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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...

The potential risk areas for emerging or reemerging diseases are determined by the presence, abundance, and distribution of mosquitoes. Here new records and geographical distribution extension of mosquito species in phyt...

Terrestrial Triassic assemblages are an important component of the heritage of Argentina, particularly because of their diverse record of fossil vertebrates. Triassic basins from western Argentina have a good representat...

Anurans exhibit diverse locomotor modes and are found in a wide variety of habitats. Furthermore, despite speciesspecific preferences, several anurans can explore unusual habitats or substrates. This is the case of Thoro...

Incomplete data sampling, bias, and like properties of distribution datasets that potentially introduce uncertainty in biogeographical analyses and blur biogeographical patterns; therefore, it is important to understand ...

Se presentan datos sobre una metodología de patrimonio geológico que pretende valorizar a los depósitos costeros (?beachrocks?, paleoacantilados y cordones litorales) del golfo San Matías del Pleistoceno Tardío. El ...

When biodiversity conservation of noncharismatic species is a priority, local people perception and value attributed to species are of vital importance. The big colony of bats (Tadarida brasiliensis) in the Escaba dam lo...

In this study, we analyzed peripheral nerve anomalies in 15 anuran species spanning multiple developmental stages. Anatomical examinations focused on both the central nervous system—including the olfactory bulbs, telen...

El Tersina (Tersina viridis) se distribuye desde Panamá hasta la provincia de Misiones en Argentina (Schaefer 1953, Short 1975, Ridgely & Tudor 2009). Sin embargo,el comportamiento errático que muestra a menudo esta es...

The decision of when and how to escape result crucial for animals because it can result in an interruption to contribute to their fitness. In the present study, we analysed whether speed attack, sex and type of refuge in...

Introduction: In recent decades, Caribbean coral reefs have lost many vital marine species due to diseases. The well-documented mass mortality event of the long-spined black sea urchin Diadema antillarum in the early 198...

In reptiles, many lipid reserve structures were recognized, and different patterns of storage and utilization of lipids have been identified. In this study, a population of Liolaemus koslowskyi was studied to analyze the...