorulaspora: asci are persistent, sucrose and raffinose are assimilated, and m-inositol is not required for growth, and they are mainly associated with plants. 相似文献
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DAVID J. HORNE ROBIN J. SMITH JOHN E. WHITTAKER JOHN W. MURRAY 《Zoological Journal of the Linnean Society》2004,142(2):253-288
Terrestricythere elisabethae sp. nov. is described from a semiterrestrial coastal habitat at two sites in Hampshire, southern England. It is the first record of a living population of the genus outside the Far East (north-west Pacific). Based on extensive collections and from observations of cultures, its morphology is described (including a formal definition of the unique 'visordont' hinge), as well as its ontogeny and lifestyle (encompassing habitat, life cycle, mode of life and locomotion). A further new species from Somerset, south-west England is also recorded on the basis of a single specimen but left in open nomenclature. The affinities of the Terrestricytheroidea are discussed in the context of a tentative phylogeny of podocopan Ostracoda. Both carapace and appendage characters are such as to warrant maintaining it as a separate superfamily, which is more closely related to the Cytheroidea and Darwinuloidea than to the Cypridoidea. © 2004 The Linnean Society of London, Zoological Journal of the Linnean Society , 2004, 142 , 253–288. 相似文献
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Among the ballistoconidium-forming yeast strains isolated from various plant leaves collected in North and Northeast China, 12 strains forming orange to orange-red colored colonies were revealed to represent four novel species of the genus Sporobolomyces by conventional, chemotaxonomic and molecular phylogenetic studies, based on the 26S-rDNA D1/D2 domain and internal transcribed spacer (ITS) region sequences. Sporobolomyces beijingensis sp. nov., represented by eight strains (type strain CB 80T = AS 2.2365T = CBS 9730T), and Sporobolomyces jilinensis sp. nov., represented by two strains (type strain CB 118T = AS 2.2301T = CBS 9728T), clustered in the Johnsonii clade of the Sporidiobolus lineage. Sporobolomyces clavatus sp. nov., represented by strain CB 281T (= AS 2.2318T = CBS 9729T), belonged to the Agaricostilbum lineage and showed a close relationship to Sporobolomyces ruber and Sporobolomyces dracophylli. Sporobolomyces symmetricus sp. nov., represented by strain CB 64T(= AS 2.2299T = CBS 9727T), formed nearly symmetrical ballistoconidia and was closely related with Sporobolomyces vermiculatus and Sporobolomyces gracilis in the Gracilis clade of the Erythrobasidium lineage. 相似文献
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Although regeneration of recalcitrant‐seeded tree species can be affected by prolonged drought, especially in Mediterranean regions, little is known about the response of such species to varying site conditions. A field experiment was performed to determine the effect of irrigation and leaf litter cover on seed germination and early seedling survival of the vulnerable recalcitrant‐seeded tree Beilschmiedia miersii (Lauraceae). Two levels of irrigation (non‐irrigated and irrigated units) and three levels of leaf litter depth (0, 5 and 12 cm) were applied to 72 groups of 30 seeds along a wet ravine of the Coastal Range of Central Chile, equally distributed across sites with different levels of canopy cover. Seed germination was significantly increased by irrigation only under closed‐canopy cover, and by leaf litter cover (>5 cm) under all canopy conditions. The effect of leaf litter on germination increased with canopy openness, while the effect of irrigation did not show any tendency. Meanwhile, early seedling survival was significantly increased by irrigation under intermediate canopy cover, and by leaf litter (>5 cm) under closed‐canopy cover. As a result of its overall positive effect on germination, leaf litter should be maintained within B. miersii communities, particularly under intermediate to closed‐canopy conditions, where it can also increase early seedling survival, and both seed germination and early seedling survival might be increased through additional water inputs. The presence of leaf litter might help retaining such inputs, prolonging their effect on regeneration of B. miersii communities. We see this as a baseline assessment of regeneration and persistence that needs further testing on species with similar traits, given the expected increase in the frequency and length of dry periods into the future. 相似文献
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Pseudoneureclipsis lusitanicus Malicky, 1980, is reported from a large tributary of the Loire River, the first record of this genus and species from France. In Europe, this genus was previously known from Portugal. Larval and pupal characters suggest that the genus does not belong to the family Polycentropodidae, as currently classified. 相似文献
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在整理四川省雅安地区采集的麻蝇科标本中,发现潘麻蝇属Pandelleana Rohdendorf,1937一新种,特此描述。模式标本存于沈阳师范学院生物系。 鸵潘麻蝇Pandelleana struthioides,新种(图1—4) 体长:9.5毫米。 雄额约为头宽1/6强,在最狭处间额为一侧额2倍宽,外顶鬃不发达,额鬃约10对,侧额下部不显著向前方突出;侧颜等于或大于触角宽,侧颜鬃一列,同侧额的小毛列相连续,下方的侧颜鬃约等于侧颜宽;芒基部2/3呈长羽状,口上片不突出;颊高约为眼高的1/3,颊后头沟之后的毛为淡黄色,眼后鬃三行;下颚须黑色。 相似文献
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We investigated aspects of germination and seedling establishment that might influence the distribution and diversity of Carex species growing in the forest understory. We tested the ability of Carex communis and C. platyphylla to germinate and establish at plots where adult individuals of one of these two species, or one of two other Carex species (C. backii and C. plantaginea), occurred in an old-growth forest in southern Québec, Canada. We also tested for effects of leaf litter on germination and establishment of these sedges. From a series of experiments in the field and in a lath house, we found no evidence of home-site advantage with respect to germination or seedling establishment. Leaf litter had a negative effect on germination and establishment. The results emphasize the importance of dispersal and colonization events in determining local diversity and distribution of Carex species in upland forests. High frequency of occurrence of C. communis at our study site may result from relatively wide dispersal provided by ants, and a suite of traits associated with ant dispersal in some understory Carex species. 相似文献
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槐尺蠖和银纹夜蛾寄生微孢子虫三新种记述 总被引：4，自引：0，他引：4
本文记述了微孢子虫3新种。槐尺蠖微粒子虫Nosema semiothisae sp. nov.,自然寄主:槐尺蠖Semiothisa cinerearia Bremer & Grey,实验寄主:9种鳞翅目昆虫;银纹夜蛾微粒子虫N. agnatae sp. nov., 自然寄主:银纹夜蛾Argyrogramma agnata(Staudinger),实验寄主:15种鳞翅目昆虫;银纹夜蛾八孢虫Microsporidium argyrogrammi sp. nov., 自然寄主:银纹夜蛾。除描述了它们光镜与电镜形态特征之外,并与近似种比较,作了简短讨论。 相似文献
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