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1.
    
The misapplication of the name Pternopetalum molle (Franch.) Hand.‐Mazz. has resulted in considerable taxonomic confusion in the genus, involving 11 names belonging to seven taxa (according to a recent treatment). A supplementary taxonomic revision of P. botrychioides (Dunn) Hand.‐Mazz., P. molle and P. vulgare (Dunn) Hand.‐Mazz. is presented, after a detailed examination of the morphological variation. Four new synonyms, P. longicaule var. humile R.H.Shan & F.T.Pu, P. molle var. dissectum R.H.Shan & F.T.Pu, P. radiatum (W.W.Smith) P.K.Mukherjee and P. trifoliatum R.H.Shan & F.T.Pu, are proposed. Pternopetalum delicatulum (H.Wolff) Hand.‐Mazz. should be reduced to P. botrychioides rather than P. radiatum. The previous taxonomic treatments of P. cuneifolium (H. Wolff) Hand.‐Mazz., P. cartilagineum C.Y.Wu ex R.H.Shan & F.T.Pu and P. molle var. crenulatum R.H.Shan & F.T.Pu are reinstated. A key and distribution maps are provided for the accepted species. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 158 , 274–295.  相似文献   

2.
    
The taxonomy of the South-east Asian catfish genus Acrochordonichthys (Akysidae) is revised.The shapes of the snout, humeral process and adipose fins are diagnostic species characters. Only four out of 11 species and one sub-species described prior to this study are considered valid, namely A. rugosus (Bleeker, 1847), A. ischnosoma Bleeker, 1858, A. chamaeleon (Vaillant, 1902), and A. pachyderma Vaillant, 1902. An additional five new species ( A. guttatus, A. septentrionalis, A. mahakamensis, A. strigosus and A. falcifer ) are described.  相似文献   

3.
The binturong Arctictis binturong is a threatened carnivore (Mammalia) that ranges throughout the forests of South-east Asia. This study evaluates the genetic diversity of captive binturong populations in European zoos and attempts to assess their geographic origin. We sequenced the hypervariable region 1 of the mitochondrial control region of 56 binturongs, among which 20 had a known geographic origin. We showed that at least two distinct geographic clades exist and were able to assess the geographic clade to which captive individuals belong. Moreover, a low genetic diversity was observed among the captive population of European zoos. Although our results are preliminary, zoo managers should consider the evolutionary significant units identified by this study, and which correspond to recognized sub-species, when planning binturong reproduction programs.  相似文献   

4.
The identities of the nominal species in the Ompok hypophthalmus group of silurid catfishes, namely Ompok hypophthalmus , O. macronema and O. urbaini are verified in this study. Ompok macronema is hypothesized to be a junior synonym of O. hypophthalmus , and O. urbaini (previously considered a junior synonym of O. hypophthalmus ) is hypothesized to be valid, distinct species. Ompok hypophthalmus is restricted to Java and the Barito River drainage in southern Borneo, and the material previously identified as O. hypophthalmus from Sumatra, the Malay Peninsula and Borneo represents O. rhadinurus , a new species.  相似文献   

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SEALY, J. R, 1983. A revision of the genus Nomocharis Franchet. A taxonomic revision of the genus Nomocharis Franchet is presented, recognizing seven species. Notes are given on the species and hybrids in cultivation. A key for identification of the species and an index to specific epithets, including synonyms, are given, together with species excluded from the genus. Herbarium specimens are cited.  相似文献   

7.
在标本室研究和野外考察的基础上,对中国细柄茅属Ptilagrostis Griseb.几个类群进行了分类修订。双叉细柄茅P. dichotoma Keng ex Tzvelev和窄穗细柄茅P. junatovii Grub.分别被归并到细柄茅P. mongholica (Turcz. ex Trin.)和太白细柄茅P. concinna (Hook. f.) Roshev.中作异名;小花细柄茅P. dichotoma Keng ex Tzvelev var. roshevitsiana Tzvelev则被提升为种P. roshevitsiana (Tzvelev) L. B. Cai。  相似文献   

8.
四川乌头属的修订   总被引:4,自引:0,他引:4  
四川是我国乌头属Aconitum L.植物的重要分布区。本文对该地区的乌头属植物进行了分类修订。通过文献查阅、野外观察和标本室研究,对乌头属的形态性状在居群间和居群内的变异式样进行了比较分析,发现叶分裂程度、上萼片的形状和花梗毛被等性状是较为可靠的分种依据,但是在个别情况,这些性状也会在同一种的同一居群内或不同居群间发生变化。花瓣和种子的特征对于属下划分有重要意义。本文承认四川乌头属植物有46种11变种,另有2种和1变种暂存疑。29种和22变种降为异名;作出新组合2个,其中包括1个改级新组合。紫乌头A. delavayi Franch.和保山乌头A. nagarum Stapf为四川新分布记录。对康定乌头A. tatsienense Finet &; Gagnep.、川鄂乌头A. henryi Pritz.和狭裂乌头A. refractum (Finet &; Gagnep.) Hand.-Mazz.进行了后选模式的标定。初步澄清了东俄洛乌头A. tongolense Ulbr.和狭裂乌头等种类中长期存在的名实混乱。还给出了各个种的形态描述、地理分布以及分亚属、分系和分种检索表。  相似文献   

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在标本观察和野外调查的基础上,对细莴苣属Stenoseris植物进行了分类学修订,共确认了3种.有3个名称,即Stenoseris leptanthaShih,S.taliensis(Franch.)Shih和S.tenuisShih处理为新异名.此外,重新编制了细莴苣属分种检索表,并较为详细地记录了每种的分布地点.  相似文献   

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蓑藓属(Macromitrium Brid.)是藓类植物中分类最困难的类群之一。先后该属记录946个种,现接受351个种。目前中美洲、亚洲、澳大利亚、新西兰等地区的蓑藓属植物基本完成了分类修订,而南美洲、非洲中部、马达加斯加等地区的蓑藓属植物尚未进行系统的分类修订。蓑藓属的属下分类系统问题众多,先后在该属下建立了10个亚属、20个组和2个亚组,目前接受的有4个亚属和8个组,但是这些类群之间的分类地位和关系仍然不清。鉴于蓑藓属种数多,种间分类问题多,分布广泛,需要开展国际间的合作才能够解决世界蓑藓属的分类修订和系统学研究。  相似文献   

13.
基于文献考证和标本研究,将宁德冬青(Ilex ningdeensis C. J. Tseng)修订为乌来冬青(I. uraiensis Yamamoto)的异名,并对南平冬青(I. nanpingensis G. S. He)的分类学地位进行讨论。  相似文献   

14.
对毛茛科Ranunculaceae铁线莲属Clematis的菝葜叶铁线莲组sect. Naraveliopsis进行了全面修订, 确定此组共含21种1亚种和1变种; 写出此组的分类学简史和地理分布, 并讨论了此组在铁线莲属中的系统位置; 将此组划分为3亚组, 写出分亚组、分种检索表, 以及各种植物的形态描述、地理分布、生长环境等, 并附有多数种的墨线图。根据对此组植物形态特征的分析, 观察到以下重要演化趋势: (1)叶从单叶演变到二回羽状复叶或二回三出复叶; (2)花从两性到单性, 从无退化雄蕊到有退化雄蕊; (3)雄蕊从无毛到有毛; (4)药隔突起从短(0.5-0.7 mm)到长(8.5-10 mm)。根据上述演化趋势,花两性、雄蕊被毛、退化雄蕊存在的荔波铁线莲亚组subsect. Liboenses(1种,特产贵州荔波)和花由两性变为单性的亚组subsect. Macgregorianae(2种,特产菲律宾)被认为是菝葜叶铁线莲组的进化群。在原始的菝葜叶铁线莲亚组subsect. Smilacifoliae(花两性,雄蕊无毛; 18种,广布亚洲热带地区)中,具单叶,花无退化雄蕊,药隔突起较短的菝葜叶铁线莲C. smilacifolia和滇南铁线莲C. fulvicoma被认为是较原始的种,而具三出复叶和退化雄蕊的C. vietnamensis和丝铁线莲C. loureiriana,以及具羽状复叶和长药隔突起(长达10 mm)的C. papillosa等3种则被认为是此亚组的进化种。自中南半岛北部山地向西经云贵高原南部至喜马拉雅东部山区集中分布有菝葜叶铁线莲组的13种植物,这一山区地带被认为是此组的分布中心。在此山区地带中,菝葜叶铁线莲的分布区和滇南铁线莲的分布区重叠部分的山区可能是此组的起源中心。  相似文献   

15.
铁线莲属茴芹铁线莲组修订   总被引:3,自引:1,他引:3  
对毛茛科铁线莲属Clematis L.的茴芹铁线莲组sect.Pseudanemone进行了分类学修订,确定此组包含约16种、3亚种和2变种;写出了此组的分类学简史和地理分布,讨论了此组在铁线莲属的系统位置;将此组划分为3系,写出了分系、分种检索表,以及各种植物的形态描述、地理分布、生长环境等,并附有多幅插图。(2)本组植物的花具4枚平展的萼片,雄蕊花丝条形,被柔毛。在铁线莲属中,这样的花构造与对枝铁线莲组sect.Brachiatae的花较为相似。但本组植物为直立的亚灌木或小灌木,萼片常部分镊合状排列,部分覆瓦状排列,通常呈卵形或宽卵形,内面常密被短柔毛或短绒毛,雄蕊花药通常条形,较长,常长达5-9.5mm。因为具有这些较为特化的特征,此组遂比对枝铁线莲组为进化(在对枝铁线莲组,所有的种均为木质藤本植物,萼片4枚镊合状排列,通常呈长圆形,内面常被短柔毛,但不被短绒毛,雄蕊花药通常长圆形,较短,长1-3mm),可能由后者演化而来,因此,茴芹铁线莲组和对枝铁线莲组一样,也是属于铁线莲属中欧洲铁线莲演化干的一个成员。(3)如前所述,本组的萼片常部分镊合状排列,部分覆瓦状排列。在铁线莲属中,绣球藤组sect.Cheiropsis特产日本的单型亚组subsect.Williamsianae和单性铁线莲组sect.Aspidanthera特产新西兰的亚组subsect.Hexapetalae的萼片卷叠式也有类似情况,这说明在铁线莲属中不同演化干上出现的部分萼片呈覆瓦状排列的情况应当是次生的,而不是原初的现象。(4)根据萼片的毛被和花药的长度,本组被划分为3系:第1系,茴芹铁线莲系ser.Pimpinellifoliae,是本组的原始群,含7种,特产马达加斯加中亚山区,其特征为萼片薄纸质,内面无毛或多少疏被短柔毛,花药条形或狭长圆形,长2.2-4mm。第2系,绒毛铁线莲系ser.Villosae,含3种,特产非洲大陆中部及南部,其特征为萼片常较厚,呈纸质或亚革质,内面密被短绒毛或密短柔毛,花药通常条形,有时狭长圆形,长2.5-4(-5)mm。第3系,黄果铁线莲系ser.Chrysocarpae,含6种,特产非洲大陆中部之南,其特征为萼片较厚,呈纸质或亚革质,内面通常被密短柔毛或短绒毛,只1种无毛,花药条形,在多数种长5.8-7mm,在特产扎伊尔南部的C.katangensis则长8-9.5mm,是茴芹铁线莲组中最长的花药。  相似文献   

16.
对内蒙古、宁夏、甘肃等荒漠和半荒漠地区的气候和其他一些因素所导致的阿拉善黄耆(Astragalus grubovii Sancz.)的多态现象和变异规律进行了分析,对其存在的分类问题予以订正,将长期以来混乱不清的8个名称处理为异名,为阿拉善黄耆种的界定提供分类学依据.  相似文献   

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  总被引:1,自引:0,他引:1  
The taxonomy of the genus Paeonia in the Caucasus has been controversial, with recognized species varying in number from one to 13. The taxonomic history of Paeonia in this area is reviewed (including an analysis of the characters used by previous authors) based on extensive field observations, population sampling and critical examination of a large number of herbarium specimens. The results show that Paeonia may be divided into three groups. The P. intermedia group is known from only a single population. In the P. tenuifolia group, all the characters used for distinguishing the three previously recognized species were found to be polymorphic. In the P. daurica group, petal colour, shape and size of leaflets, and indumentum of leaflets and carpels were used to distinguish nine species, but these characters were found to be polymorphic or continuous in variation, and thus can only be used for infraspecific classification. Thus, three species are recognized: P. intermedia , P. tenuifolia and P. daurica . The last species is further divided into five subspecies: sspp. coriifolia , wittmanniana , mlokosewitschii , macrophylla and tomentosa stat. nov .  © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 143 , 135–150.  相似文献   

19.
王文采   《广西植物》2007,27(1):1-28
(1)对毛莨科铁线莲属Clematis的铁线莲组sect.Viticella进行了分类学修订,确定此组包含13种,1亚种和2变种(包括2新种和1新变种等级),写出此组的分类学简史和地理分布;将此组划分为3亚组,4系,写出区分组下各级分类群的检索表,以及各种植物的形态描述,地理分布,生长环境等,并附有多幅插图。(2)特产我国东部的单型毛萼铁线莲亚组subsect.Hancockianae(花具4枚平展,不展宽的萼片,雄蕊无毛)被认为此组的原始群。铁线莲亚组subsect.Floridae(花具5-8枚平展,强烈展宽的萼片,雄蕊无毛,花粉具散孔)和湖州铁线莲亚组subsect.Viticellae(花具4枚渐升,多少展宽的萼片,雄蕊花丝常被缘毛,花粉具3沟)可能均由毛萼铁线莲亚组衍生而出。(3)在我国东部集中分布此组的3亚组,3系的8种,1亚种和1变种,这里是此组的分布中心,也可能是此组的起源中心。  相似文献   

20.
    
An important function of song production by male crickets is to attract conspecific females. These sound signals can be used to infer species boundaries as they can provide indirect evidence for reproductive isolation. However, many studies of orthopteran diversity in South-east Asia are based mainly on morphology and only occasionally acoustics. As such, there is a lack of information on how acoustic data can be congruent with morphological data when used to delineate species. Crickets of the genus Gymnogryllus (Grylloidea, Gryllidae), are such an example. Gymnogryllus are relatively speciose, but their calling songs have not been studied. We collected specimens and calling songs of five Gymnogryllus species from South-east Asia. The acoustic parameters of the calls, along with male tegminal venation and morphology genitalia, were compared. All data types showed congruency in distinguishing G. sylvestris and G. leucostictus from each other and from the other species. Inferring species boundaries for G. angustus, G. malayanus, and G. unexpectus using acoustics and tegminal morphometry proves to be more challenging. While acoustics, tegminal morphometry, and genital morphology are likely to be useful for inferring species of Gymnogryllus from different species groups, greater coverage of taxa is needed to resolve taxonomy of closely related Gymnogryllus.  相似文献   

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