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1.
The Turkish Crataegus taxa were investigated using morphological, palynological, and anatomical characters. A new series ( Crataegus Section Crataegus Series Peshmenia ), two new species ( Crataegus peshmenii and Crataegus christensenii ), and one variety ( Crataegus rhipidophylla var. kutahyaensis ) are described. Furthermore, Crataegus  ×  browicziana has been assigned to Crataegus rhipidophylla with a new status. Illustrations of the described taxa and their distribution map are also given. The lectotype for Crataegus yaltirikii is designated here.  © 2007 The Linnean Society of London, Botanical Journal of the Linnean Society , 2007, 155 , 231–240.  相似文献   

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The genus Dendrokingstonia (Annonaceae) is taxonomically revised and palynologically studied. Three species are recognized, one of which, D. gardneri , is described as new to science. One new combination, D. acuminata , is made. The genus occurs from southern Thailand to Peninsular Malaysia and Sumatra. On the basis of macromorphology and pollen characters, it is considered to be related to Monocarpia. Both genera show a combination of macromorphological characters that is rare in the family, i.e. considerably enlarged stigmas, leaves with percurrent tertiary veins, a highly reduced number of carpels per flower and relatively large monocarps with a thick, hard wall. Scanning and transmission electron microscopy show that the pollen grains of Dendrokingstonia and Monocarpia are monosulcate monads with a columellate infratectum and a more or less bulging intine at the sulcus. © 2011 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 168 , 76–90.  相似文献   

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A survey of the genus Sorbaria (Rosaceae)   总被引:1,自引:0,他引:1  
A taxonomic revision of the Asiatic genus Sorbaria (Rosaceae). 4 species are recognized: S. sorbifolia (including S. stellipila), S. grandiflora (= S. pallasii incl. S. rhoifolia), S. kirilowii,(incl. S. arborea and S. assurgens ) and S. tomentosa (= S. lindleyana , incl. S. olgae and S. gilgitensis ) with var. angustifolia , comb. nov. (= S. aitchisonii ). Hybrids presumably between S. sorbifolia and S. grandiflora and S. sorbifolia and S. kirilowii are found cultivated.  相似文献   

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Two new species, Dicoma gillettii and Dicoma scoparia (Asteraceae), both from Somalia, are described and illustrated. The differences between the new species and related taxa are listed.  相似文献   

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张爱环  李后魂 《昆虫学报》2004,47(4):485-489
本文对连小卷蛾属Nuntiella Kuznetsov进行了系统研究,共记述三个种研究,其中有两个新种:阔端连小卷蛾Nuntiella laticuculla sp. Nov.和狭翅连小卷蛾Nuntiella angustiptera sp. Nov.。首次描述了连小卷蛾属的雌性外生殖器特征。文中提供了成虫和外生殖器特征图及分种检索表。模式标本保存在南开大学生物系。  相似文献   

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This study provides pollen data for 38 representative taxa belonging to all nine genera in the current classification of the tribe Spiraeeae (Rosaceae) including the monotypic Korean endemic genus Pentactina, and considers the distribution of orbicules for the first time. Pollen morphology and wall stratification were investigated using light, scanning electron and transmission electron microscopy. Spiraeeae pollen grains are small to medium in size (P = 6.9–34.0 μm, E = 7.1–28.0 μm), oblate to prolate in shape (P/E = 0.66–1.48) and tri-colporate. Spiraeeae pollen is generally characterised by striate sexine ornamentation, but four ornamentation types are recognised based on the length and direction of the ridge patterns. The observed variation in sexine ornamentation is particularly valuable at the generic level. The exine stratification of the representative Spiraeeae studied is similar and characterised by unbranched columellae and a continuous endexine. Orbicules are present in three genera of the tribe (Luetkea, Sibiraea and Xerospiraea). Orbicule distribution patterns indicate that the absence of orbicules is a synapomorphic condition of the more derived clade, comprising Pentactina + Petrophytum + Kelseya + Spiraea.  相似文献   

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WANNAN, B. S. & QUINN, C. J., 1992. Inflorescence structure and affinities of Laurophyllus (Anacardiaceae). The inflorescence structure, pollen and floral anatomy are investigated in Laurophyllus . The inflorescence is a panicle sensu Briggs & Johnson, but with marked differences between the male and female. Sistergroup comparison with the Burseraceae indicates that the plesiomorphic inflorescence in the Anacardiaceae is a thyrsoid, the apomorph being the panicle. Laurophyllus has Rhus -type pollen and therefore has no close affinity with Dobinea or Campylopeialum . Floral anatomy reveals that Laurophyllus is unicarpellary with a dorsally attached style and an apically attached ovule. These characters suggest that rather than being related to Anacardium or Mangifera , it has some affinity with Blepharocarya or perhaps with one of the poorly known African or Madagascan genera.  相似文献   

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A revision of the genus Trixa Meigen (Diptera: Tachinidae)   总被引:1,自引:0,他引:1  
The genus Trixa Meigen, 1824 is revised. Dexiotrix Villeneuve, 1936 and Trixella Mesnil, 1980, each of which was sometimes treated as a distinct genus, are treated as junior synonyms of Trixa Meigen. Two species from Sichuan and Yunnan, China, are described as new to science, viz. Trixa chinensis sp. nov. and T. chaoi sp. nov. T. alpina Meigen is treated as a junior synonym of T. caerulescens Meigen. T. nox (Shima) and T.pubiseta (Mesnil) are newly recorded from China. Males of T. pubiseta (Mesnil) and T.longipensis (Villeneuve) are described for the first time. Diagnoses, figures and a key to twelve species in Trixa are given.  相似文献   

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果皮和种皮微形态特征在杜鹃花属系统学研究中的应用   总被引:12,自引:0,他引:12  
采用扫描电子显微镜对国产杜鹃花属Rhododendron6个亚属的代表种和近缘类群杜香属Ledum杜香L.palustre的果皮和种皮微形态特征进行观察,对杜鹃花属植物果皮微形态特征进行了系统描述,并通过比较现存杜鹃花属植物和种子化石,新发现一些居间的种子类型。结果表明,果皮和种皮微形态特征具有一定的系统学意义。叶状苞亚属subgen.Therorhodion的叶状苞杜鹃R.redowskianum的果实有短而疏的刺毛,无气孔,种子为无翅类,扁平,外围轮廓长椭圆形。杜鹃亚属subgen.Rhododendron植物果皮为百合花杜鹃型,具有鳞片,气孔器散生于指状突起之间,与叶表皮的微形态特征一致,其种子为百合花杜鹃型,表面具宽而浅的沟,呈脑纹状,有别于无鳞类杜鹃花。常绿杜鹃亚属subgen.Hymenanthes果皮为云锦杜鹃型,其角质层表面不规则,无表皮毛,偶见气孔;种子为云锦杜鹃型。映山红亚属subgen.Tsutsusi果皮为岭南杜鹃型,密生长表皮毛,角质层致密;种子为南边杜鹃型和岭南杜鹃型。微形态特征与“常绿杜鹃亚属和(国产)映山红亚属均为内部支持率很高的单系类群”的分子系统发育研究结果一致。马银花亚属subgen.Azaleastrum的马银花组sect.Azaleastrum和长蕊杜鹃组sect.Choniastrum微形态区别明显,支持各自为独立的单系类群。羊踯躅亚属subgen.Pentanthera的羊踯躅R.molle果皮特征明显,可与其他亚属区分,但种子类型更接近常绿杜鹃亚属。本研究结合分子系统发育资料和叶表皮微形态特征讨论了一些近缘类群的系统发育关系;研究结果支持将腺萼马银花处理为独立的种。  相似文献   

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The genus Sige Malmgren, 1865 is revised and the type species S.fusigera Malmgren, 1865, redescribed from syntypes and newly collected topotype material. Based on examination of type specimens, six species described from other genera are transferred to Sige: Pirakia brunnea Fauchald, 1972; Vitiazia dogieli Ushakov, 1953; Eulalia longocirrata Stop-Bowitz, 1948; Eumida (Eumidaj parvicirrus Perkins, 1984; Eulalia sandwichensis Ushakov, 1975; Eulalia sigeformis Annekova, 1937. The genus Vitiazia Ushakov, 1953, being monotypic, becomes a junior synonym to Sige. Pirakia lanceolata Hartman & Fauchald, 1971 is synonymized with Sige longocirrata (Støp-Bowitz, 1948) and Sige oliveri sp. nov. is described from western Norway and Sweden. Ten species are recognized as belonging to Sige. The relationships of Sige to other genera are discussed.  相似文献   

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中国多刺蚁属驼背亚属系统分类研究(膜翅目:蚁科)   总被引:1,自引:0,他引:1  
徐正会 《昆虫学报》2002,45(4):522-530
记述了在云南省南部西双版纳自然保护区热带雨林区域采集到的多刺蚁属Polyrhachis Smith驼背亚属Cyrtomyrma Forel 5新种:方肩多刺蚁P. (C.) cornihumera sp. Nov.,齿肩多刺蚁P. (C.) dentihumera sp. Nov.,圆肩多刺蚁P. (C.) orbihumera sp. Nov.,圆顶多刺蚁P. (C.) rotoccipita sp. Nov.,短胸多刺蚁P. (C.) brevicorpa sp. Nov.。目前为止在中国和中南半岛记载该亚属13种,其中中国已知9种。提供了中国和中南半岛已知13种的检索表。  相似文献   

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The genus Sige Malmgren, 1865 is revised and the type species S.fusigera Malmgren, 1865, redescribed from syntypes and newly collected topotype material. Based on examination of type specimens, six species described from other genera are transferred to Sige: Pirakia brunnea Fauchald, 1972; Vitiazia dogieli Ushakov, 1953; Eulalia longocirrata Stop-Bowitz, 1948; Eumida (Eumidaj parvicirrus Perkins, 1984; Eulalia sandwichensis Ushakov, 1975; Eulalia sigeformis Annekova, 1937. The genus Vitiazia Ushakov, 1953, being monotypic, becomes a junior synonym to Sige. Pirakia lanceolata Hartman & Fauchald, 1971 is synonymized with Sige longocirrata (Støp-Bowitz, 1948) and Sige oliveri sp. nov. is described from western Norway and Sweden. Ten species are recognized as belonging to Sige . The relationships of Sige to other genera are discussed.  相似文献   

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The diagnosis of the genus Labidochromis is revised to include species with bicuspid outer teeth. Sixteen species, of which 13 are new, are described and illustrated and the validity of five others is discussed. The interrelationships between members of the genus and the relationship of the genus to other genera are discussed. No clearly defined sister group to the genus has been found either within or outside the Lake Malawi cichlid species flock. A key based on the coloration of known species is included.  相似文献   

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系统研究报道了中国斑织蛾属Ripeacma 11个种,其中有4个新种:角斑织蛾Ripeacma trigonia Wang et Li, sp. Nov.,叉斑织蛾Ripeacma bicruris Wang et Li, sp. Nov.,疣斑织蛾Ripeacma verruculosa Wang et Li, sp. Nov.和带斑织蛾 Ripeacma latizona Wang et Li, sp. Nov.。提供了该属中国已知种的检索表,绘制了新种的外生殖器特征图。模式标本保存在南开大学生物学系。  相似文献   

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