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The taxonomic significance of leaf micromorphology in the genus Eugenia L. (Myrtaceae) 总被引:1,自引:0,他引:1
NOORMA WATI HARON DAVID M. MOORE 《Botanical journal of the Linnean Society. Linnean Society of London》1996,120(3):265-277
Leaf micromorphological features of both the Old and New World representatives of Eugenia L. have been studied by light microscopy and scanning electron microscopy. The leaves are hypostomatic and, in the majority of species, the stomata are raised above the epidermis. Trichomes are usually present on the abaxial surface of the New World species. The patterns of abaxial surface sculpturing and arrangement of outer stomatal rims are unique in the New World species. The majority of the Old W'orld species showed different anticlinal wall patterns on the adaxial and abaxial epidermises. In the majority of the New World species the anticlinal wall patterns are more or less the same except in E. axillaris. The paracytic type of stomata, with a non-prominent T-piece cutinization at the poles of the guard cells, is a characteristic feature of the New World species. The taxonomic significance of these features in identification and elucidation of species from both areas is discussed. 相似文献
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中国柯蚱属分类研究(直翅目: 蚱科) 总被引:8,自引:0,他引:8
整理记述分布于我国的柯蚱属种类共12种, 其中有2新种, 即龙滩柯蚱Coptotettix longtanensis sp. Nov. 及断脊柯蚱C. rupticosta sp. Nov.; 将断隆线柯蚱C. interrupta Zheng et Mao 转入庭蚱属Hedotettix; 贡柯蚱C. fugongensis Zheng et Mao 被确认为龙江柯蚱C. longjiangensis heng et Wei 的同物异名。模式标本保存于陕西师范大学动物研究所标本室。 相似文献
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本文对中国似织螽属已知种类进行了研究,并列出了该属已知种的检索表, 同时记述一新种,即宽翅似织螽 Hexacentrus expansus sp. nov.。该新种与H. inflatissimus Gorochov & Warcholowska-Sliwa, 1999 和H. yunnaneus Bey-Bienko, 1962相似,与前者的主要区别: 1)体明显较小; 2)雄性左前翅Cu2脉较长且直; 3)雄性前翅Rs脉从R脉近端部分出; 4)雌性翅狭,不到达产卵瓣端部; 与后者的主要区别: 1)体黄绿色,跗节第3、4节黑色; 2)雄性左前翅Cu2脉粗壮; 3)雄性前翅Rs脉从R脉近端部分出,基部稍弯曲; 4)雄性腹突细长,长于下生殖板的1/2。模式标本保存于河北大学博物馆。 相似文献
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Tetsuo Koyama 《Brittonia》1984,36(2):184-205
Heterosmilax, a small southeastern Asiatic genus in the Smilacaceae, comprises 11 species in two sections, includingH. micrandra, which is described as new from Hainan, China. These taxa are taxonomically discussed, described, illustrated, and a key is provided to differentiate them. 相似文献
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A. E. VAN WYK P. J. ROBBERTSE P. D. F. KOK 《Botanical journal of the Linnean Society. Linnean Society of London》1982,84(1):41-56
The mature stomatal morphology of 11 southern African species of Eugenia , and also of E. uniflora L. (naturalized) and E. incerta Diimmer (a garden plant of unknown origin) has been studied by light and scanning electron microscopy.
Leaves of all the species are hypostomatic and water-stomata are occasionally present. Two different stomatal types, X and Y, differing mainly in their cuticular ornamentation, were found in the southern African species. The grouping of species based on stomatal characters supports a previous grouping of species on the basis of periderm and seed characters.
Conspicuous lipid bodies, usually present in the subsidiary cells, are limited to the southern African species. Although the subsidiary cells do not differ in shape and size from adjacent epidermal cells, their contents often have a higher tannin content than ordinary epidermal cells. The variable patterns of arrangement of the three to five subsidiary cells makes it difficult to identify the stomata with existing classifications based on mature topography. Thus, a new term 'anomostaurocytic' is proposed for the stomatal type found in the southern African species.
Stomata of E. uniflora and E. incerta are paracytic and anomocytic respectively, and the cuticular ornamentation of their stomata differs from those of the southern African species. The view that E. incerta is not closely related to the southern African species is supported by differences in its cuticular ornamentation, lack of lipid bodies in the subsidiary cells, anomocytic stomata and prominent T-pieces at the guard cell poles. 相似文献
Leaves of all the species are hypostomatic and water-stomata are occasionally present. Two different stomatal types, X and Y, differing mainly in their cuticular ornamentation, were found in the southern African species. The grouping of species based on stomatal characters supports a previous grouping of species on the basis of periderm and seed characters.
Conspicuous lipid bodies, usually present in the subsidiary cells, are limited to the southern African species. Although the subsidiary cells do not differ in shape and size from adjacent epidermal cells, their contents often have a higher tannin content than ordinary epidermal cells. The variable patterns of arrangement of the three to five subsidiary cells makes it difficult to identify the stomata with existing classifications based on mature topography. Thus, a new term 'anomostaurocytic' is proposed for the stomatal type found in the southern African species.
Stomata of E. uniflora and E. incerta are paracytic and anomocytic respectively, and the cuticular ornamentation of their stomata differs from those of the southern African species. The view that E. incerta is not closely related to the southern African species is supported by differences in its cuticular ornamentation, lack of lipid bodies in the subsidiary cells, anomocytic stomata and prominent T-pieces at the guard cell poles. 相似文献
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BARRY BOLTON 《Systematic Entomology》1986,11(1):1-17
Available data on the tetramoriine ant genus Rhoptromyrmex Mayr are reviewed. The genus is redefined for all castes and the monotypic genus Hagioxenus Forel, formerly placed in the Monomorium-group , is synonymized with Rhoptromyrmex. A new species (caritus) is described from Uganda and keys to known workers, females and males are presented. Nest founding by the females, two of which appear autoparasitic and two of which are inquilines, is discussed and the evolutionary pathway of inquilines reviewed. Current taxonomic data on all species are summarized. 相似文献
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Fernanda da Cruz Andreia C. Turchetto‐Zolet Nicole Veto Cláudio Augusto Mondin Marcos Sobral Maurício Almerão Rogério Margis 《Botanical journal of the Linnean Society. Linnean Society of London》2013,172(4):532-543
Myrtaceae are one of the most species‐rich families of flowering plants in the Neotropics. They include several complex genera and species; Hexachlamys is one of the complex genera. It has not been recognized as a distinct genus and has been included in Eugenia, based on morphological grounds. Therefore, molecular systematic studies may be useful to understand and to help to solve these relationships. Here, we performed a molecular phylogenetic analysis using plastid and nuclear data in order to check the inclusion of Hexachlamys in Eugenia. Plastid (accD, rpoB, rpoC1, trnH‐psbA) and nuclear (ITS2) sequence data were analysed using Bayesian and maximum parsimony methods. The trees constructed using ITS2 and trnH‐psbA were the best able to resolve the relationships between species and genera, revealing the non‐monophyly of Hexachlamys. The molecular phylogenetic analyses were in agreement with previous morphological revisions that have included Hexachlamys in Eugenia. These results reinforce the importance of uniting knowledge and strategies to understand better issues of delimitation of genera and species in groups of plants with taxonomic problems. © 2013 The Linnean Society of London, Botanical Journal of the Linnean Society, 2013, 172 , 532–543. 相似文献
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Marten Sørensen 《Nordic Journal of Botany》1988,8(2):167-192
The genus Pachyrhizus is revised in order to establish the distribution of the species and their variation. Three species in cultivation ( P. erosus, P. tuberosus and P. ahipa ) and two species only occurring in the wild ( P. ferrugineus and P. panamensis ) are recognized. P. strigosus is considered conspecific with P. erosus . All the infraspecific taxa proposed by Clausen are considered untenable. The new combination P. ferrugineus is made for what was previously know as P. vernalis . 相似文献
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Hans V. Hansen 《Nordic Journal of Botany》1985,5(6):543-546
In connection with a revision of Gerbera L. nom. cons. in Africa the genus Perdicium L. is revised. The genus includes two species, P. capense L. and P. leiocarpum DC. in the Western Cape Region of South Africa. 相似文献
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In the course of monographic work in Myrtaceae it has become evident thatEugenia prismatica cannot be accommodated within any existing genus in the family. Therefore, a new genus,Curitiba, is described to contain it and the new combinationCuritiba prismatica is made.Curitiba is diagnosed by a combination of 4-angled hypanthia and fruits, ovules radiating from a central protruding placenta, and
seed coats with wavy rows of papillae. A key is provided to distinguishCuritiba from the Caribbean and Mesoamerican genusMosiera, where the species also had been placed before this transfer, and from other 4-merous genera in Brazil of subtribe Myrtinae.
In the Atlantic Forest of Brazil where the family Myrtaceae is one of the most species rich and ecologically important plant
families, the discovery ofCuritiba reveals a unique evolutionary lineage, highlights the endemism present in the Atlantic Forest, and underscores, the urgent
need for conservation of this rapidly disappearing and highly endangered biome. 相似文献
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A. V. Solovyev 《Entomological Review》2014,94(5):698-711
Based on a complex study of morphology of adults, male and female genitalia, functional musculature of male genitalia, and molecular characters, three subgenera were distinguished in the genus Cania: the nominative one, Paracania Solovyev subgen. n. (type species Neaera bilinea Walker, 1855), and Minicania Solovyev subgen. n. (type species C. minuta Holloway, 1986). The genus Cania presently includes 21 species, two of which are described as new ones: C. (Paracania) lourensi Solovyev sp. n. (Philippines: Luzon, Negros, Panay) and C. (Minicania) kitchingi Solovyev sp. n. (Thailand). New synonymies are established: C. bilinea (Walker, 1855) = C. polyhelixa Wu et Fang, 2009 syn. n. and C. robusta Hering, 1931 = C. pseudobilinea Wu et Fang, 2009 syn. n. 相似文献
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A critical review of the sipunculan genus Lithacrosiphon , based on all of the type material and museum specimens with the exception of L. uniscutatus , results in the combining of nine species into three. L. maldivensis with its granular anal shield remains unchanged. L. cristatus with a grooved anal shield and both unidentate and bidentate hooks is redescribed and now includes L. altriconus, L. gurjanovae, L. indicus , and L. odhneri . The L. uniscutatus complex which allegedly has only unidentate hooks is discussed and now includes L. kukenthali and L. poritidis . This is a troublesome species as the pertinent specimens were either unavailable ( L. uniscutatus ) or with missing introverts ( L. kukenthali and L. poritidis ). An identification key is provided and the several morphological characters used for purposes of identification are reviewed and evaluated. 相似文献