Dense-sampling reveals a complex distributional pattern between the southernmost marsupials Lestodelphys and Thylamys in Patagonia, Argentina
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Anahí E. Formoso
,
Daniel E. Udrizar Sauthier
Abstract
Lestodelphys halli and Thylamys pallidior are southernmost representatives of the Order Didelphimorphia. We analyzed their southern distribution compiling locality records south of 42°S (Chubut and Santa Cruz provinces). We found 87 locality records for L. halli and 105 for T. pallidior. The distribution of L. halli reaches the central plateaus of Santa Cruz province but avoids the northeastern corner of the Deseado Massif. We report the southernmost locality for this species. The eastern and southern distribution of T. pallidior follows the courses of major rivers and coastal areas and it was not found at altitudes >700 m. Its southern distribution is more reduced than in L. halli, not reaching latitudes south of 46°S. We have recorded 20 localities of sympatry between both taxa, all of them from owl pellet samples; however, we have not found conclusive evidence of syntopy by trapping at any site. Both marsupials have widespread distribution in south-central Patagonia with two different histories: one, that of L. halli, related to Patagonian steppes and the other one linked to arid and semiarid lowlands represented by T. pallidior.
©2011 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Original Studies
- A test of Allen’s rule in subterranean mammals: the genus Ctenomys (Caviomorpha, Ctenomyidae)
- Effect of seed availability on hoarding behaviors of Siberian chipmunk (Tamias sibiricus) in semi-natural enclosures
- Frugivory patterns and seed dispersal by golden-headed lion tamarins (Leontopithecus chrysomelas) in Una Biological Reserve, Bahia, Brazil
- Abundance of Callicebus barbarabrownae (Hershkovitz 1990),(Primates: Pitheciidae) and other nonvolant mammals in a fragment of arboreal Caatinga in northeastern Brazil
- Medium to large-sized mammals in agricultural landscapes of south-eastern Brazil
- Distribution, population size and morphometrics of the giant-striped mongoose Galidictis grandidieri Wozencraft 1986 in the sub-arid zone of south-western Madagascar
- Selectivity of mammalian predator control in managed hunting areas: an example in a Mediterranean environment
- Short Notes
- Dense-sampling reveals a complex distributional pattern between the southernmost marsupials Lestodelphys and Thylamys in Patagonia, Argentina
- Occurrence of Marmosa waterhousei in the Venezuelan Andes, with comments on its biogeographic significance
- High elevation records of ocelots (Leopardus pardalis) in Jalisco, Mexico
- The influence of habitat structure on the European brown hare Lepus europaeus food habits in mountainous areas of northern Greece
- Sites with reduced predation risk to young hares within an agricultural landscape
- Book Reviews
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