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Search Results: 1 - 10 of 60 matches for " Amber "
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Description of Pintomyia (Pifanomyia) brazilorum sp. nov. a new fossil species from the Dominican Republic (Diptera: Psychodidae: Phlebotominae)
Andrade Filho, José Dilermando;Galati, Eunice A Bianchi;Falc?o, Alda Lima;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000200004
Abstract: a sand fly fossil was found in amber, a vegetal resin, which allows all the external phlebotomine structures to be seen. the piece that contains the new species is 14 mm long ′ 8 mm wide ′ 3 mm high. all the structures from the head, thorax, and abdomen were examined under the microscope and measured with a calibrated micrometric eye-piece. the morphological aspects of the new species suggest its inclusion in the pintomyia genus, pifanomyia subgenus though it is not possible to include it in any of the series known for this subgenus. the presence of two atrophied spines on the gonostyles and gonocoxites without tufts of setae permit the exclusion of the new species from the other species of the subgenus pifanomyia. the new species is named pintomyia (pifanomyia) brazilorum sp. nov.
Composi??o molecular e origem paleobotanica de ambares da bacia do Araripe, Forma??o Santana
Pereira, Ricardo;Carvalho, Ismar de Souza;Fernandes, Ant?nio Carlos Sequeira;Azevedo, Débora de Almeida;
Química Nova , 2009, DOI: 10.1590/S0100-40422009000600032
Abstract: the terpenoid composition of seven amber samples from araripe basin (santana formation, crato member) has been analyzed by gas chromatography-mass spectrometry to determine their botanical origin. the diterpenoids, which have been identified in the fossil resin extracts are derived primarily from the abietane class, e.g., dehydroabietane, 4-epidehydroabietol, 16,17,18-trisnorabieta-8,11,13-triene, 7-oxo-16,17,19-trisnorabieta-8,11,13-trieno, dehydroabietic acid, ferruginol, hinokiol and hinokione. their composition is certainly typical for conifers, and angiosperms can be excluded as the botanical source, as no triterpene was identified. the terpenoid characteristics strongly support a relationship to the araucariaceae or podocarpaceae families. in addition, the fossil record of the embedding sediments (pollen and fossil leaves) also supports the proposal of these paleobotanical origins for the ambers.
The extinct Baltic amber genus Propelma Trjapitzin, a valid genus of Neanastatinae (Hymenoptera, Eupelmidae)
Gary Gibson
ZooKeys , 2013, DOI: 10.3897/zookeys.283.4665
Abstract: The extinct Eocene Baltic amber genus Propelma Trjapitzin 1963 is removed from synonymy under Eupelmus Dalman 1820 (Hymenoptera, Eupelmidae, Eupelminae) and treated as a valid genus within Neanastatinae Kalina 1984 based on examination of the holotype female of P. rohdendorfi Trjapitzin. Propelma rohdendorfi is redescribed, illustrated by photomacrographs, and compared to other described extant and extinct genera of Neanastatinae. Taxonomic, morphological and geological diversity of Neanastatinae relative to Eupelminae and Calosotinae is also discussed relative to potential age of the subfamily.
Day-to-Day Variability of H Component of Geomagnetic Field in Central African Sector Provided by Yaoundé-Cameroon Amber Station  [PDF]
Messanga Etoundi Honore, Kosh Djaka Comelo, Mbane Biouele Cesar
International Journal of Geosciences (IJG) , 2014, DOI: 10.4236/ijg.2014.510099
Abstract: The geomagnetic data obtained from Amber Network station in Cameroon have been used for this study. The variability of H component of geomagnetic field has been examined by using geomagnetic field data of X and Y components recorded at AMBER magnetometer station hosted by the Department of Physics of University of Yaoundé (3.87°N, 11.52°E). The day-to-day variability of the horizontal intensity of the geomagnetic field was examined and shows that the scattering of H component of magnetic field variation is more on disturbed than that on quiet condition. The signatures H of geomagnetic Sq and Sd variations in intensities in the geomagnetic element, has been studied. This study shows that the daytime variations in intensities of geomagnetic elements H, Sq(H) and Sd(H) respectively are generally greater than night-time ones. This paper interests answering the two questions: 1) how can geomagnetic variations be used to study the equatorial ionosphere electrodynamics and electrojet equatorial over Africa in general and Cameroon in particular? 2) How can geomagnetic variations be used to monitor and predict space weather events in Cameroon? This paper presents and interprets the results of H component of geomagnetic field variations during magnetic storms and on quiet days.
Pintomyia (Pifanomyia) paleotownsendi, a new sand fly from the Miocene amber of Dominican Republic (Diptera: Psychodidae: Phlebotominae)
Andrade Filho, José Dilermando;Falc?o, Alda Lima;Galati, Eunice A Bianchi;Brazil, Reginaldo Pe?anha;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006001000010
Abstract: phlebotominae includes some vector species, mainly that of leishmaniases, with a very old host-parasite relationship. some species fossils of this subfamily have been recently described and this paper presents the description of a new sand fly pintomyia (pifanomyia) paleotownsendi sp. nov in amber. the gonostyle present four spines, being one apical, one external superior implanted close to the apical third, one external inferior in the middle of the structure and one internal implanted in the basal third. this disposition of the spines may separate the new species from others in the sub genus.
The First Geogarypid (Pseudoscorpiones, Geogarypidae) in Rovno Amber (Ukraine)
H. Henderickx, E. E. Perkovsky
Vestnik Zoologii , 2012, DOI: 10.2478/v10058-012-0022-0
Abstract: The first Geogarypus found in Rovno amber appears to be conspecific with Geogarypus gorskii Henderickx 2005, a species known from Eocene Baltic amber.
Molecular composition, chemotaxonomical aspects and botanical origin of Brazilian amber [Composi o molecular, aspectos quimiotaxon micos e origem botanica de ambares brasileiros]
Ricardo Pereira,Ismar S. Carvalho,Antonio Carlos S. Fernandes,Débora A. Azevedo
Revista Virtual de Química , 2011,
Abstract: Amber is a plant fossil resin constituted mainly by diterpenes of several classes, such as abietanes, labdanes, pimaranes and kauranes. The botanical origin of amber is related to angiosperms and gymnosperms, depending on the geological period and where it was produced. The analysis of its chemical composition performed using gas chromatography coupled to mass spectrometry and carbon 13 nuclear magnetic resonance allows the determination of the possible botanical sources, allowing obtaining important information regarding the resinous flora on the geological past of the Earth. Although amber samples are studied primarily by geochemists and paleontologists in the context of paleobotany and paleozoology, the research about its molecular composition is directly related to chemotaxonomy and phytochemistry. The results obtained to Brazilian amber samples until this moment allowed the determination of three possible amber botanical sources in Cretaceous period – Araucariaceae, Podocarpaceae e Cheirolepidiaceae.
Description of Pintomyia (Pifanomyia) paleotrichia, a Miocene period new species from the Dominican Republic (Diptera: Psychodidae: Phlebotominae)
Andrade Filho, José Dilermando;Brazil, Reginaldo Pe?anha;Falc?o, Alda Lima;Galati, Eunice A Bianchi;
Memórias do Instituto Oswaldo Cruz , 2007, DOI: 10.1590/S0074-02762007005000110
Abstract: a new fossil species of phlebotomine sandflies is described from dominican amber based in one specimen. pintomyia (pifanomyia) paleotrichia sp. nov. is distinguished from the other extant and extinct species by aspects of paramere and the basal tuft of bristles in the gonocoxite.
Estudios preliminares de estabilidad de un extracto lipídico de los frutos de Roystonea regia en frascos de vidrio ámbar
Sierra Pérez,Roxana de la Caridad; Rodríguez Leyes,Eduardo Antonio; González Canavaciolo,Víctor Luis; Marrero Delange,David; Vicente Murillo,Roxana;
Revista Cubana de Farmacia , 2010,
Abstract: the d004 is a new active ingredient extracted from the cuban real palm (roystonea regia), promising in the treatment of the benign prostatic hyperplasia. to determine its stability in amber glass flasks studies were conducted where samples underwent different conditions. in stress situations d004 is sensitive to the thermal and oxidative degradation. under accelerated conditions (40 ± 2 oc ad 75 ± 5 % of relative humidity) there weren't significant changes in any assessed parameters during 12 months allowing predicting a useful life time of at least 2 years under less drastic conditions. it was corroborated under climatic conditions ii (25 ± 2oc and 60± 5% of relative humidity and iv (30 ± 2 oc and 70 ± 5 % of relative humidity).
The First Eocene Species of the Genus Cryptophagus (Coleoptera, Clavicornia, Cryptophagidae)
G. Yu. Lyubarsky, E. E. Perkovsky
Vestnik Zoologii , 2012, DOI: 10.2478/v10058-012-0007-z
Abstract: Based on a fossil specimen from the Late Eocene Rovno amber (Ukraine), Cryptophagus harenus Lyubarsky et Perkovsky, sp. n., an Eocene species of this genus is described. The new species is similar to the extant desert species Cryptophagus desertus Lyubarsky and C. recticollis Solsky, differing by the large callosity occupying 1/4 length of lateral margin of pronotum.
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