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Genève, Switzerland

Zehtindjiev P.,Bulgarian Academy of Science | Ivanova K.,Bulgarian Academy of Science | Mariaux J.,Natural History Museum of Geneva | Georgiev B.B.,Bulgarian Academy of Science
Parasitology Research | Year: 2013

A total of 76 birds belonging to 23 species and 14 families was examined for the presence of Plasmodium spp. and Haemoproteus spp. Birds were trapped at four localities in Gansu Province, China, in June-July 2011. DNA was isolated from blood samples and parasite detection, and identification was based on PCR assays and sequences of 479 bp of cyt b gene. The total prevalence of haemosporidians was 21.0 %. Haemoproteus spp. were detected in 14 birds (prevalence 18.4 %). The lineage CYAPIC1 from Cyanopica cyanus, Parus major, Passer montanus and Pyrrhocorax pyrrhocorax was new; it is genetically distinct and probably represents a new species of the genus Haemoproteus. Three lineages represented known species: RBS4 (from Lanius tephronotus), a lineage of Haemoproteus lanii; COLL2 (from Turdus mupinensis), a lineage of Haemoproteus pallidus and TURDUS2 (from Turdus rubrocanus), a lineage of Haemoproteus minutus. The lineage RBS5 (from Lanius cristatus and L. tephronotus) differs by 1.4 % from RBS4 and probably represents an intraspecific entity of H. lanii. The lineages TUCHR1 (recorded from T. mupinensis), WW1 (recorded from Upupa epops) and YWT2 (recorded from Motacilla flava) have not been linked to any known species for the moment. Only one bird was positive for Plasmodium (prevalence 1.4 %), i.e. P. major infected with the lineage GRW4 of Plasmodium relictum. The latter lineage has been considered by previous studies as typical for migratory birds and having transmission in tropical areas only; its record in a sedentary bird in China suggests its transmission in temperate latitudes. © 2013 Springer-Verlag Berlin Heidelberg. Source

Benyoucef M.,University of Mascara | Meister C.,Natural History Museum of Geneva
Cretaceous Research | Year: 2015

Fifteen stratigraphic sections located in different parts of the Guir basin (Southwest Algeria) have been measured bed-by-bed and sampled in great detail, to study the stratigraphy, describe and interpret the facies and characterize the depositional environment of the Cenomanian-Turonian succession. Based on their stratigraphic ranges, lithofacies, regional distributions and depositional settings, the Cenomanian-Turonian succession is subdivided into three lithostratigraphic formations that are bounded by a regional scale discontinuity: the "Grès rouges" Formation attributed to the lower Cenomanian; the "Marnes à gypse inférieures" Formation assigned to the lower-middle Cenomanian and the "Calcaires de Sidi Mohamed Ben Bouziane" Formation placed in the upper Cenomanian-lower Turonian. Analyses of litho-, bio-, and microfacies resulted in the recognition of 25 facies types for this succession. These facies types have been grouped into seven facies associations (AF1 to AF7). The facies represented range from clastic, to evaporitic to carbonate, and were deposited in four major depositional environments: fluvial, siliciclastic costal, sabkha and homoclinal carbonate ramp settings. The main factors controlling depositional environments were eustatic sea-level fluctuations combined with environmental influences such as autochthonous carbonate productivity and siliciclastic supply. © 2014 Elsevier Ltd. Source

Jukema and colleagues published in The Auk a study dealing with geographic variation within the Pacific Golden-Plover (Pluvialis fulva). We highlight a taxonomic problem created unwittingly by the last sentence of their article, in which the authors suggest a new name for the Siberian population. © 2016 American Ornithologists' Union. Source

Ruedi M.,Natural History Museum of Geneva | Biswas J.,National Cave Research and Protection Organization | Csorba G.,Hungarian Natural History Museum
Revue Suisse de Zoologie | Year: 2012

The bat fauna of Meghalaya, north-eastern India, is very diverse but still improperly known. Recent field work revealed several previously unrecorded bats, especially in the southern and eastern hill ranges known as the Khasi and Jaintia Hills. We resolve here the systematic position of two Marina species that belong to the "swilla-group" and "cycloftis-group", respectively, using a combination of morphological and molecular characters. Both taxa proved to be morphologically and genetically distinct from any known species and are therefore described here as new species. So far, M. jaintiana sp. nov. has been found both in the Jaintia Hills of eastern Meghalaya, and in the Chin Hills of north-eastern Myanmar, while M. pluvialis sp. nov. is only known from the dense evergreen forests of the Khasi Hills, close to the Meghalaya border with Bangladesh. During the last few decades, these areas have suffered serious habitat degradation due to deforestation associated with mining activities, and both require urgent conservation measures to preserve their unique natural resources. Source

Meister C.,Natural History Museum of Geneva
Stratigraphy | Year: 2010

The present paper is an inventory of the biostratigraphical ammonite data at the boundaries of the Sinemurian and Pliensbachian Stages and of the Lower-Upper Pliensbachian Substages. Sinemurian and Pliensbachian Stages belong to the Early Jurassic (Lias) and the age of their boundary is 190 m.y. following the last version of the Geologic Time scale compiled by Walker and Geissman (2009). Since 2006, the Global boundary Stratotype Section and Point (GSSP) for the base of the Pliensbachian Stage is formally defined at Wine Haven in Yorkshire Coast (UK). This level coincides with the ammonite association Bifericeras donovani Dommergues and Meister and Apoderoceras sp. which define the base of the Taylori Sub- chronozone of the Jamesoni Chronozone. For the Lower-Upper Pliensbachian boundary, estimated at 186.5 m.y. there is no formal definition with a GSSP until now. Several options remain open as well in the Euroboreal Domain (Hebrides, Yorshire, Dorset in UK, Causses Basin in France, Cordillera Iberica in Spain, Lusitanian Basin in Portugal) as in the Tethyan Domain (Subbeticas in Spain, Apennines in Italy, Bakony in Hungary). Worldwide correlations (Euroboreal, Tethyan and East Pacific Domains) at these boundaries are proposed based on ammonites after critical review of their taxonomy and biostratigraphy. Indeed for Lower Jurassic, ammonites represent the best fossil group for precise biostratigraphy and correlation and that is why the standard chronostratigraphic framework (at zonal level) has been based on them since Oppel (1856-58). Source

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