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| Registros recuperados: 22 | |
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| Silva,Marcelo Aparecido de Souza; Varassin,Isabela Galarda. |
| ABSTRACT Plant size and clonality are important traits for explaining the reproductive effort of clonal plants. Larger plants can invest more resources into reproduction, and clonality is known to increase reproductive effort. Moreover, reproductive effort is influenced by environmental variation, and so the spatial distribution of plants may affect plant reproductive effort. We investigated the effect of plant size, clonality and spatial distribution on the reproductive effort of Vriesea carinata in the Atlantic Forest in the state of Paraná, Brazil. We marked twenty individual plants and measured their rosette size, biomass and number, as well as rosette reproductive effort (number of flowers, fruits and seeds). We also evaluated the relationship between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clonal growth; Morphological variation; Reproductive effort; RNSM; Vriesea. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300401 |
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| ABEGG,ARTHUR D.; AZEVEDO,WEVERTON S.; FRANCO,FRANCISCO L.; DUARTE,MARCELO R.. |
| Abstract: We recorded a second specimen of the poorly known insular blind snake Liotyphlops caissara. This new specimen expands the morphological variation of the number of dorsal scales in the genus Liotyphlops to 296 (vs. 304 in L. wilderi) and, considering the fact that the holotype of this species was destroyed, the present specimen represents the only available L. caissara individual in zoological collections. Also, this new record constitutes the first out of type locality and expands the distribution of the species in about 40 km to the northeastern. According to IUCN criteria (B1a, b [iii]), we suggest that L. caissara be included in the “Endangered” category, since it occurs in only two insular locations and exhibits an occurrence extension of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic rainforest; Geographic distribution; Morphological variation; Southeastern Brazil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500611 |
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| Menezes,Natália Matos de; Neves,Elizabeth Gerardo; Barros,Francisco; Kikuchi,Ruy Kenji Papa de; Johnsson,Rodrigo. |
| The morphology of sessile invertebrates, such as scleractinian corals, can be controlled by environmental and genetic mechanisms and, consequently, it is highly variable. Morphological variation has puzzled taxonomists by posing challenges to species classification within cryptic species complexes. The 'Atlantic Siderastrea Complex' is a suitable example. Because of overlapping diagnostic traits, the morphological interspecific limits of this group remain controversial and often resulted in doubtful synonyms. In addition, the recent identification of the Caribbean S. radians in the Southwestern Atlantic has revealed that intraspecific variation has been equivocally assessed. Traditionally, hierarchical categories of variation have been the criteria used to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Systematics; Siderastrea radians; Morphological variation; Biogeographic expansion; South Atlantic. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100012 |
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| Hernández Nicolás, Nancy Yazmin. |
| En México se consignan 45 especies para el género Jatropha (Euphorbiaceae). La Reserva de las Biosfera de Tehuacán-Cuicatlán concentra riqueza genética y endemismo para este género, que proporciona alimento, medicina y energía a los habitantes, pero falta información sobre la distribución, ecología y aprovechamiento de las especies. Esta tesis se organizó en tres capítulos. En el primero se precisaron taxonómicamente las especies de Jatropha, se diferenciaron las Unidades Ambientales (UA) en las que habitan, se valoró el estado de conservación de sus hábitats y se calificó la vulnerabilidad de sus poblaciones; en el segundo capítulo, se verificó la variación morfológica intra e interespecífica; y, en el último, se caracterizó el aprovechamiento... |
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Palavras-chave: Ecología; Usos; Conservación; Variación morfológica; Ecology; Uses; Conservation; Morphological variation; Genética; Maestría; Jatropha especies; Jatropha species. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2290 |
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| Lemaitre, R.. |
| As a result of a revision of the genus Parapagurus Smith, three genera are proposed: Parapagurus sensu stricto, Strobopagurus gen. nov., and Sympagurus Smith reinstated. Diagnoses of the three genera are given, and a number of structures are described. A key to aid in the identification of the genera of the family is presented. All taxa heretofore assigned to Parapagurus are reassigned. Four species of Parapagurus and six of Sympagurus occur in the western Atlantic, including a new species, Sympagurus acinops. All western Atlantic species are redescribed. Parapagurus abyssorum (Filhol) is a senior homonym of the eastern Pacific Parapagurus abyssorum Henderson, and a new name, Parapagurus holthuisi, is given to Henderson's taxon. The subspecies of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Deep-water hermit crabs; Parapagurus; Strobopagurus; Sympagurus; Systematic revision; New genus; New species; Morphological variation; Symbiotic associations.; 42.74. |
| Ano: 1989 |
URL: http://www.repository.naturalis.nl/record/317875 |
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| Lens, F.; Jansen, S.; Huysmans, S.; Robbrecht, E.; Smets, E.. |
| The Vanguerieae is a large tribe of the subfamily Ixoroideae (Rubiaceae) and consists of about 500 species in 27 genera. This study gives a detailed pollen morphological description of 30 species from 16 genera, based on light microscopy and scanning electron microscopy. The Vanguerieae are considered to be stenopalynous, although there is some evidence to question this. First, there is a difference in sexine types that clearly de® nes Keetia and Psydrax ( both reticulate) , and Canthium and Vanguerieae (both perforate with very small perforations) from the other Vanguerieae investigated. Second, pollen grains corroborate the subgeneric delimitations of Canthium sensu Bridson. Pollen morphologically the tribe is characterised by ( 1) the shape of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Vanguereae; Ixoroideae; Rubiaceae; Pollen; Morphological variation; Stenopalynous; 42.58. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/423771 |
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| Peijnenburg, Katja T.C.A.; Pierrot-Bults, Annelies C.. |
| This paper reviews the quantitative morphological variation published for Sagitta setosa Müller, 1847 and two other species described within the S. serosa-complex, viz., S. euxina Moltschanoff, 1909 from the Black Sea, and S. batava Biersteker & Van der Spoel, 1966 from the Scheldt Estuary (Netherlands). Data on total (body) length, caudal length, numbers of teeth and hooks, ovary length, and dimensions of fins are compared between these three taxa. Additionally, samples from the North Sea, Mediterranean, and Black Sea are compared to look for geographic differences. Specimens from the Mediterranean were smallest with relatively long caudal segments, and few teeth and hooks, whereas specimens from the Black Sea were largest with relatively short caudal... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Sagitta setosa; Chaetognatha; Morphological variation; European seas. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/534323 |
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| Pierrot-Bults, A.C.; Spoel, S. van der. |
| Pelagic species are widely distributed in a horizontal plane and have three-dimensional distributions, since the sea covers about 70% of the surface of the earth, and on average 4 km deep. For most macrozooplankton and micronekton groups there seems to be no great expectations of finding new taxa with the exception of gelatinous groups and of the deep sea, which is a relatively unknown especially in the benthopelagic zone close to the sea-bed. However, we do not know very much about variation, either morphological or genetical, within socalled species in different parts of their range. We think we are dealing with single very broadly distributed species, which, in reality, are species complexes consisting of several more or less cryptic species or... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Pelagic macrozooplankton/micronekton diversity; Biogeographic patterns; Genetic variation; Morphological variation; Cryptic species; 42.79. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/220316 |
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| Vanegas-Ríos,James Anyelo; Britzke,Ricardo; Mirande,Juan Marcos. |
| ABSTRACT Moenkhausia bonita occurs in numerous additional localities from the Bermejo, Paraná, Paraguay, and Uruguay river basins. Given that this finding greatly expands the distributional range of M. bonita, we carried out an intraspecific comparison, using multivariate methods for 18 morphometric and eight meristic characters taken from a comprehensive sample of 536 specimens. All localities were distributed in four major geographic groups as follows: Bermejo, Paraná, Paraguay, and Uruguay. Results of the morphometric comparisons showed significant differences among the studied groups except between the Paraguay and Uruguay groups. Statistical differences in meristic values were found for most between-group comparisons, especially in those resulting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometry; Argentina; Moenkhausia; Morphological variation; Widespread species. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100202 |
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| NASCIMENTO,FABIO OLIVEIRA DO; FEIJÓ,ANDERSON. |
| ABSTRACT The tigrina Leopardus tigrinus (Schreber, 1775) is a small-sized Neotropical spotted cat found from northern Argentina and southern Brazil to Costa Rica. Four subspecies are traditionally recognized: L. t. tigrinus (Schreber, 1775) from northern Brazil, the Guianas and eastern Venezuela; L. t. pardinoides (Gray, 1867) from western Venezuela, Colombia, Ecuador and Peru; L. t. guttulus (Hensel, 1872) from southern Brazil, Paraguay and northern Argentina; and L. t. oncillus (Thomas, 1903) from Costa Rica. We studied external and craniodental morphology in quantitative and qualitative terms from 250 specimens in order to clarify the taxonomic status of tigrina. Based on the characters analyzed in this study, we recognize three diagnosable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leopardus tigrinus; L. guttulus; L. emiliae; Subspecies; Morphological variation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017001900231 |
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| Caldara Junior,Vilacio; Leite,Yuri L. R.. |
| We evaluated geographic variation in New World porcupines of Coendou (Erethizontidae) from eastern Brazil by analyzing morphological data from museum specimens we identified as Coendou insidiosus and C. spinosus. Coendou insidiosus ranges from the states of Bahia to Espírito Santo, reaching the state of Minas Gerais in Brazil; C. spinosus extends from the states of Minas Gerais and Espírito Santo to the state of Rio Grande do Sul, in Brazil, extending into Paraguay, Uruguay, and northeastern Argentina. Our results indicate that there are three spatially coherent, morphologically distinct groups, which can be diagnosed using a combination of discrete morphological characters, and which are supported by univariate and multivariate statistical analyses. We... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rainforest; Biogeography; Morphological variation; Sphiggurus; Taxonomy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000400005 |
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| Registros recuperados: 22 | |
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