BATS OF THE ARGENTINE YUNGAS: A SYSTEMATIC AND DISTRIBUTIONAL ANALYSIS

In this study we analyze the composition of bat species of the Argentine Yungas, where 39 species have been recorded, number that indicates a high diversity of bats for the region compared with the total number of species in the country (66% of the species from Argentina). For comparative purposes we have incorporated in the analysis a revision of the species of the Bolivian Yungas. Since the mid-1970's, intensive field studies and surveys have been carried out in numerous localities of the Yungas in Argentina. The information obtained from personal collecting, plus the examination of museum specimens and literature records, allowed us to examine a total of 1682 specimens. One noctilionid, 12 phyllostomids, 13 vespertilionids, and 13 molossids were recorded in the area. For every species we include the specimens examined, additional records, distribution, reproduction and also provide additional comments related to the biology of the species observed by us during fieldwork studies. Biogeographical analyses were made considering the presence or absence of each species by degree of latitude along latitudinal gradients. The Yungas of Argentina was also compared with that of Bolivia and with other phytogeographic provinces, such as Chaco, Monte, Andean, and Paranaense regions, located at the same latitudinal range as the Yungas in Argentina.En el presente estudio se analiza la composición de especies de murciélagos de las Yungas de la Argentina, donde 39 especies han sido registradas, lo que indica una diversidad alta (66% de las especies de Argentina) comparada con el total de especies que habitan el país. A modo de comparación se ha analizado también las especies que habitan las Yungas de Bolivia. Desde mediados de los años '70 se han desarrollado estudios intensivos de campo a numerosas localidades de las Yungas en Argentina. A esta información se ha agregado la obtenida en colecciones científicas, con un total de 1682 ejemplares examinados, así como los registros de la literatura. Como resultado, se ha definido que las Yungas de Argentina contienen actualmente una especie de noctiliónido, 12 phyllostómidos, 13 vespertiliónidos y 13 molóssidos. Para cada especie se detallan los ejemplares examinados, registros adicionales, comentarios sobre diferentes aspectos de su biología, distribución, reproducción, y otros aspectos de interés observados durante el trabajo de campo. Se presenta un análisis de la biogeografía de las especies de las Yungas de Argentina, a lo largo de un gradiente latitudinal, comparada con las Yungas de Bolivia y también con otras unidades fitogeográficas de Argentina, como el Chaco, Monte, Puna, Región Andina y Paranaense

First record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) in the Pleistocene of Santiago del Estero Province, Argentina

The first record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) from Pleistocene deposits of the Río Dulce, Rio Hondo Department, Santiago del Estero Province, Argentina, is reported. The morphology and morphometry observed in the specimen MPAT073 is coincident with the diagnostic characteristics of that species. This finding represents the northernmost and westernmost record of the species, and thus extends its geographical distribution. Geological data suggest that the material comes from a still unnamed Pleistocene stratigraphic unit. © 2017, Universidade de Sao Paulo. All rights reserved.Se presenta el primer registro del proterotérido Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) en sedimentos del Río Dulce, Departamento Río Hondo, provincia de Santiago del Estero, Argentina. Los rasgos morfológicos y morfométricos observados en el espécimen MPAT073 son coincidentes con los caracteres indicados como diagnósticos de esa especie. Este hallazgo representa el registro más septentrional y occidental reportado hasta el momento para esta especie, y extiende su rango de distribución geográfica conocida. Los datos geológicos disponibles sugieren que el material proviene de una unidad todavía innominada del Pleistoceno.Facultad de Ciencias Naturales y Muse

Two new species of Myotis (Chiroptera: Vespertilionidae) for Argentina

Seven new species of Myotis have been recently described from South America, elevating to 20 the total number of species of the genus recognized for the region. Myotis izecksohni and Myotis lavali were recently described from the States of Río de Janeiro, Paraná and Pernambuco, Brazil. These are clearly different from all other known species of the genus in their external and cranial characters, which are exactly comparable with our specimens collected in Argentina. This allows to greatly expand the known geographic distributions for these two species. The addition to Argentina of Myotis lavali with specimens collected in the Yungas ecoregion of Salta Province, and Myotis izecksohni with specimens collected in the Fields and Weedlands ecoregion of Misiones Province, increases the known ecoregions to date for the distribution of the two species.Facultad de Ciencias Naturales y Muse

Karyology and Morphometrics of Three Species of \u3ci\u3eAkodon\u3c/i\u3e (Mammalia: Muridae) from Northwestern Argentina

Chromosomal and morphometric studies were conducted on a sample from an assemblage of Akodon spp. occurring in various patterns of sympatry from the provinces of Catamarca, Jujuy, Salta, and Tucumán, Argentina. Results showed three distinct morphometric groups based upon size. Size also varied with age, but there were no significant differences in measurements of males and females. The three morphometric groups have distinct karyotypes. Akodon caenosus Thomas is the smallest of the three, and has a karyotype of 2n = 34, FN = 40. A. boliviensis tucumanensis J. A. Allen is intermediate in size and has 2n = 40, FN = 40,41. Three variations in centromeric position of the X chromosomes and two autosome arm numbers were found. A. varius simulator Thomas is the largest in size, has a distinctive white chin-spot, and has 2n = 41,42 and FN = 42. Variation in diploid number is apparently due to centric fission or fusion

Karyology and Morphometrics of Three Species of \u3ci\u3eAkodon\u3c/i\u3e (Mammalia: Muridae) from Northwestern Argentina

Chromosomal and morphometric studies were conducted on a sample from an assemblage of Akodon spp. occurring in various patterns of sympatry from the provinces of Catamarca, Jujuy, Salta, and Tucumán, Argentina. Results showed three distinct morphometric groups based upon size. Size also varied with age, but there were no significant differences in measurements of males and females. The three morphometric groups have distinct karyotypes. Akodon caenosus Thomas is the smallest of the three, and has a karyotype of 2n = 34, FN = 40. A. boliviensis tucumanensis J. A. Allen is intermediate in size and has 2n = 40, FN = 40,41. Three variations in centromeric position of the X chromosomes and two autosome arm numbers were found. A. varius simulator Thomas is the largest in size, has a distinctive white chin-spot, and has 2n = 41,42 and FN = 42. Variation in diploid number is apparently due to centric fission or fusion

First record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) in the Pleistocene of Santiago del Estero Province, Argentina

The first record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) from Pleistocene deposits of the Río Dulce, Rio Hondo Department, Santiago del Estero Province, Argentina, is reported. The morphology and morphometry observed in the specimen MPAT073 is coincident with the diagnostic characteristics of that species. This finding represents the northernmost and westernmost record of the species, and thus extends its geographical distribution. Geological data suggest that the material comes from a still unnamed Pleistocene stratigraphic unit. © 2017, Universidade de Sao Paulo. All rights reserved.Se presenta el primer registro del proterotérido Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) en sedimentos del Río Dulce, Departamento Río Hondo, provincia de Santiago del Estero, Argentina. Los rasgos morfológicos y morfométricos observados en el espécimen MPAT073 son coincidentes con los caracteres indicados como diagnósticos de esa especie. Este hallazgo representa el registro más septentrional y occidental reportado hasta el momento para esta especie, y extiende su rango de distribución geográfica conocida. Los datos geológicos disponibles sugieren que el material proviene de una unidad todavía innominada del Pleistoceno.Facultad de Ciencias Naturales y Muse

Two new species of Myotis (Chiroptera: Vespertilionidae) for Argentina

Seven new species of Myotis have been recently described from South America, elevating to 20 the total number of species of the genus recognized for the region. Myotis izecksohni and Myotis lavali were recently described from the States of Río de Janeiro, Paraná and Pernambuco, Brazil. These are clearly different from all other known species of the genus in their external and cranial characters, which are exactly comparable with our specimens collected in Argentina. This allows to greatly expand the known geographic distributions for these two species. The addition to Argentina of Myotis lavali with specimens collected in the Yungas ecoregion of Salta Province, and Myotis izecksohni with specimens collected in the Fields and Weedlands ecoregion of Misiones Province, increases the known ecoregions to date for the distribution of the two species.Facultad de Ciencias Naturales y Muse

Histiotus magellanicus (Chiroptera: Vespertilionidae)

Histiotus magellanicus (Philippi, 1866) is a vespertilionid bat called the southern big-eared brown bat. The dark color of the ears and the absence of a connecting band between the ears are the characters that clearly differentiate this species from all other species of Histiotus. It is a little-known species with a distribution restricted to the southern portions of Argentina and Chile.H. magellanicus is listed as Least Concern by the International Union for Conservation of Nature and Natural Resources.Fil: Díaz, María Mónica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Programa de Investigación de Biodiversidad Argentina; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Ossa, Gonzalo. Programa Para Conservación de Los Murciélagos de Chile; ChileFil: Barquez, Rubén M. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Programa de Investigación de Biodiversidad Argentina; Argentin