About
89
Publications
20,164
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
623
Citations
Introduction
Publications
Publications (89)
Salinomys delicatus Braun & Mares, 1995 is a sigmodontine rodent endemic to perisaline environments in west-central Argentina. It is currently considered to be a Vulnerable species due to its patchy distribution and the loss of optimal habitats caused by intensive anthropogenic activities. In this work, we document the first record for this species...
Population density is a potentially significant determinant of social organization, with high densities often expected to result in greater spatial and social contact among conspecifics. As part of ongoing efforts to document behavioral diversity among tuco-tucos (Rodentia: Ctenomyidae: Ctenomys), we characterized the social organization of a popul...
Dryland ecosystems are among the most widespread biomes on Earth and sustain nearly 40% of the global human population. Knowledge on drylands throughout the world has come from diverse disciplinary fields including natural and social sciences. The use of quantitative tools, such as science mapping or bibliometric analysis, may help to explore the s...
The genus Ctenomys Blainville, 1826 includes 68 living species of small to medium-sized (100–1200 g) caviomorph rodents of subterranean habits. During the last decade, this genus has been the subject of numerous taxonomic studies, including the description of new species and the proposal of novel synonyms. Based on phylogenetic analysis of mitochon...
Barn owls are the most widely distributed group of owls in the world and are among the most common accumulators of small vertebrate remains at archeological and paleontological sites. Despite its importance as a bone remains accumulator and predictor of paleoenvironmental conditions due to its generalist habits, the vertebrate prey of this raptor h...
Environmental heterogeneity shapes the traits of natural populations, including space use and burrowing behavior. We studied the red viscacha rat ( Tympanoctomys barrerae ), a semifossorial rodent with patchy distribution in drylands of west‐central Argentina, to provide ecological data on habitat and burrow features of this specialist species. We...
The Andes are known to be one of the most species-rich regions on Earth, with their origination promoting formation of new habitats and acting as climatic barriers. This orogenic event was structured latitudinally with 3 major segments having different formation times and with different environmental and historical conditions. The Andean region has...
Rodentia has a high species number and chromosomal variability. The South American genus Akodon is one of the most speciose muroids, with more than 40 species included in several species groups. Here, we characterize cytogenetically specimens of Akodon from central-western Argentina. Subsequently, we reviewed and analyzed the cytogenetic data for t...
‘Rewilding’ is a nature conservation strategy gaining prominence worldwide. Established in the Northern Hemisphere, rewilding initiatives have increasingly been proposed in Argentina, but their relative merits, feasibility of implementation and accountability have lacked adequate analysis and discussion. Recently, 125
scientists and practitioners w...
The genus Graomys contains four species and presents significant karyological diversity. Graomys griseoflavus, inhabiting mainly the Monte Desert ecoregion, shows variation 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, w...
The genus Ctenomys of subterranean rodents is one of the most species-rich genera of Mammalia, with 66 living species currently recognized. However, the taxonomy of the genus is dynamic with several new species and new synonymies proposed during the last decade. One of the species groups that have undergone more changes in contents in the last year...
En los últimos años se han desarrollado en Argentina distintas intervenciones relacionadas con el rewilding (o re-asilvestramiento), abarcando una variedad de especies (e.g., grandes carnívoros, ungulados, psitácidos) y ecorregiones (e.g., Chaco Húmedo y Seco, Estepa Patagónica). El reasilvestramiento es definido como una estrategia aplicada en el...
Salinomys delicatus Braun & Mares, 1995 is a sigmodontine rodent endemic to perisaline environments
in west-central Argentina. It is currently considered to be a Vulnerable species due to its patchy distribution and
the loss of optimal habitats caused by intensive anthropogenic activities. In this work, we document the first record for this species...
The genus Andalgalomys Williams and Mares, 1978 includes three species of small phyllotine rodents: Andalgalomys olrogi Williams and Mares, 1978; Andalgalomys pearsoni (Myers, 1977); and Andalgalomys roigi Mares and Braun, 1996. These mice are distributed from southeastern Bolivia and western Paraguay to west-central Argentina, occupying mostly sem...
RED LIST ASSESSMENT OF THE MAMMALS OF ARGENTINA 2019: SUMMARY AND ANALYSIS OF THREATS. Assessing the extinction risk of species has become an important decision tool for the implementation of species conservation policies. In this work we summarize the result of the latest oficial categorization of the mammals of Argentina with emphasis on the thre...
En 2021, Jayat et al. propusimos una nueva especie de roedor sigmodontino, nombrada Phyllotis pehuenche, para las poblaciones del complejo de especies de Phyllotis xanthopygus del sudoeste de la provincia de Mendoza y el oeste de la provincia de Neuquén, Argentina. La descripción formal de la especie, publicada en un material suplementario electrón...
The Ctenomys population from Anillaco, La Rioja Province, Argentina has been the subject of detailed studies of circadian rhythms, vocalization, ecology and spatial dynamics. However, the taxonomy and systematics of this population as well as populations of Ctenomys inhabiting Andean areas of this province is unknown. In this study, we present the...
Comparative studies of closely related species provide a powerful means of identifying the ecological and
demographic factors associated with variation in mammalian social systems. Although most members of the
subterranean rodent genus Ctenomys are thought to be solitary, the highland tuco-tuco (C. opimus) is group
living, meaning that multiple adu...
Based on previously published molecular (mitochondrial) and herein provided morphological (qualitative and quantitative data) evidence, we describe a new species of leaf-eared mouse of the genus Phyllotis. The new species is morphometrically distinct when compared with other phylogenetically or geographically close species of Phyllotis, showing sev...
Aim:
Comprehensive, global information on species' occurrences is an essential biodiversity variable and central to a range of applications in ecology, evolution, biogeography and conservation. Expert range maps often represent a species' only available distributional information and play an increasing role in conservation assessments and macroeco...
Rodents are an important component of South America fauna. Their high diversity has motivated researchers to continually review their taxonomy, genetic diversity, species limits, and phylogenetic relationships. We apply DNA‐barcodes for assessing the taxonomic and genetic diversity in the two major lineages of South American rodents: caviomorphs an...
Phyllotis Waterhouse 1837 is one of the most studied genera of South American cricetid rodents. As currently understood, it includes 20 small to medium-sized species of predominantly rocky habitats. Among them, populations of the yellow-rumped leaf-eared
mouse, traditionally referred to P. xanthopygus (Waterhouse 1837), are the most widely distribu...
Molecular genetic data are increasingly used to assist in species identification and delimitation, and provide a powerful tool to detect conservation units (population/s of an organism considered to be different for conservation purposes). In combination with distributional and ecological information, molecular genetic data can contribute to establ...
The genus Euneomys is mostly distributed in the open environments of the central and southern Andes, adjacent Patagonian steppes of Argentina and Chile, and in several islands of the Tierra del Fuego Archipelago. This genus includes three living species: Euneomys chinchilloides, Euneomys fossor, and Euneomys mordax. Euneomys fossor is a poorly know...
The leaf-eared mouse, Phyllotis xanthopygus (Waterhouse 1837) is a widely distributed sigmodontine rodent in South America, with populations ranging from central Peru to southern Argentina and Chile. Previous morphological and molecular contributions
have suggested that P. xanthopygus represents a species complex. In order to characterize and discl...
Objectives Materials and Methods Results • To quantify habitat use, movements and spatial distribution of the red viscacha rat H1: Burrow characteristics and densities would be affected by distribution and physical features of the habitat H2: Space use of the species is associated with habitat heterogeneity and sex H3: Spatial distribution of the b...
Viscacha rats (genus Tympanoctomys Yepes, 1942) are ecologically, physiologically, and behaviorally unusual octodontid rodents endemic to the Monte and Patagonian desert biomes of Argentina. The geographic ranges of the different species of Tympanoctomys have been described in general terms but have not been associated with spatial and climate data...
Background
Leptospirosis is a zoonotic disease that can be transmitted by contact with the urine of infected mammals. Rodents play a mayor role in the transmission of leptospires to humans. The province of Santa Fe reports the greatest number of cases in Argentina. Yet, in this region, there are still knowledge gaps regarding the diversity of roden...
Rodents are a very diverse group with large chromosome variability. One of the most species rich linage in the Neotropics is the Sigmodontinae. Among them, the tribe Abrotrichini was recently defined and its taxonomy and phylogeny were mostly elucidated through molecular and morphological evidence. Meanwhile, chromosome data were only secondarily u...
Tympanoctomys barrerae. Rata vizcacha colorada. Cita sugerida:
Ojeda, Agustina A.; Tarquino-Carbonell, Andrea del Pilar (2019). Tympanoctomys barrerae. Categorización 2019 de los mamíferos de Argentina según su riesgo de extinción. Lista Roja de los mamíferos de Argentina. Versión digital: http://cma.sarem.org.ar
Akodon oenos, a nominal form with type locality in northern Mendoza province, Argentina, has an intricate taxonomic history. Recently, it was considered a junior synonym of Akodon spegazzinii on the basis of morphological similarities of one individual captured in southern Mendoza with specimens belonging to the type series of A. oenos, plus the ge...
The leaf-eared mice of the genus Phyllotis (Cricetidae, Phyllotini) encompasses at least 20 species of medium-sized Neo-tropical rodents mostly distributed throughout the Andean region. Its limits and contents were reviewed by several au-thors, based both on morphological and molecular data. However, no integrative approaches were conducted based o...
La organización espacial y utilización de hábitats por las especies son temas centrales en ecología. En esta revisión se analiza la distribución espacial a diferentes resoluciones de áreas de estudio (multiescala) en 6 familias de roedores subterráneos y semifosoriales de biomas de desierto del continente americano, africano y australiano. Se reali...
This contribution is a tribute to José Yepes on the 75th anniversary of his description of the genus
Tympanoctomys, and the 90th anniversary of his admission to the Argentine Museum of Natural Sciences
“Bernardino Rivadavia”. Viscacha rats are the epitome of South American rodents adapted to desert habitats, and
are a true model, not only to presen...
The genome of the red vizcacha rat (Rodentia, Octodontidae, Tympanoctomys barrerae) is the largest of all mammals, and about double the size of their close relative, the mountain vizcacha rat Octomys mimax, even though the lineages that gave rise to these species diverged from each other only about 5 Ma. The mechanism for this rapid genome expansio...
Arid ecosystems represent heterogeneous scenarios, mainly determining the distribution of resources and species. Its heterogeneity reflects different scales for variations in topography, climate, precipitation and vegetation. Faced with habitat fragmentation, is necessary inferring which factors affect small mammals dynamics. Red Viscacha Rat is en...
Habitat partitioning is considered one of the main mechanisms of coexistence among small mammals. This is especially evident in arid environments where resources are particularly scarce. Habitat characteristics such as vegetation heterogeneity and complexity are expected to increase species coexistence, increasing the number of microhabitats that c...
Under the DNA Barcode initiative, we used the mitochondrial locus cytochrome c oxidase I to test if this molecular marker would reliably distinguish among lizard species of the patagonicus clade of Phymaturus. Using 18 described species and two populations of unidentified species, we calculated intra- and interpopulation genetic distances for all o...
Los modelos predictivos de distribución de roedores en paisajes áridos heterogéneos de Argentina es un tema de incipiente desarrollo. Dentro de los octodóntidos, Tympanoctomys es un especialista del desierto, presenta adaptaciones a los ambientes xéricos y distribución restringida y en parches. El objetivo del estudio fue identificar la distribució...
Caviomorph rodents were one of the earliest colonizers of the Neotropics and are now conspicuous inhabitants there. The aim of this chapter is to provide a global synthesis of the caviomorphs, their phylogeny, and biogeographical and ecological diversification. We provide a general introduction to the radiation of major clades and phylogenetic rela...
Hystricognath rodents probably arrived from Africa and diversified rapidly into major clades during the Eocene-Early Oligocene. Caviomorph rodents radiated in different directions involving body size, ecomorphological, physiological and behavioral traits which make them convergent to several groups of mammals. The aim of this chapter is to analyze...
Euneomys is a genus of sigmodontine rodent endemic to South America, distributed along the Andes of
Argentina and Chile and in adjoining Patagonian steppe. Here, we studied specimens of Euneomys from different localities in the Central Andes, Mendoza Province, Argentina. Karyotypic analyses confirm the presence of a new karyomorph of Euneomys chinc...
Hystricognath rodents probably arrived from Africa and diversified rapidly into major clades during the Eocene-Early Oligocene. Caviomorph rodents radiated in different directions involving body size, ecomorphological, physiological and behavioral traits which make them convergent to several groups of mammals. The aim of this chapter is to analyze...
Phyllotis xanthopygus (Waterhouse, 1837) is an Andean rodent endemic to South America. Despite its
wide geographical distribution in Argentina, few individuals have been studied on the cytogenetic level
and only through conventional staining. In this work, chromosome characterization of Argentine samples
of this species was performed using solid st...
Genetic variability in rodents is extremely wide and a fruitful field of research. Graomys griseoflavus is a phyllotine rodent, endemic to South America, polymorphic for Rb rearrangements. However, few individuals and populations were studied cytogenetically to date, considering its wide distribution. We present and compare chromosomal data from Me...
The New World hystricognath rodents (Caviomorpha) probably came from Africa and diversified into major clades during the Eocene-Oligocene. In this presentation we address the biogeographical and ecological diversification of caviomorphs within a recent phylogenetic framework. Our main results show that: a) The Amazonia and the Atlantic forest are t...
Caviomorph rodents represent one of the most distinctive groups of mammals in southern South America drylands; they colonized South America from Africa via trans-oceanic dispersions in the Eocene (40–50 Ma) and underwent an extraordinary ecological radiation after their arrival, thus making this group of great interest for biogeographic and evoluti...
Caviomorph rodents represent one of the most distinctive groups of mammals in southern South America drylands; they colonized South America from Africa via trans-oceanic dispersions in the Eocene (40–50 Ma) and underwent an extraordinary ecological radiation after their arrival, thus making this group of great interest for biogeographic and evoluti...
Subterranean tuco-tucos of the genus Ctenomys are caviomorph rodents comprising a complex of over 50 nominal species found in the southern half of South America. The validity of several nominal forms awaits a proper assessment. The population of Ctenomys from Ñacuñán Biosphere Reserve (Mendoza, Argentina) has been classically considered to represen...
The delicate mouse (Salinomys delicatus) is a small rodent endemic of Argentina. It has been considered vulnerable to extinction because of its restricted and patchy distribution, small population size and specialization on salty habitats. Besides its morphological and physiological adaptations to survive in arid and salty habitats, there is still...
The delicate mouse (Salinomys delicatus) is a small rodent endemic of Argentina. It has been considered vulnerable to extinction because of its restricted and patchy distribution, small population size and specialization on salty habitats. Besides its morphological and physiological adaptations to survive in arid and salty habitats, there is still...
Salinomys delicatus is considered a rare species due to its restricted and patchy distribution, poor records and low abundances. It is also the phyllotine with the lowest known diploid chromosome number (2n = 18), however its sex chromosome system has never been described. Here, we studied the chromosomes of six females and three males with bands G...
Patterns of evolution and systematics of sigmodontine rodents are matters of continuous revision and
debate. The silky mouse, Eligmodontia, is a phyllotine rodent adapted to arid environments. Chromosomal
and molecular data have identified six species in this genus. Among these E. puerulus and E. moreni are
sister taxa from the high Andean and lowl...
To increase our understanding of the speciation process occurred in the sibling species Graomys griseoflavus and Graomys centralis, a phylogeographic study was conducted based on sequences of a hypervariable segment of the mtDNA D-loop region. The resulting haplotype phylogenetic network showed two well-defined clusters, one for each species. The c...
The red viscacha rat, Tympanoctomys barrerae, is an octodontid rodent endemic to the arid west-central and
southern regions of Argentina. It is solitary, lives in complex burrows built in soft soil, and occurs at low population densities in patches associated with salt basins and sand dunes in lowland habitats of the Monte and Patagonia deserts. Th...
The red vizcacha rat (Tympanoctomys barrerae) is an octodontid which has adapted to the aridity of the Monte desert biome of Argentina (Ojeda et al. 1996, 1999, Mares et al. 1997). Known from only 11 disjunct popu-lations, its present distributional range extends from Ischigualasto National Park (La Rioja province, 308059 S, 678569 W) to the Añ elo...