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Psilocybe cubensis es una especie con propiedades alucinógenas utilizada tradicionalmente por diversas comunidades originarias, pero más recientemente, utilizada con fines recreativos, a pesar de su ilegalidad. Es una ...

Agricultural landscapes support large amphibian populations because they provide habitat for many species, although agriculture affects amphibians through various mechanisms. Pollution with agrochemicals is the major thr...

When doing a bootstrap analysis with a single tree saved per pseudoreplicate, biased search algorithms may influence support values more than actual properties of the data set. Two methods commonly used for finding phylo...

The recognition of areas of endemism (AEs) is important for conservation biology and biogeographical regionalization. Our objective was to quantitatively identify AEs and distributional congruence patterns of native rode...

The Miridae (Hemiptera: Heteroptera) are one of the most species rich families of insects, with about 11 100 described species. Mirinae is the largest subfamily and its endemism becomes evident at the tribal level and be...

Morphology of the shell, radula, jaw, anatomy and sculpture of the inner wall of the reproductive system are described and compared for three species belonging to the Bostryx tortoranus species complex. On the basis of t...

Science carried out in South America has experienced a major rise in the levels of productivity and impact during the last decade. The continuity of this process depends upon strong policy decisions of personnel training...

Tolerance to extreme temperatures, thermal limits, and the mechanisms of thermoregulation are related to internal functions of insects and partly define their ecological niche. We study the association between daily acti...

Arbuscular mycorrhizal fungi (AMF) are symbiotic fungi that associate with the vast majority of terrestrial plants. Among non-vascular plants, while AMF associa tions are well-documented in liverworts and hornworts, ther...

The design of novel delivery systems to treat vaginal fungalinfections is a topic of high interest. Chitosan, being itselfantimicrobial and having good mucoadhesive properties, is an excellentcandidate as a delivery matr...

En el marco del estudio de las cadenas operativas de manufactura cerámica para dos sectores de la puna de Jujuy, para tiempos prehispánicos tardíos y coloniales, en este trabajo se presentan las evidencias vinculadas ...

Aphyocharax anisitsi es registrado por primera vez en la Cuenca alta del Río Bermejo, Argentina, en las provincias de Salta y Jujuy. Esto representa una extensión de la distribución conocida de aproximadamente 600 km....

In few groups of parasites have the patterns of distribution been studied using quantitative methods, even though, the study of these organisms indirectly provides information on the biogeographic history of their hosts,...

Fluvial basins located on the NE side of the Sierra de Aconquija and facing the Tafí valley (NW Argentina) enable a study of the sedimentary records of valleys and alluvial fans that have been subject to glacial and per...

The geomorphological map of the alluvial fans in the Colalao del Valle-Quilmes area represents the first detailed map of the Santa María Valley, Northwest Argentina. The map was made using photointerpretation of aerial ...

Dihydroxychalcones as well as other metabolites synthesized via the phenylpropanoid pathway have a wide range of biological activities. Although this class of phenolic compounds is found in very large amounts in some tis...

Intra-specific color variation is often underestimated by researchers, and among mammalian species, intra-specific differences in coloration are poorly documented for most species. The main goal of this study was to appl...

Se estudiaron las especies de Leptohyphidae presentes en la selva de neblina de las yungas. Se conocen, de esta región, dieciocho especies en cinco géneros, incluyendo los siguientes nuevos registros: Leptohyphes linit...

Leposternon microcephalum is a terrestrial amphisbaenid found in open and semi-open habitats in Bolivia, Paraguay, Argentina, Uruguay, and Brazil (Pérez and Ribeiro 2008. Check List 4:291–294). They are reported to be...

Introducción y objetivos: Lewinskya es un género incluido en la familia Orthotrichaceae. Se caracteriza por agrupar especies autoicas con estomas superficiales. A partir de especímenes recolectados en la provincia de ...

Presentamos una síntesis de lo que conocemos hasta el momento sobre las actividades mineras y metalúrgicas prehispánicas desarrolladas en el territorio de la actual provincia de Jujuy (Argentina). Para ello, se analiz...

Agricultural expansion threatens biodiversity due to habitat loss and fragmentation. In the Gran Chaco, a global deforestation hotspot, rampant cropland and pasture expansion raise concerns about the sustainability of th...

Uplift in the broken Andean foreland of the Argentine Santa Bárbara System (SBS) is associated with the contractional reactivationof basement anisotropies, similar to those reported from the thick-skinned Cretaceous-Eoc...

Four mosquito species—Anopheles (Nyssorhynchus) galvaoi, An. (Anopheles) mediopunctatus, Culex (Culex) lahillei, and Uranotaenia (Uranotaenia) geométrica—were recorded for the first time in northwestern Argentina. I...