Tatiana Sanchez

Programa de Investigaciones de Biodiversidad Argentina (PIDBA) · Mastozoología

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...

New records are provided for two species of bat from Argentina belonging to the family Vespertilionidae, Histiotus montanus and the recently described Neoeptesicus ulapesensis . These data extend the range of both species incorporating them into two new provinces. One record comes from the revision of a specimen deposited in the Colección Mamíferos...

As currently understood, the genus Nyctinomops contains four species: N. aurispinosus (Peale, 1849), N. femorosaccus (Merriam, 1889), N. laticaudatus (É. Geoffroy St.-Hilaire, 1805), and N. macrotis (Gray, 1840). Only N. macrotis and N. laticaudatus have been recorded from Argentina. We found that specimens of Nyctinomops captured in the province o...

Ctenomys is one of the most speciose genera among South American rodents, whose systematics have not yet been fully elucidated. One of the difficulties for clarifying the identity of its species is the limited information available on some of them, erected more than a century ago and of which only the original descriptions are known, generally very...

Cline variation in ecoregion transition zones can provide strong evidence for adaptation to different environments. We describe the geographical gradations of phenotypes and genetic variation between two rodent species across an environmental gradient in northwestern Argentina. We applied an integrative analysis of the genetic (mtDNA) and phenotypi...

Este trabajo de investigación tuvo por objetivo principal estudiar y conocer la diversidad de especies de micromamíferos de La Rioja, definir sus identidades taxonómicas, afinar el conocimiento sobre la distribución de cada una de ellas y analizar patrones biogeográficos que derivan de los análisis de sus distribuciones. La metodología básica consi...

Ctenomys famosus is one of the less known species of the genus, both in systematic and in phylogenetic aspects, as well as in its distribution and natural history. So far the only known specimens of this species are those from the type series, collected at the two localities mentioned in the original description, in La Rioja province, Argentina. We...

Eight species of the bat genus Eptesicus are distributed in South America of which four are known from Argentina. Here, we describe a new species, based on specimens collected from La Rioja Province, and one specimen from Mendoza Province, Argentina, deposited in a museum collection. This new species of Eptesicus can be distinguished from other con...

Here, we present the first record of Eptesicus brasiliensis argentinus Thomas, 1920 for the province of Entre Ríos, Argentina. This subspecies was originally described as a full species ( E. argentinus ) based on its morphological features that clearly separate it from all other species of the genus. However, it was later treated as a subspecies of...

The mammalian and flea fauna of La Rioja Province is one of the least known from northwestern Argentina. In this study, the distribution and nomenclature of 13 species of fleas of bats and rodents from La Rioja Province are updated. Four species of fleas are recorded for the first time in La Rioja Province including a new record for northwestern Ar...

El objetivo de este trabajo ha sido estudiar la presencia y distribución de las especies de armadillos de la provincia de La Rioja, definiendo en lo posible sus registros puntuales y añadiendo datos históricos encontrados para algunas especies. La metodología consistió en el estudio de ejemplares depositados en las colecciones sistemáticas más impo...

Ctenomys famosus es una de las especies menos conocida del género tanto en aspectos sistemáticos y filogenéticos, como en su distribución e historia natural. Se trata de una especie rara, sólo registrada en dos localidades de la provincia de La Rioja. A partir de una visita a la localidad tipo y la colecta de dos ejemplares hemos podido aportar inf...

We provide new distributional records for five species of bats from Argentina, of the families Vespertilionidae and Molossidae, representing new records for Catamarca, Chaco, La Rioja, Misiones, and San Juan provinces, as well as unpublished data for several phytogeographic regions of the country. This information adds important extensions to the d...

We provide new distributional records for fie species of bats from Argentina, of tbe fadies Vespertilionidae and Molossidae, representing new records for Catamarm, ChamI La Rioja, Misiones, and San Juan provinces, as well as unpublished data for sweral phytogeographic regions of the cornby. 'Ihis information adds important extensions to the dimhuti...

The early distribution of Euphractus sexcinc- tus in central-southwestern Argentina is here confirmed through an historical record from La Rioja province that was found at the Buenos Aires “Museo Argentino de Ciencias Naturales Bernardino Rivadavia”, and neglect- ed since 1935. The specimen corresponds to a complete head, with skull included, prese...

The early distribution of Euphractus sexcinctus in central-southwestern Argentina is here confirmed through an historical record from La Rioja province that was found at the Buenos Aires “Museo Argentino de Ciencias Naturales Bernardino Rivadavia”, and neglect- ed since 1935. The specimen corresponds to a complete head, with skull included, preserv...