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The article "TOWARDS A NEW CATEGORIZATION OF ARGENTINA'S MAMMALS" informs about the categorization of mammals in Argentina according to their risk of extinction. The "Red List" published in 2019 by SAREM and the National Environment Secretariat updated the taxonomy and distribution of mammal species in Argentina, as well as the threats they face. It was found that 24% of mammals in Argentina are endangered. This categorization has influenced other South American countries and has driven research on introduced mammals in the country. A new categorization will be carried out in 2024, maintaining principles of plurality, participation, technical robustness, and free dissemination of results. A procedure from the IUCN will also be incorporated to classify introduced species, and a new web platform will be developed to present the data. SAREM plays an important role in the knowledge and management of mammals in Argentina. [Extracted from the article]

Copyright of Journal of Neotropical Mammalogy / Mastozoologia Neotropical is the property of Sociedad Argentina para el Estudio de los Mamiferos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Therya is the property of Asociacion Mexicana de Mastozoologia, A. C. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The mammalian fauna of Argentina includes 411 living and recently extinct native species (divided into 186 genera, 47 families and 12 orders), as well as 21 introduced and feral species. This contribution presents an analysis of the historical and recent trends in the systematic knowledge of the mammals of Argentina and some geographical aspects of this process. Overall, the accumulation curves for new species are similar to those recorded for neotropical mammals as a whole. The taxonomic work was initially carried out by researchers from the northern hemisphere, but at present it is mainly carried out by Latin American scientists. In the last 40 years, 39 species were described whose distribution includes Argentina, almost at the rate of one per year. Thirty-one of these new species are endemic to Argentina and have relatively restricted distributions. The ecoregions where more new species are registered correspond to the Austral Yungas, the Monte (High and Low) and the Dry Chaco, in west-central, central and northwestern Argentina; paradoxically, some of these ecoregions are among the least explored in our country. Finally, due to its centrality in taxonomic work, some issues related to the national mammal collections are discussed. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Neotropical Mammalogy / Mastozoologia Neotropical is the property of Sociedad Argentina para el Estudio de los Mamiferos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sigmodontine rodents, with 86 genera and ~430 living species, constitute one of the most successful radiations of Neotropical mammals. In this contribution, we studied the distributional ranges of 108 sigmodontine species in Argentina. Our objectives were (i) to establish geographical patterns of species richness and endemism, and (ii) to evaluate the regional conservation status of these taxa. We constructed a minimum convex polygon for each species, using information from literature and biological collections. Individual maps were superimposed on a map of Argentina divided into cells of 25 km on each side. For each cell, we calculated the species richness, which varied between 1 and 21 species, and its degree of endemism, which fluctuated between 0.001 and 3.28. There were 30 species of sigmodontine rodents distributed almost exclusively in Argentina, most of them restricted to forested areas (Southern Andean Yungas) or to arid and semiarid environments (High and Low Monte and Patagonian Steppe). Areas with high species richness and endemism scores corresponded grossly with the Southern Andean Yungas, the Humid Chaco plus the Paraná flooded savannas, the Alto Parana Atlantic forests plus the Araucaria moist forests, the High Monte and the ecotone between the Patagonian steppe and the Valdivian temperate forests. A reassessment of the conservation status of sigmodontine rodents distributed in Argentina retrieved 2 extinct species, 7 endangered, 7 vulnerable, 6 near threatened and 13 data deficient. These numbers suggest a much more serious situation than the expressed by previous evaluations, highlighting the urgent need to establish conservation measures for the protection of this group. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Neotropical Mammalogy / Mastozoologia Neotropical is the property of Sociedad Argentina para el Estudio de los Mamiferos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We present a revised checklist of the mammals of Argentina, incorporating recent taxonomical changes and new records of mammals for the country produced since the publication of a previous list in 2006. We recordered 409 native species, corresponding to 181 genera, 46 families and 12 orders, plus 23 introduced taxa with wild populations. [ABSTRACT FROM AUTHOR]

Argentina is said to support one or two species of the genus Dasyprocta, depending on the authors. In this paper we present a qualitative and quantitative morphological analysis of the status of this taxon at the southern end of its range (Argentina, Bolivia and Paraguay). Principal component analysis, "size free" discriminant analysis, and differences in external coloration and in the cranial architecture suggest that individuals of Paraguay and northeastern Argentina (general coloration yellowish, nasofrontal suture usually W-shaped) represent one biological species, distinct from those of central Bolivia and northwestern Argentina (general coloration reddish, nasofrontal suture generally U-shaped). Given the limited number of individuals studied, resolution of the taxonomic status of populations in northwest Argentina with respect to those from central and southern Bolivia is subject to the results of further studies. [ABSTRACT FROM AUTHOR]

The 2 known species of the phyllotine rodent Tapecomys, the typical, Tapecomys primus Anderson and Yates, 2000 and Tapecomys wolffsohni (Thomas, 1902), have been cited for Argentina, and reported to be sympatric in 1 locality in the Yungas of Jujuy. A review of these materials suggest that the reference for T. wolffsohni is incorrect. In this context, only 1 species--T. primus--is present in 4 localities in the montane forests of Jujuy. A record for T. wolffsohni from 1 locality in Salta, is discussed based on a critical assessment of the morphological variation of these species. Currently it is not possible to confirm that T. wolffsohni inhabits the country. [ABSTRACT FROM AUTHOR]

We studied the alpha taxonomy of Abrothrix longipilis (Waterhouse, 1837), one of the most widely distributed and abundant Abrotrichini along the southern portion of Argentina and Chile. We conducted a qualitative (6 discrete characters) and quantitative (18 skull and dental measurements) morphological analysis of 477 adult specimens, grouped first by geographical criteria and later by membership to the clades defined in a previous phylogeographical study based on 2 molecular markers. Multivariate analyses (principal component analysis, discriminant analyses) suggested that in its current conception A. longipilis is a species-complex that includes at least two nominal taxa, A. longipilis stricto sensu, here restricted to Central Chile, and A. hirta (Thomas, 1895), distributed in southern Chile and southwestern Argentina. Populations of A. hirta showed a moderate correspondence between phylogeographic and phenotypic patterns. Tentatively, we considered that general size in A. hirta is mostly linked to environmental conditions (with larger individuals in forested areas, under high primary productivity conditions and the smaller ones in arid environments of low productivity) rather than to their inclusion in different clades. Under this scenario, morphological differentiation was probably driven by differential selection across a sharp ecological gradient, in spite of gene flow (divergence-with-gene-flow model). [ABSTRACT FROM AUTHOR]

Copyright of Journal of Neotropical Mammalogy / Mastozoologia Neotropical is the property of Sociedad Argentina para el Estudio de los Mamiferos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article reports on research findings regarding rodent remains collected in the Reserva Provincial Geológica Laguna Azul with the use of six species of Cricetidae and one Ctenomyidae in Argentina.

We studied a large accumulation of micromammals and other small vertebrates (Number of Identified Specimens = 2,754) from the archeotogical site Quebrada del Real 1, Córdoba Province, Argentina. The samples were dominated by caviomorph rodents of the families Caviidae and Ctenomyidae. These taxa are relatively large (200-700 g), with colonial or gregarious habits, predictable location, and easy to exploit as a resource. The taphonomic research suggests that this accumulation was largely made by human activities related to the consumption of these animals. The evidence includes the presence of cut marks, especially in mandibles and limb bones, and a differential pattern of thermal alteration mostly restricted to the distal portions of tibiae. In a regional view, the evidence suggests that the implementation of a broad spectrum diet is perhaps not exclusively a Late Holocene process but extended at least to the Middle-Late Holocene boundary (ca. 3000 years BP). [ABSTRACT FROM AUTHOR]