592 research outputs found

    Paleoethology : fossilized behaviours in amber

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    When organisms became trapped in sticky resin they usually expired so quickly that they could fossilize in almost lifelike circumstances. Based on frequent description in literature of many examples we propose in this paper a classification of these paleobehaviours

    Paleoethology: fossilized behaviours in amber

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    When organisms became trapped in sticky resin they usually expired so quickly that they could fossilize in almost lifelike circumstances. Based on frequent description in literature of many examples we propose in this paper a classification of these paleobehaviours

    Presencia del géner o Dicerca (Coleoptera, Buprestidae) en el Mioceno Superior de la depresión ceretana (Lleida, NE de España)

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    A new fossil of Coleoptera Buprestidae of the genus Dicerca ESCHSCHOLTZ 1829 from Cerdanya outcrop (Upper Miocene) is described. This is the third record of this family in the iberian outcrops

    Presencia del géner o Dicerca (Coleoptera, Buprestidae) en el Mioceno Superior de la depresión ceretana (Lleida, NE de España)

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    Se describe un nuevo fósil de Coleoptera Buprestidae atribu i ble al género Dicerca ESCHSCHOLTZ 1829 en el yacimiento de la Cerdanya (Mioceno Superior). Es el tercer registro fósil de esta familia que se descubre en los yacimientos ibéricos.A new fossil of Coleoptera Buprestidae of the genus Dicerca ESCHSCHOLTZ 1829 from Cerdanya outcrop (Upper Miocene) is described. This is the third record of this family in the iberian outcrops

    Magnetic, electronic and vibrational properties of metal and fluorinated metal phthalocyanines

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    The magnetic and electronic properties of metal phthalocyanines (MPc) and fluorinated metal phthalocyanines (F16_{16}MPc) are studied by means of spin density functional theory (SDFT). Several metals (M) such as Ca, all first d-row transition metals and Ag are investigated. By considering different open shell transition metals it is possible to tune the electronic properties of MPc, in particular the electronic molecular gap and total magnetic moment. Besides assigning the structural and electronic properties of MPc and F16_{16}MPc, the vibrational modes analysis of the ScPc\textendash ZnPc series have been studied and correlated to experimental measurements when available.Comment: 28 pages (preprint style), several figure

    Skogler: Photography at the Service of Falangism (Zaragoza, July 1936)

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    This article analyses the role of "Skogler" (Ángel Cortés Gracia), a photographer who worked for the insurgent Falangist forces in the city of Zaragoza, the capital of Aragón, from the beginning of the Spanish Civil War. Skogler's strong and early ties to the fascist movement, going back years before the war, suggest a special profile of an individual who supported the Falangist party by means of visual propaganda and printed photographs. Most of the photographs selected for study here have never been published before. They were shot in the early days of the military uprising against the Republic and help give us a more accurate understanding of armed fascism in the Aragonese capital, which ultimately fell to the rebels. This paper is part of an ongoing research project and exhibition to analyse and describe the contents and physical characteristics of the Skogler Archive, composed of more than 3,500 negatives recovered in diverse chronological phases.This article is a contribution to the research project: ‘From manuscript to screens: memory, artefacts and cultural practices (15th Century to present)’. Spain, Ministry of Economy, Industry and Competitiveness. Ref: HAR2016-76550P. Principal investigator: Dr. Enrique Villalba Pérez (UC3M)

    New taxa of oribatid mites of the family Liacaridae (Acariformes: Oribatida) from the Caucasus

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    In this paper new taxa belonging to the family Liacaridae from the Caucasus (Georgia) are described: a new subgenus and species Adoristes (Gordeeviella) krivolutskyi subg. n., sp. n. and a new species Liacarus (Liacarus) longipilis sp. n. The new subgenus Adoristes (Gordeeviella) differs from Adoristes (Adoristes) Hull, 1916 by the shape of its sensilla, with the tip sharply pointed, and of its lamellae, without cuspis. The new species Liacarus (L.) longipilis differs from the rest of species of Liacarus by the presence of very long notogastral setae

    La recuperación documental de la imagen fotográfica: perspectiva tecnológica y documental

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    Actas de las Primeras Jornadas Imagen, Cultura y Tecnología celebradas del 1 al 5 de julio de 2002 en la Universidad Carlos III de Madri

    First fossil record of the oribatid family Liacaridae (Acariformes: Gustavioidea) from the lower Albian amber-bearing site of Ariño (eastern Spain)

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    We describe the first beetle mite (Oribatida) found in the lower Albian (Lower Cretaceous) amber-bearing site of Ariño, located in the Teruel Province (eastern Iberian Peninsula). It represents the first fossil record of the family Liacaridae (Acariformes: Oribatida: Gustavioidea). A new species, Liacarus (Procorynetes) shtanchaevae Arillo and Subías sp. nov., is described and compared with the living species of the subgenus Liacarus (Procorynetes). Notes on its biogeography and palaeobiology are provided. It corresponds to the first Cretaceous record of an extant oribatid subgenus and bears witness to the wide range of distribution that the ancient representatives of the subgenus may have had. Most of the oribatid species from Cretaceous ambers belong to living genera, which reflects the high degree of morphological stasis, or bradytely, over the evolutionary history of oribatid mites since the Early Cretaceous
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