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San Sebastián de los Reyes, Spain

Olariaga I.,Swedish Museum of Natural History | Laskibar X.,Aranzadi Society of science | Holec J.,National Museum
Mycological Progress | Year: 2015

The large morphological variability of Tricholomopsis rutilans sensu lato is assessed through a detailed morphological study and analyses of the ITS-LSU regions. Our Maximum Likelihood and Bayesian analyses coding indel information show that T. rutilans is actually a species complex. Specimens of T. rutilans s.l. form five lineages, all of them characterized by having red-purple tones on the stipe, broadly ellipsoid to subglobose spores, and narrow pleurocystidia 4–7 μm broad. One of those lineages is described as the new species T. pteridicola, collected in the Western Pyrenees, featured by slender fruitbodies with pileus 7–28 mm in diameter, pale yellowish cream lamellae, and by the association with Pteridium aquilinum. Another lineage characterized by large basidiomata, and sometimes scarce to absent pleurocystidia, is identified as T. rutilans s. str. ITS-LSU sequence divergence between European and North American specimens of T. rutilans is high. To stabilize the use of the name T. rutilans, an epitype from Europe is proposed. Tricholomopsis rutilans var. splendidissima is reduced to synonymy with T. rutilans. The other two lineages, referred to as T. aff. rutilans 1 and T. aff. rutilans 2, are at present morphologically not distinguishable from T. rutilans, but appear to have abundant pleurocystidia. We conclude that further morphological and molecular studies are needed in order to formally describe them. © 2015, German Mycological Society and Springer-Verlag Berlin Heidelberg.

Melero Y.,University of Barcelona | Santulli G.,University of Barcelona | Gomez A.,TRAGSATEC | Gosalbez J.,University of Barcelona | And 2 more authors.
Mammalian Biology | Year: 2012

We studied the morphology of American mink Neovison vison in five out of the six introduced populations in Spain. The spatial and temporal variation of body weight (BW), body length (BL), tail length, hind-foot length and ear length were analysed. Temporal trends in BW and BL in relation to years since mink introduction were also analyzed. In addition, we tested the effect of sex, age (juvenile, subadult and adult) and age-sex interaction, on each parameter. Morphological parameters differed between populations, illustrating the high variability of body size of American mink in different environments, and the phenotypic plasticity of the species. Annual variations were synchronized between populations, suggesting a large-scale effect on all of them. BW and BL showed a decreasing trend in both males and females in relation to years since introduction. This decrease may be related to mink's diet. Differences in sex and age were found, pointing to sexual dimorphism in adults, subadults and juveniles. The dimorphism in non-adult individuals suggests that subadult males may have a competitive advantage from subadult females in feeding and/or hunting on bigger prey from an early age (resource partitioning hypothesis). © 2012 Deutsche Gesellschaft für Säugetierkunde.

Castanos J.,University of the Basque Country | Zuluaga M.C.,University of the Basque Country | Ortega L.T.,University of the Basque Country | Murelaga X.,University of the Basque Country | And 3 more authors.
Quaternary International | Year: 2014

The Kiputz IX site records climatic variations during the Late Pleistocene since it represents a continuous time interval record (ca. 25-13ka cal BP). Carbon and nitrogen stable isotopes from the bone collagen of herbivores (Rangifer tarandus, Cervus elaphus, and Bison priscus) were analysed to establish environmental and climatic conditions in the northern Iberian Peninsula. Faunal distribution over time represents a response to climatic variations, showing inverse patterns with reindeer and bison profusion during cold periods and red deer abundance during warmer times. The increase in reindeer δ15N values during stadial GS-2 appears to be greater in magnitude than in continental Europe and reflects drier, warmer climatic conditions. The δ13C values of red deer suggest more humid environmental conditions south of the Pyrenees. During interstadial GS-1 the climatic conditions of southern Pyrenees appear to be analogous to that of northern Pyrenees regions. © 2013 Elsevier Ltd and INQUA.

Rodriguez-Refojos C.,Aranzadi Society of science | Zuberogoitia I.,Icarus | Rosalino L.M.,University of Lisbon | Santos M.J.,Sebero Otxoa 45 | And 3 more authors.
Folia Zoologica | Year: 2011

Animals' body size varies intra-specifically and geographically among populations, and many species (including small carnivores) show sexual dimorphism and larger individuals (lower superficial area/volume ratio) inhabiting cooler climates complying with Bergman's rule. In the present study we analyse data of common genets wild-caught in three different regions of the Iberian Peninsula, searching for variations in size and weight between males and females, testing for sexual dimorphism, as well as for micro-scale geographical variations among populations in biometrics and sexual dimorphism. We use field measurements such as length (body and tail) and weight, to characterise the three populations in the Iberian Peninsula. Our results show that Iberian genets present significant differences between sexes, although sexual dimorphism is lower than in other small carnivores, and that they comply with Rensch's rule, males size showing greater variation. Iberian genets also follow the Bergman's rule, being bigger and heavier in colder and northern regions. Although we have detected morphometric differences among studied populations, sexual dimorphism indexes varied little. We discuss our results in the light of the different hypotheses given to explain the sexual dimorphism in carnivores, trying to identify the mechanisms that might play a role in the dimorphism of genets.

Crespo A.,Aranzadi Society of science | Mazuelas D.,Environment Resources Inc.
Parasites and Vectors | Year: 2015

Background: The prevalence of Rickettsia spp. in Ixodes arboricola ticks collected from birds in two locations in the North of Spain from 2011 to 2013 was studied. Findings: The detection of the bacteria in 54 DNA extracts of I. arboricola was performed by PCR targeting an ompA fragment gene. The 94.4% of the samples yielded positive results and the nucleotide sequences were homologous (100% identity) to 'Candidatus Rickettsia vini'. Conclusion: The high rate of infection suggests that 'Ca. R. vini' is a common endosymbiont of I. arboricola. © 2015 Palomar et al.; licensee BioMed Central.

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