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根据对产于中国的材料的研究,作者认为歧裂灰包属Phellorinia应包括2个种,歧裂灰包P.inquinans和球果歧裂灰包P.strobilina,对这2个种进行了详细描述和显微绘图,并给出了该属种的检索表。 相似文献
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根据对产于中国的材料的研究,作者认为歧裂灰包属Phellorinia应包括2个种,歧裂灰包P.inquinans和球果歧裂灰包P.strobilina,对这2个种进行了详细描述和显微绘图,并给出了该属种的检索表。 相似文献
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作者在研究产于我国的柄灰包目Tulostomatales菌物时,发现采自新疆的2份标本是歧裂灰包科Phelloriniaceae网格歧裂灰包属Dictyocephalos的成员网格歧裂灰包Dictyocephalosattenuatus,该属、种为我国新记录。网格歧裂灰包属DictyocephalosUnderw.exV.S.White,Bull.TorreyBot.Clu 相似文献
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作者在研究产于我国的柄灰包目Tulostomatales菌物时,发现采自新疆的2份标本是歧裂灰包科Phelloriniaceae网格歧裂灰包属Dictyocephalos的成员网格歧裂灰包Dictyocephalos attenuatus,该属、种为我国新记录。 相似文献
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本文报道柄灰包属的两个新种,滴孢柄灰包T. lacrimisporum和糙丝柄灰包T. verrucicapillitium。文中提供了拉丁文描述、英文描述并附图。滴孢柄灰包的主要特征是外包被由菌丝和沙粒所组成,内包被茶褐色,顶孔流苏状至裂片状,菌柄具一菌托,担孢子泪滴状,光镜和电镜下均平滑。糙丝柄灰包的主要特征是外包被由菌丝和沙粒所组成,顶孔圆形、整齐,口围黑灰色,菌柄具球形或鳞茎状的菌丝垫,孢丝隔处膨大,担孢子球圆形,光镜下具疣突和近棱状的突起,电镜下呈由数个柱状物组成的突起或长短不定的棱脊,顶端平截,常相互连接,但不呈网状。模式标本保存于新疆农业大学农学院(原新疆八一农学院)真菌标本室(HMAAC)和中国科学院微生物研究所菌物标本馆(HMAS)。 相似文献
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钉孢属的2个新种和1个新组合生于参薯Dioscoreaalata和毛胶薯蓣Dioscorea
subcalva上的毛胶薯蓣钉孢Passalora dioscoreae-subcalvae,生于薯蓣属Dioscoreasp.上的薯蓣生钉孢Passalora
dioscoreiicola,和生于山麦冬Liriope spicata和沿阶草属Ophiopogon sp.上的麦冬钉孢Passalora
liriopes。研究的标本保存在中国科学院微生物研究所菌物标本馆(HMAS)。 相似文献
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钉孢属的2个新种和1个新组合: 生于参薯Dioscorea alata和毛胶薯蓣 Dioscorea subcalva上的毛胶薯蓣钉孢 Passalora dioscoreae-subcalvae ,生于薯蓣属Dioscorea sp.上的薯蓣生钉孢Passalora dioscoreiicola,和生于山麦冬 Liriope spicata 和沿阶草属 Ophiopogon sp.上的麦冬钉孢 Passalora liriopes。研究的标本保存在中国科学院微生物研究所菌物标本馆 (HMAS)。 相似文献
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贡嘎山是横断山脉海拔最高的一座大山,是研究山地植物多样性和海拔分布的理想地区。为了探讨贡嘎山地区石松类和蕨类植物多样性组成及海拔分布特点,该研究基于野外考察、标本采集鉴定及文献考证,对贡嘎山地区石松类和蕨类植物进行统计和分析。结果表明:(1)贡嘎山地区有石松类植物3科4属25种,蕨类植物有23科56属291种。(2)主要的珍稀濒危植物有6种,分别是高寒水韭(Iso tes hypsophila)、松叶蕨(Psilotum nudum)、桫椤(Alsophila spinulosa)、小叶中国蕨(Aleuritopteris albofusca)、玉龙蕨(Polystichum glaciale)和扇蕨(Lepisorus palmatopedatus)。(3)优势科为鳞毛蕨科(Dryopteridaceae)75种、水龙骨科(Polypodiaceae)56种、凤尾蕨科(Pteridaceae)54种和蹄盖蕨科(Athyriaceae)37种;优势属为耳蕨属(Polystichum)45种、鳞毛蕨属(Dryopteris)24种、蹄盖蕨属(Athyrium)24种和瓦韦属(Lepisorus)19种。(4)区系以温带成分为主,有286种(93.77%)。随着海拔的上升,石松类和蕨类的物种多样性逐渐增加,2000~3000 m海拔段的物种多样性最高,为20科46属192种,3000 m以上物种多样性逐渐下降,4500 m以上仅分布有4种蕨类植物。此外,该研究还发现,随着海拔的升高,中国-喜马拉雅成分逐渐增加。 相似文献
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《Mycoscience》2014,55(3):196-212
The Longibrachiatum Clade of the genus Trichoderma in Japan was examined, among which two new species and three new records are herewith reported. The new species, T. tsugarense and T. kunigamense were isolated from a bed log (cultivation of Lentinula edodes) and volcanic ash soil, respectively. These species are distinguished from closely related species by growth and morphological characteristics and in phylogenetic analysis. Additional species new to Japan were T. ghanense, T. parareesei and T. sinense. The significance of their distribution is discussed. Most species of the Longibrachiatum Clade are tropical rather than temperate in distribution. Their in vitro optimum growth tends to be >35 °C but the optimum temperature for some Japanese species was lower. Some species are endophytes of temperate plant species, some of which are endemic in Japan. 相似文献
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Abstract: The status of thirty four species of the cytheroidean ostracod family Cytheruridae from the Neuquén Basin, west-central Argentina is reviewed. These species belong to the following nine genera: Eucytherura Müller, ranging in this study from Pliensbachian to Valanginian and represented by fourteen species; Kangarina Coryell and Fields, Aalenian–Bajocian, with a single species; Acrocythere Neale, Hauterivian, one species; Paranotacythere Bassiouni, Berriasian, two species; Procytherura Whatley, Pliensbachian to Hauterivian, twelve species; Cytheropteron Sars, Aalenian–Bajocian, one species: Eocytheropteron Alexander, Hauterivian, one species; Paradoxorhyncha Chapman, Aalenian–Bajocian, one species; and Paracytheridea Müller, Berriasian, one species. Of the three subfamilies of the Cytheruridae, the Cytherurinae, with thirty species are by far the most numerous and abundant throughout the study. The other two subfamilies, the Cytheropterinae are represented by three species and the Paracytherideinae by a single species of the nominative genus. Several of the species are very widely distributed geographically and have, for example, also been recorded from Europe; others indicate close links with South Africa and Australia. The stratigraphical ranges of certain genera have been extended as a result of this study. For example, Kangarina has not previously been recorded below the Cretaceous. The Cytheruridae are clearly the most diverse cytheroidean ostracodes in the Mesozoic of the Neuquén Basin and are more diverse than all other groups of ostracodes combined. Four new species, Eucytherura tessae , Eucytherura yunga , Procytherura amygdala and Eocytheropteron immodicus are described. Eucytherura guillaumeae nom. nov. for Eucytherura tuberculata Brenner and Oertli and Eucytherura paranuda nom. nov. for Eucytherura nuda (Brand) are proposed. 相似文献
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The Epacridaceae of Western Australia comprise 181 named speciesdistributed in 17 genera. One hundred and seventy seven species(98% of the total) and ten genera are endemic to the region.within Western Australia, all members are confined to the south,with a bimodal pattern of species diversity centred on the sandplainsand uplands around the Stirling Ranges and Mount Lesueur.Leucopogon, the largest genus, reflects this pattern, however, speciesdiversity is greatest on the south coastal sandplains. All species are woody shrubs, mostly found on neutral or acidicsandy soils. Plants of at least 120 species are killed by fire;Astrolomacontainsthe only significant number of resprouting species. Althoughsome species are in flower every month every year, autumn/winterflowering is a common feature of many members of the family.All species are biotically pollinated. Bird pollination is foundin 18 species in six genera. The remaining species are insectpollinated. Bees are the major pollinators inLeucopogon, ConostephiumandColeanthera.Moths and butterflies are important pollinators inAndersonia,Leucopogon,LysinemaandStyphelia. Flies are minor pollinators of some speciesofAndersonia, LeucopogonandMonotoca. All species studied areprotandrous and outbreeding, with onlyCosmeliabeing capableof self pollination. Fruits are fleshy inAstroloma, Brachyloma,Croninia, in certain species ofLeucopogonandStypheliaand areanimal dispersed. Other genera have dry, dehiscent fruit withgravity or wind dispersed seeds. Many species have relatively narrow distribution ranges, 90species having ranges of over 300km, 54 species have rangesof 100300km and 37 have ranges of less than 100km (andthere are many undescribed species in this group). The conservationstatus of many species is still poorly known. Dieback diseaseis a major threat to the family, and could cause the extinctionof several species in the wild. Western Australia; Epacridaceae; phytogeography; biology; pollination; dispersal; conservation; disease 相似文献
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Björn‐Axel Beier 《分类学与生物多样性》2013,11(3):221-263
The taxonomy of the desert shrub genus Fagonia is revised in detail. In total 167 names are accounted for, lectotypes are selected for 33 names, and two names are neotypified. A key to the 34 species is presented, as well as distribution maps for each species. Three new species are described and illustrated, F. densispina and F. latistipulata from Somalia, and F. hadramautica from Yemen. Of the accepted species, 24 are restricted to the Old World and eight to the New World. Most of the Old World species are confined to the Saharo‐Sindian region, with two extending to parts of Macaronesia. Eight species are endemic to the Somali‐Masai region, and two are restricted to southern Africa. In the New World four species are endemic to Baja California, two to northern Baja California and adjacent parts of southwestern USA, one to the province of Coahuila in northeastern Mexico, and one to Chile and Peru. The names of all four species of Fagonia currently on the IUCN Red List of Threatened Plants are put into synonymy. 相似文献
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A study of freeliving freshwater Cyclopoida of Malaysia and Singapore yielded 15 species. Some remarks are made on the morphology
including a species belonging to the schmeili group of Thermocyclops. Shallow and vegetation-bearing habitats had the largest numbers of species. Most of the species are cosmopolitan. The three
common species, Mesocyclops leuckarti, Thermocyclops crassus and Microcyclops varicans are eurytopic. M. leuckarti and T. crassus are the only species occurring commonly in limnetic situations in contrast to a much wider limnetic Cyclopoida species spectrum
in temperate lakes. There appears to be a reduction in Cyclopoida from temperate to tropical latitudes, but the data on which
this are based are at present fragmentary. 相似文献
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Freshwater aquatic organisms in North America are disproportionately imperilled when compared to their terrestrial counterparts
due to widespread habitat alteration, pollution, overexploitation and the introduction of alien species. In this review, we
examine the threat factors contributing to the endangerment of freshwater fishes and molluscs in Canada and further examine
the nature of alien invasive species introductions affecting aquatic species at risk. Habitat loss and degradation is the
predominant threat factor for Canadian freshwater fishes and molluscs that are listed as Extinct, Extirpated, Endangered
and Threatened. Alien invasive species are the second most prevalent threat for fishes, affecting 26 of 41 listed species.
Alien invasive species are a threat in most parts of Canada where listed fishes are found. Most (65%) of the alien invasive
species affecting listed fishes are the result of intentional introductions related to sport fishing, and the majority of
these introductions are unauthorized. Fifteen fishes and two plant species are cited as alien invasive species that impact
listed fishes with brown bullhead (Ameiurus nebulosus) and pumpkinseed (Lepomis gibbosus) being the most prevalent. Alien species are a threat to 6 of 11 listed mollusc species. All six species are threatened by
the alien zebra mussel (Dreissena polymorpha) in the Great Lakes basin.
An erratum to this article is available at . 相似文献
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中国千斤拔属植物的初步研究 总被引:7,自引:0,他引:7
本文叙述了千斤拔属名的拉丁学名的变换和研究情况,并研究该属植物国产种的分类、地理分布及其特点。进而对该属植物的习性和苞片、花序、花和叶等诸器官演化趋势作初步探讨,并对该属6个类群之间可能的演化关系、属的起源、分布中心和迁移路线等问题提出初设想。 相似文献