Reptilia, Chelonii, Chelidae, Phrynops geoffroanus Schweigger, 1812 and Mesoclemmys vanderhaegei (Bour, 1973): distribution extension, new country record, and new province records in Argentina

The Chelonii is currently represented in Argentina by 14 species of 10 genera, belonging to six families (Richard and Waller 2000). Although several authors have addressed the study of Argentinean turtle species (e.g. Freiberg 1938; 1977; Cei 1993; Cabrera 1998; Richard 1999; Richard and Waller 2000), the knowledge about natural history and geographic distribution of some species is still fragmentary. One of these poorly known species is the freshwater turtle Phrynops geoffroanus. This turtle is widely distributed in South America eastern to the Andes, in the Orinoco, Amazonas, São Francisco, and Paraná rivers basins (Iverson 1992; Souza 2005). Bertoni (1925) recorded the presence of P. geoffroanus (as Hydraspis geoffroyana) at the locality of Puerto Bertoni in the High Paraná River, Paraguay, and suggested that it was likely to occur in northeastern Argentina, in the province of Misiones; subsequently Freiberg (1938; 1970; 1977) reported the presence of P. geoffroanus in the province of Misiones. Rhodin and Mittermeier (1983) described Phrynops williamsi and mentioned the presence of this species in the Misiones, within the distribution range of P. geoffroanus. This was accepted by other authors, who suggested that P. geoffroanus was present in Argentina (Pritchard and Trebbau 1984; Ernst and Barbour 1989; Iverson 1992; Fritz and Havas 2007). Nevertheless, most of recent studies about the Argentinean turtle fauna excluded P. geoffroanus from it, based on the absence of specimens in collections, and also because previous reports were considered to be misidentification records of P. williamsi (Waller and Chebez 1987; Richard et al. 1990; Cei 1993; Cabrera 1998; Richard 1999; Richard and Waller 2000).Fil: Baldo, Juan Diego. Universidad Nacional de Misiones; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Martínez, Pablo. Universidad Nacional de Misiones; ArgentinaFil: Boeris, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Misiones; ArgentinaFil: Giraudo, Alejandro Raul. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentin

Ku-0063794 is a specific inhibitor of the mammalian target of rapamycin (mTOR)

mTOR (mammalian target of rapamycin) stimulates cell growth by phosphorylating and promoting activation of AGC (protein kinase A/protein kinase G/protein kinase C) family kinases such as Akt (protein kinase B), S6K (p70 ribosomal S6 kinase) and SGK (serum and glucocorticoid protein kinase). mTORC1 (mTOR complex-1) phosphorylates the hydrophobic motif of S6K, whereas mTORC2 phosphorylates the hydrophobic motif of Akt and SGK. In the present paper we describe the small molecule Ku-0063794, which inhibits both mTORC1 and mTORC2 with an IC50 of ∼10 nM, but does not suppress the activity of 76 other protein kinases or seven lipid kinases, including Class 1 PI3Ks (phosphoinositide 3-kinases) at 1000-fold higher concentrations. Ku-0063794 is cell permeant, suppresses activation and hydrophobic motif phosphorylation of Akt, S6K and SGK, but not RSK (ribosomal S6 kinase), an AGC kinase not regulated by mTOR. Ku-0063794 also inhibited phosphorylation of the T-loop Thr308 residue of Akt phosphorylated by PDK1 (3-phosphoinositide-dependent protein kinase-1). We interpret this as implying phosphorylation of Ser473 promotes phosphorylation of Thr308 and/or induces a conformational change that protects Thr308 from dephosphorylation. In contrast, Ku-0063794 does not affect Thr308 phosphorylation in fibroblasts lacking essential mTORC2 subunits, suggesting that signalling processes have adapted to enable Thr308 phosphorylation to occur in the absence of Ser473 phosphorylation. We found that Ku-0063794 induced a much greater dephosphorylation of the mTORC1 substrate 4E-BP1 (eukaryotic initiation factor 4E-binding protein 1) than rapamycin, even in mTORC2-deficient cells, suggesting a form of mTOR distinct from mTORC1, or mTORC2 phosphorylates 4E-BP1. Ku-0063794 also suppressed cell growth and induced a G1-cell-cycle arrest. Our results indicate that Ku-0063794 will be useful in delineating the physiological roles of mTOR and may have utility in treatment of cancers in which this pathway is inappropriately activated

Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at root s(NN)=2.76TeV

Peer reviewe

Identificación errónea de larga data de especímenes de rhinella icterica (spix, 1824) de Paraguay

En este trabajo reanalizamos especímenes de Paraguay asignados a la especie Rhinella icterica provenientes de los departamentos de Canindeyú y Amambay ubicados en la ecorregión del Cerrado. En base a la evaluación de caracteres morfológicos externos concluimos que los mismos deben ser asignados a la especie Rhinella cerradensis. Por otro lado, consideramos que no hay evidencia de que la especie R. icterica se encuentre en el país.In this work, we reanalyzed specimens from Paraguay assigned to the species Rhinella icterica from the departments of Canindeyú and Amambay located in the Cerrado ecoregion. Based on the evaluation of external morphological characters, we conclude that they should be assigned to the species Rhinella cerradensis. On the other hand, we consider that there is no evidence that Rhinella icterica is present in the country.– Neste trabalho reanalisamos espécimes do Paraguai atribuídos à espécie Rhinella icterica dos departamentos de Canindeyú e Amambay localizados na ecorregião do Cerrado. Com base na avaliação dos caracteres morfológicos externos, concluímos que eles devem ser atribuídos à espécie Rhinella cerradensis. Por outro lado, consideramos que não há evidências de que a espécie R. icterica seja encontrada no país.Fil: Caballero Gini, Andrea Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Brusquetti, Francisco. Instituto de Investigación Biológica del Paraguay; ParaguayFil: Martínez, Nicolas. Instituto de Investigación Biológica del Paraguay; ParaguayFil: Pereyra, Martín Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Baldo, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentin

Diversidad cariotípica en el género graomys thomas, 1916 (rodentia, cricetidae, sigmodontinae)

El género Graomys contiene cuatro especies y presenta una diversidad cariológica significativa. Graomys griseoflavus habita en la ecorregión del Desierto del Monte y muestra variaciones en el número diploide (2n) de 33 a 38 debido a translocaciones Robertsonianas, y en el número fundamental de brazos autosómicos (FNa) de 44 a 48 debido a inversiones. Graomys chacoensis se encuentra en las ecorregiones del Chaco y el Espinal, y tiene 2n=42 y FNa=44-46 debido a una inversión pericéntrica. Graomys domorum habita en la ecorregión de Yungas y en zonas de transición con el Chaco, y exhibe 2n=28 NFa=46, pero su cariotipo sólo se conoce por una representación esquemática para dos especímenes de Bolivia. El cariotipo de G. edithae no ha sido descrito. En este trabajo estudiamos 29 individuos de las tres primeras especies distribuidos en diferentes localidades, utilizando técnicas citogenéticas convencionales, diferenciales y mediciones cromosómicas. En G. griseoflavus identificamos los pares involucrados en las tres translocaciones Robertsonianas, apoyando un origen independiente, no secuencial de este polimorfismo. El área cercana a Mendoza alberga la mayor diversidad cromosómica de G. griseoflavus. El patrón de bandas y las medidas cromosómicas nos han permitido sugerir los posibles pares involucrados en las inversiones pericéntricas de G. griseoflavus y G. chacoensis. La presencia de heterocromatina indica variabilidad cromosómica adicional y una mayor complejidad de lo que se reconocía previamente. Los complementos cromosómicos de G. griseoflavus y G. chacoensis son muy similares. El cariotipo de G. domorum de Argentina difiere del informado en Bolivia y es el más divergentes dentro del género.The genus Graomys contains four species and presents signi cant karyological diversity. Graomys griseo avus, inhabiting mainly the Monte Desert ecoregion, shows variations in diploid number (2n) from 33 to 38 due to Robertsonian translocations and in fundamental number of autosomal arms (FNa) from 44 to 48 due to inversions. Graomys chacoensis, which occurs in the ecoregions of the Chaco and the Espinal, has 2n=42 and FNa=44-46 due to a pericentric inversion. Graomys domorum, which inhabits the Yungas ecoregion and the Yungas-Chaco transitional zones and exhibits 2n=28 and FNa=46, but its karyotype is known only by a schematic representation for two specimens from Bolivia. The karyotype of G. edithae has not yet been described. In this report, we studied 29 individuals of the three former species from di erent localities of their distribution, using conventional and di erential cytogenetic techniques and chromosome measurements. In G. griseo avus, we have identi ed the pairs involved in the three Robertsonian translocations, supporting an independent, not sequential origin of this polymorphism. The nearby area of Mendoza City showed the greatest chromosomal diversity for G. griseo avus. The banding pattern associated with the chromosomal measurements allowed us to suggest the possible pairs involved in the pericentric inversions of G. griseo avus and G. chacoensis. The presence of heterochromatin indicates more signi cant chromosomal variability and complexity than previously recognized. The chromosome complements of G. chacoensis and G. griseo avus are more similar to each other. The karyotype of G. domorum from Argentina di ers from the previously reported from Bolivia, and is the most divergent within the genus.Fil: de Cena, Romina Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Labaroni, Carolina Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Martínez, Juan José. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Baldo, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; ArgentinaFil: Ferro, Luis Ignacio. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; ArgentinaFil: Ojeda, Agustina Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Rodriguez, Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Lanzone, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentin

Amphibian parasites of the Order Dermocystida (Ichthyosporea): current knowledge, taxonomic review and new records from Brazil

Amphibian parasites of the Order Dermocystida (Ichthyosporea) are widespread pathogens known mainly from Europe and North America, which cause primarily a disease of skin and subcutaneous tissue in their hosts. The taxonomy of these organisms has been problematic given their conserved morphology, similar clinical disease and pathology. Currently recognized taxa belong to the three closely related genera, Amphibiocystidium, Amphibiothecum, and Rhinosporidium, whereas species of Dermocystidium and Sphaerothecum destruens include fish parasites. Here, we review the taxonomy of Dermocystida based on a molecular phylogenetic analysis, principally of amphibian parasites, including DNA sequences obtained from amphibian hosts collected in the central-eastern region of South America. A new taxonomic arrangement is proposed, which includes the designation of type material for Dermocystidium pusula, synonymization of Amphibiothecum with Dermocystidium, and the restriction of Amphibiocystidium to its type species A. ranae. We also review the taxonomic status of Dermosporidium hylarum until the present work included in the synonymy of the human and animal pathogen R. seeberi, and considered herein as a valid taxon, however. In addition, a new species of Sphaerothecum parasitic to amphibians is described, being the first record of this genus in the southern hemisphere and in an amphibian host.Fil: Borteiro, Claudio. Universidad de la República; Uruguay. Museo Nacional de Historia Natural; UruguayFil: Baldo, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; ArgentinaFil: Maronna, Maximiliano M.. Universidade de Sao Paulo; BrasilFil: Pontes Baêta Da Costa, Délio. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Sabbag, Ariadne Fares. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Kolenc, Francisco. Museo Nacional de Historia Natural; UruguayFil: Debat, Claudio Martínez. Universidad de la República; UruguayFil: Haddad, Célio F. B.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Cruz, Juan Carlos. Universidad de la República; UruguayFil: Verdes, José Manuel. Universidad de la República; UruguayFil: Ubilla, Martín. Universidad de la República; Urugua

Small variations in soil properties control fire-induced water repellency.

Fire induced soil water repellency (WR) is controlled by many different factors (temperature reached, amount and type of fuel, etc.). Soil properties may determine the occurrence and intensity of this property in burned soils. The objectives of this paper are to make advances in the study of soil properties as key factors controlling the behaviour of fire-induced WR, and to study the impact of pre-fire SOM content and SOM quality in fire-induced soil WR. In this research, experimental laboratory burnings were carried out using soil samples from different sites with different lithologies, soil types and plant species. Soil samples from the same site differ only in quantity and quality of soil organic matter, as they were collected from under different plant species. All soil samples were heated in a muffle furnace at 200, 250, 300 and 350 ºC without the addition of any fuel load. WR was measured using the water drop penetration time test (WDPT). The results showed significant differences between soil types and plant species, indicating that small differences in soil properties may act as key factors controlling the development and persistence of WR reached, with burned soil samples ranging from wettable to extremely water repellent. The main soil property controlling the response was texture, specifically sand content. The quality of organic matter was also observed to have an effect, since soil samples from the same site with similar organic matter contents, but collected from beneath different plant species, showed different WR values after burning.A repelência à água (WR) induzida no solo pelo fogo é uma propriedade controlada por diversos fatores (temperatura atingida, quantidade e tipo de combustível, etc.). Algumas propriedades podem determinar a presença e intensidade da WR nos solos afetados pelo fogo. O objetivo deste artigo é demonstrar os últimos avanços no estudo das propriedades do solo, como factores chave, que controlam o comportamento da hidrofobicidade induzida pelo fogo, o impacto do conteúdo de matéria orgânica pré-fogo e a qualidade da matéria orgânica em solos afetados por repelência pós-incêndio. Neste estudo, foram realizadas queimadas controladas em laboratório, utilizando amostras de solo de locais com diferentes substratos litológicos e com diferentes tipos de solo, colonizados por diferentes espécies vegetais. As amostras recolhidas em diferentes locais diferem nalgumas propriedades do solo, enquanto as amostras de solo recolhidas no mesmo local apenas diferem na quantidade e qualidade da matéria orgânica, dado que foram recolhidas em áreas colonizadas por diferentes espécies de plantas. Todas as amostras foram submetidas às temperaturas de 200, 250, 300 e 350 °C num forno. A WR foi medida através do teste da gota de água (WDPT). Os resultados mostraram diferenças significativas entre os tipos de solos e plantas estudadas. Observaram-se pequenas diferenças em algumas propriedades do solo, que podem atuar como fatores-chave que controlam o desenvolvimento e persistência da WR nos solos queimados, que variam entre o hidrofílico e o extremamente repelente à água. A propriedade que mais influencia o comportamento da WR é a textura, especialmente o teor em areia. Por outro lado, observou-se que a qualidade da matéria orgânica também afetou a WR, dado que em amostras de solo recolhidas no mesmo local e com conteúdo em matéria orgânica semelhante, mas recolhidas em solos colonizados por diferentes espécies de plantas, mostraram valores muito diferentes de repelência à água após a queimada.La repelencia al agua (WR) inducida por el fuego es una propiedad controlada por muchos factores diferentes (temperaturas alcanzadas, cantidad y tipo de combustible, etc.). Algunas propiedades del suelo pueden determinar la presencia y la intensidad de esta propiedad en los suelos quemados. Los objetivos principales son: avanzar en el estudio de la influencia de algunas propiedades clave en el control del comportamiento de la WR en suelos quemados, así como estudiar la influencia de la cantidad y la calidad de la materia orgánica del suelo en su desarrollo cuando es afectada por el calentamiento. En éste estudio, hemos realizado quemas controladas en laboratorio utilizando muestras de suelo de diferentes sitios con litologías y tipos de suelos diferentes y recogidas bajo distintas especies vegetales. Las muestras recogidas en diferentes sitios difieren en algunas propiedades del suelo, mientras que las muestras de suelo tomadas del mismo sitio sólo se diferencian en la cantidad y la calidad de la materia orgánica del suelo, ya que se recogieron bajo distintas especies de plantas. Todas las muestras de suelo se calentaron en horno de mufla a 200, 250, 300 y 350 ºC. La repelencia al agua se midió mediante el test del tiempo de penetración de la gota de agua (WDPT). Los resultados mostraron diferencias significativas entre los tipos de suelos y especies vegetales, y se comprobó que pequeñas diferencias en algunas propiedades del suelo pueden actuar como factores clave controlando el desarrollo y persistencia de la repelencia al agua, con muestras de suelo quemadas que variaban entre hidrofílicas a extremadamente repelentes al agua. La propiedad que principalmente controló el comportamiento de la repelencia al calentamiento fue la textura y más concretamente el contenido de arena. Por otro lado se observó que la calidad de la materia orgánica también afecta, ya que muestras de suelo de mismo sitio y con contenido de materia orgánica similar, pero tomadas bajo diferentes especies vegetales mostraron valores muy diferentes de repelencia al agua tras la quema

Anomalous evolution of the near-side jet peak shape in Pb–Pb collisions at √sNN = 2.76 TeV

The measurement of two-particle angular correlations is a powerful tool to study jet quenching in a pT region inaccessible by direct jet identification. In these measurements pseudorapidity (Δη) and azimuthal (Δφ) differences are used to extract the shape of the near-side peak formed by particles associated to a higher pT trigger particle (1<pT,trig< 8 GeV/c). A combined fit of the near-side peak and long-range correlations is applied to the data allowing the extraction of the centrality evolution of the peak shape in Pb-Pb collisions at sNN−−−√ = 2.76 TeV. A significant broadening of the peak in the Δη direction at low pT is found from peripheral to central collisions, which vanishes above 4 GeV/c, while in the Δφ direction the peak is almost independent of centrality. For the 10% most central collisions and 1<pT,assoc< 2 GeV/c, 1<pT,trig< 3 GeV/c a novel feature is observed: a depletion develops around the centre of the peak. The results are compared to pp collisions at the same centre of mass energy and to AMPT model simulations. The comparison to the investigated models suggests that the broadening and the development of the depletion is connected to the strength of radial and longitudinal flow