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| Registros recuperados: 15 | |
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| ROCHA,Alessandro; BARNETT,Adrian P.A.; SPIRONELLO,Wilson R.. |
| ABSTRACT Titi monkeys (family Pitheciidae) are Neotropical primates highly diversified in morphology, ecology and genetics, with a wide geographic distribution, including the Amazon, Atlantic Forest, Cerrado, Pantanal and Caatinga. This diversity, together with knowledge gaps, generates uncertainties in titi monkey taxonomy and distribution. An example is Plecturocebus baptista, with only 14 occurrence records and an ill-defined distribution based on untested geographical barriers. Here, we report the occurrence of this species at a new locality outside its known range, across the Paraná-Urariá River, which was considered a distributional limit for the species. The new record implies an overlap of P. baptista with the range of P. hoffmannsi. We document... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Biogeography; Titi monkeys; Amazon Forest; Hybridization. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400330 |
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| GUIMARÃES,JOSÉ T.F.; SAHOO,PRAFULLA K.; SOUZA-FILHO,PEDRO W.M.; FIGUEIREDO,MARIANA M.J. COSTA DE; REIS,LUIZA S.; SILVA,MARCIO S. DA; RODRIGUES,TARCÍSIO M.. |
| ABSTRACT Down-core changes in sedimentary facies, elemental geochemistry, pollen, spore, δ13C, δ15N and radiocarbon records from a filled lake, named R4, of the Serra Sul dos Carajás were used to study the relationship between the paleomorphological and paleoecological processes and their significance for Holocene paleoclimatology of the southeast Amazonia. The sediment deposition of the R4 lake started around 9500 cal yr BP. Increase of detrital components from 9500 to 7000 cal yr BP suggests high weathering of surrounding catchment rocks and soils, and deposition into the lake basin under mudflows. At that time, montane savanna and forest formation were already established suggesting predominance of wet climate. However, from 7000 to 3000 cal yr BP, a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Canga vegetation; Palynology; Carbon and nitrogen isotopes; Geochemistry. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400502 |
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| Nogueira-Melo,Georgea Santos; Lira,Carla Rejane de Sousa; Ryvarden,Leif; Gibertoni,Tatiana Baptista. |
| ABSTRACT Junghuhnia is a cosmopolitan genus of Agaricomycetes (Basidiomycota), mostly characterized by having a dimitic hyphal system and encrusted cystidia. The genus comprises 37 legitimate species, eight of which have been reported in Brazil. This study provides updated information about the diversity and distribution of Junghuhnia in Brazil by reporting J. semisupiniformis for the first time from South America, J. globospora from Brazil, J. carneola from northeastern Brazil and the state of Pará, J. nitida from the state of Pernambuco, and J. subundata from the state of Amazonas. Descriptions of J. semisupiniformis and J. globosbora, as well a key to the accepted species of Junghuhnia from Brazil, are provided. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Atlantic Forest; Caatinga; Fungi; Polypores. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200266 |
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| Garbino,Guilherme S. T; Semedo,Thiago B. F; Pansonato,André. |
| The western black tamarin, Saguinus niger, is an endemic Brazilian primate currently classified as Vulnerable by the Brazilian environmental authorities. In this paper, we report two new records from an Amazonia-Cerrado ecotone that extend the range of the species further south to the Brazilian state of Mato Grosso. Additionally, we obtained an ecological niche model (ENM) for S. nigerusing eight climatic variables. The results of the ENM analysis suggest that the species is strongly associated with lowland areas where the temperature does not vary significantly among seasons. We also point out that the Araguaia, Tapirapé, and Comandante Fontoura rivers may act, along with open Cerrado formations and more seasonal climate, as southern barriers. The absence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Cerrado; Large-bodied tamarin; Mato Grosso. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832015000200009 |
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| Nunes,Jaquelina A.; Schaefer,Carlos E.G.R.; Ferreira Júnior,Walnir G.; Neri,Andreza V.; Correa,Guilherme R.; Enright,Neal J.. |
| Vegetation and soil properties of an iron-rich canga (laterite) island on the largest outcrop of banded-iron formation in Serra de Carajás (eastern Amazonia, Brazil) were studied along a topographic gradient (738-762 m asl), and analyzed to test the hypothesis that soil chemical and physical attributes play a key role in the structure and floristic composition of these plant communities. Soil and vegetation were sampled in eight replicate plots within each of the four vegetation types. Surface (0-10 cm) soil samples from each plot were analyzed for basic cations, N, P and plant species density for all species was recorded. CCA ordination analysis showed a strong separation between forest and non-forest sites on the first axis, and between herbaceous and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Canga; Carajás; Ferruginous campo rupestre; Iron formation; Laterite. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502097 |
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| Santos,Allan Paulo Moreira; Jardim,Gabriela Abrantes; Nessimian,Jorge Luiz. |
| Three new species of Hydroptilidae are herein described and illustrated from specimens collected with light traps in the states of Pará and Rio de Janeiro, Brazil. Flintiella carajas sp. nov., from Floresta Nacional de Carajás, shares with F. panamensis Harris, Flint & Holzenthal, 2002, F. tamaulipasa Harris, Flint & Holzenthal, 2002, F. yanamona Harris, Flint & Holzenthal, 2002, and F. manauara Santos & Nessimian, 2009 a deeply incised phallic apex. However, males can be distinguished by a ventromesal process on segment VII, by lacking dorsal hooked processes on segment IX, by the elongate subgenital plate, and by the lateral lobes of the phallic apex slightly curved laterad. Rhyacopsyche diacantha sp. nov. is closely... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Atlantic Forest; Flintiella carajas; Rhyacopsyche angra; Rhyacopsyche diacantha. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600015 |
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| JEFFREYS,Manoel Feitosa; NUNEZ,Cecilia Veronica. |
| ABSTRACT The Amazon forest is rich in plant species diversity, among them,Piranhea trifoliata stands out, which is popularly known as piranheira, because their fruits are eaten by fish. Their barks are used as bath composition on uterus inflammation and as tea in malaria treatment. This study aimed to fractionate the dichloromethane and dichloromethane phase from methanolic extract of leaves of Piranhea trifoliata. The leaves were dried, grounded and extracted with dichloromethane, methanol and water. The methanol extract was partitioned with dichloromethane and ethyl acetate. The chromatographic fractionation yielded six pentacyclic triterpenoids: friedelan-3-one, 28-hydroxy-friedelan-3-one, 30-hydroxy-friedelan-3-one, lupeol, α- and β-amyrin mixture,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; NMR analysis; Steroids; Terpenes. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200189 |
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| Santos,Allan Paulo Moreira; Takiya,Daniela Maeda; Nessimian,Jorge Luiz. |
| Costatrichia Mosely, 1937 is a Neotropical genus included in the subfamily Leucotrichiinae. Previously, this genus included 14 described species, two from Brazil and eight from Costa Rica. Based on recent specimens collected with light traps in the Brazilian Amazon and Costa Rica, we describe two new species: Costatrichia ipixuna sp. nov. from the state of Amazonas, Brazil (C. lodora group) and C. falsa sp. nov. from Puntarenas, Costa Rica (C. simplex group). Costatrichia ipixuna sp. nov. is most similar to C. noite Angrisano, 1995, but can be distinguished by the shallower U-shaped incision on posterior margin of sternum VIII, by the absence of the lateral projection of the same segment bearing very long setae, and by the phallus with a pair of spine-like... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Forest; Costa Rica; Costatrichia ipixuna sp. nov.; Costatrichia falsa sp. nov.; Microcaddisflies. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400012 |
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| Registros recuperados: 15 | |
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