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| Registros recuperados: 2,235 | |
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| Bartozek,Elaine Cristina Rodrigues; Bueno,Norma Catarina; Ludwig,Thelma Alvim Veiga; Tremarin,Priscila Izabel; Nardelli,Margaret Seghetto; Rocha,Angélica Cristina Righetti da. |
| This study represents a taxonomic survey of class Bacillariophyceae diatoms found in samples collected in the Iguaçu River (Iguaçu National Park, municipality of Foz do Iguaçu, in the state of Paraná, Brazil) between August 2007 and July 2008. Two sampling stations were utilized, the first located upstream of Iguaçu Falls (Cais Bananeiras Station) and second downstream of the falls (Cais Macuco Safari Station). The study resulted in the identification of 86 taxa, including 74 at the specific level and seven taxonomic varieties. Two of these had never before been documented in the state of Paraná: Gomphonema gibberum Hustedt and Pinnularia meridiana Metzeltin & Krammer. Nine are first-time records for Brazil: Cymbella charrua Metzeltin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomy; Microalgae; Lotic system; State of Paraná. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100012 |
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| Biolo,Stefania; Bueno,Norma Catarina; Siqueira,Natália Silveira; Moresco,Carina. |
| This work is part of a survey of the desmid flora in a tributary of the Itaipu Reservoir, in the state of Paraná, Brazil. The objective was to expand the knowledge base regarding the genus Cosmarium (Desmidiaceae, Zygnematophyceae). We conducted a qualitative analysis of 60 samples of phytoplankton, which were collected from along the banks of the São Francisco Falso River between July of 2003 and June of 2004. We identified, drew, and described 18 taxa of Cosmarium. Of those 18 taxa, 8 represent new records for the state of Paraná: C. angulosum Bréb. var. angulosum, C. bireme Nordst. var. bireme, C. clepsydra Nordst. var. clepsydra, C. cf. galeritum Nordst. var. borgei, C. ginzbergeri, C. norimbergense Reinsch var. norimbergense, C. protractum (Nägeli) De... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Desmids; Phytoplankton; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100001 |
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| Hernández,Marcelo Paulo; Katinas,Liliana; Arambarri,Ana María. |
| In this paper we examine lipophilic substances, tannins, proteins, reducing carbohydrates, starch, and oxalate salts in early lineages of Asteraceae to test if they are a useful complement to classification studies. Styles of mature flowers of 44 species were processed according to plant histochemical techniques and observed by means of a light microscope. Lipophilic compounds were always present in the cuticle and cell walls, and in some species were located inside the cells. Proteins were located in the style cell walls and cell interior of most of the analyzed species. No tannins were found. In general, there is a correlation in the presence of reducing sugars and proteins. Starch granules and oxalate salts were found in the style parenchyma of a few... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compositae; Crystal salts; Lipophilic substances; Proteins; Starch; Sugars; Taxonomy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400575 |
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| Lima,Diogo Xavier; Souza-Motta,Cristina Maria; Lima,Catarina Letícia Ferreira de; Souza,Carlos Alberto Fragoso de; Ribeiro,Jonathan Ramos; Santiago,André Luiz Cabral Monteiro de Azevedo. |
| ABSTRACT As primary decomposers of organic matter, mucoralean fungi have an important ecological role in edaphic systems in the Atlantic Forest. However, there is a knowledge gap regarding how communities of Mucorales are structured in soils of Atlantic Forest areas, and whether these communities are influenced by edaphic attributes in this domain. Thus, the current study aimed to understand the influence of edaphic attributes linked to species richness, abundance and composition of Mucorales in dense ombrophilous forest, ‘tabuleiro’ forest, sandbank and mangrove ecosystems located in Pernambuco, Brazil. Altogether, twenty-three taxa, including seven new records, were reported from soil samples from the ecosystems. Species composition was similar among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Basal fungal order; Diversity; Ecology; Mucorales; Mucoromycota; Mucoromycotina; Soil; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400796 |
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| Scatigna,André Vito; Saraiva,Raysa Valéria Carvalho; Couto,Arthur Filipe Mendes; Souza,Vinicius Castro; Muniz,Francisca Helena. |
| ABSTRACT A new species of Buchnera (Orobanchaceae) from Northeast Brazil is described and illustrated. Buchnera nordestina was first collected by Dr. Francisco Freire Allemão e Cysneiro ca. 160 years ago and remained undescribed until now. We provide notes on morphology, geographic distribution, and conservation status of the new species. Additionally, we present an updated identification key to all species of Buchnera from Brazil. Buchnera nordestina is characterized by long bracts that are usually two times longer than the calyx tube and by the presence of axillary brachyblasts, both of which are unique features within the genus. The new species occurs in restinga and cerrado vegetation in the Brazilian states of Ceará, Maranhão, and Piauí, and is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Buchnera; Ceará; Cerrado; Hemiparasitic; Maranhão; Orobanchaceae; Piauí; Restinga; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400789 |
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| Soares,Arthur de Souza; Harley,Raymond Mervyn; Pastore,José Floriano Barêa; Jardim,Jomar Gomes. |
| ABSTRACT After a brief historical account of the genus, a new species, Marsypianthes tubulosa, from the Brazilian state of Tocantins is described and illustrated. The new species is similar to M. chamaedrys (Vahl) Kuntze, the most polymorphic species of the genus. It is distinguished from the other species of the genus by its habit and characters of the cyme, calyx and corolla. Comments on the taxonomy and distribution of the new species are provided, as well as a conservation assessment, distribution map, photographs and a black and white illustration. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian flora; Labiatae; Marsypianthes chamaedrys; Ocimeae; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400783 |
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| Oliveira,Thays G. L.; Bezerra,Jadson D. P.; Silva,Iolanda R. da; Souza-Motta,Cristina M.; Magalhães,Oliane M. C.. |
| ABSTRACT Plants harbour diverse communities of fungal species in their internal compartments. Endophytic fungi help their hosts to establish, survive, and adapt to different environments. Here, we examined the diversity of endophytic fungi in the leaflets and branches of Poincianella pyramidalis, a plant species endemic to the Brazilian tropical dry forest (Caatinga). A total of 360 fragments of leaflets and branches were analysed and 189 endophytic fungi were isolated and distributed among 21 ascomycetous genera based on their ITS and LSU rDNA sequences. Diaporthe was the most frequently identified genus, followed by Didymella and Rhytidhysteron. The colonisation rate of plant fragments was higher in the branches (74 %) than in leaflets (14 %). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascomycetous fungi; Caatinga; Diaporthe; Dothideomycetes; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400755 |
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| Santo,Fabio da Silva do Espírito; Santos,Amanda Pricilla Batista; Ribeiro,Patrícia Luz; Rapini,Alessandro. |
| ABSTRACT Three new species of Marsdenia (Apocynaceae) are described from Brazil: M. paganuccii, known from two disjunct populations, one in the Caatinga of Bahia and other in the Atlantic Forest of Espírito Santo; M. paraibana, restricted to the Restinga of Cabedelo National Forest in the Atlantic Forest of Paraíba; and M. trisegmentata, known from two populations in Caatinga, one in Bahia and other in Ceará. Illustrations, a geographic distribution map and comparisons with morphologically similar species are also presented for each species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apocynaceae; Asclepiadoideae; Atlantic Forest; Brazil; Caatinga; Conservation; Marsdenia; Neotropics; Taxonomy; Threatened species. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200247 |
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| Heringer,Gustavo; Valdespino,Iván A.; Salino,Alexandre. |
| Selaginella P. Beauv. is the only genus in the family Selaginellaceae Willk. The genus is monophyletic, has a cosmopolitan distribution, contains about 750 species and can be characterized by the presence of rhizophores, leaves, a ligule, heterospory and adaxial, reniform sporangia. Twenty species were found in the study area: Selaginella alstonii, S. contigua, S. convoluta, S. decomposita, S. erectifolia, S. erythropus, S. flexuosa, S. jungermannioides, S. macrostachya, S. marginata, S. microphylla, S. muscosa, S. producta, S. sellowii, S. sematophylla, S. suavis, S. sulcata, S. tenella, S. tenuissima and S. vestiens. Two new species records for the state are presented (S. jungermannioides and S. tenella). We present descriptions of the genus and species,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycophytes; Pteridophytes; Selaginellaceae; Southeastern Brazil; Taxonomy. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100060 |
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| Santos,João Victor da Costa; Oliveira,Maria de Fátima Vasconcelos de; Santos Filho,Francisco Soares; Silva,Leyde Nayane Nunes dos Santos; Araújo,Josiane Silva. |
| ABSTRACT We studied the leaf anatomy of 15 species of Byrsonima and a single species of Diacidia as an outgroup to test the relevance of leaf anatomical characters to the complicated taxonomy of this genus. We present complete anatomical descriptions for petioles and leaf blades, together with an anatomical matrix, dendrogram and an identification key for the studied taxa. The most informative characters were the presence of stomatal crest, trichome type, epidermis type, contour and conformation of the vascular system in the diaphragm and medium petiole and number of accessory bundles. The aforementioned characters revealed that the anatomy of the petioles in the genus differs from that of petioles in the outgroup taxon with regard to vascular system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Murici; Plant anatomy; Similarity analysis; Taxonomy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300570 |
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| Mezzonato-Pires,Ana Carolina; Milward-de-Azevedo,Michaele Alvim; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vania. |
| ABSTRACT The subgenus Astrophea is one of the most critical and neglected subgenera of the genus Passiflora. Seven Brazilian species of P. subg. Astrophea were found to be in need of typification. Lectotypes are designated for the following names: Passiflora cauliflora, P. leptopoda, P. ceratocarpa, P. faroana, P. rhamnifolia, P. sclerophylla and P. tessmannii. An epitype was also designated for the name P. tessmannii. In addition, Passiflora alliacea was synonymized with Passiflora pentagona. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian species; Epitype; Lectotype; Nomenclature; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100149 |
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| Registros recuperados: 2,235 | |
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