Primer registro de Tympanoctomys (Rodentia, Octodontidae) en ambientes xéricos del noroeste de la provincia de Córdoba, República Argentina

Abstract

RESUMENEl género Tympanoctomys incluye cuatro especies vivientes que habitan estepas arbustivas halófitas del centro-oeste y centro-sur de Argentina. A partir del estudio de restos óseos recuperados de egagrópilas de aves rapaces, documentamos la presencia de este roedor en un sector perisalino del Chaco Seco de Córdoba. Este constituye el primer registro de especímenes representativos de poblaciones actuales del taxón para la provincia, lo que justifica la necesidad de incrementar estudios sobre la diversidad de pequeños mamíferos en la región.

First record of the Delicate Salt Flat Mouse, Salinomys delicatus Braun & Mares, 1995 (Rodentia, Cricetidae) in a xeric environment of northwestern Córdoba (Argentina), with comments on its conservation status

“…Additional sampling, through traditional trapping methods, are also needed to obtain whole individuals, which would includi skeletons, tissues, and karyotypes. The records of S. delicatus (this work) and Tympanoctomys (Mignino et al 2021) also highlight the importance of continuing sampling of small mammals over time (see also Jayat et al 2016;Teta et al 2016). In this way, the continuity of research in the area will provide a better understanding of the population dynamics of both species and allow for the development of better conservation strategies for them.…”

“…This assertion was also supported by the recent finding of Tympanoctomys sp. (Mignino et al 2021), a caviomorph rodent specialist of xeric environments, occurring in this same area as S. delicatus.…”

Strix chacoensis (Aves: Strigiformes) as an accumulator of vertebrate material in an endangered world: Exploring new taphonomic and ecological perspectives

“…Some endemic mammal species of this region include the giant armadillo (Priodontes maximus), different peccary species like the collared peccary (Tayassu tajacu), and the quimilero (Catagonus wagneri) (Torres and Tamburini, 2018). Other species present in the region are the Geoffroy's cat (Leopardus geoffroyi), the Chacoan mara (Dolichotis salinicola), as well as some species with recent population declines, such as the guanaco (Lama guanicoe), and several micromammal species (Costa and Barri, 2018;Mignino et al, 2021Mignino et al, , 2023Torres and Tamburini, 2018).…”

“…Based on rainfall data collected by local farmers over the last six years, there is a substantial distinction between the wet season (November-April) and the dry season (May-October). Between the years 2013 and 2018, the average accumulated rainfall stood at 74.2 mm for the coldest and driest months, while the average accumulated rainfall during the wet season was 424.5 mm (Mignino et al, 2021).…”