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Encarnación, Paraguay

Two species of Marmosa (Micoureus) have been documented from Paraguay. Based, in part, on a recently collected series of Marmosa constantiae, we review the morphometric relationships, distributions, and habitat associations of the two species in Paraguay. Marmosa paraguayana is documented from nine localities, all in eastern Paraguay, in the region originally covered by Upper Parana Atlantic Forest (UPAF). Marmosa constantiae is documented from five localities, all of which are forested areas (generally gallery forest) embedded within Cerrado patches bordering UPAF, or within the Humid Chaco or Dry Chaco ecoregions. Specimens of M. constantiae from the Dry Chaco locality Parque Nacional Defensores del Chaco are morphometrically distinct from both M. paraguayana and other M. constantiae specimens and may represent an unrecognized taxon. © 2015 by De Gruyter. Source

Smith P.,FAUNA Paraguay | Diaz S.D.R.,Museo Nacional de Historia Natural del Paraguay | Diaz S.D.R.,National University of Asuncion | Cibois A.,Natural History Museum of Geneva
Revue Suisse de Zoologie

The "Catalogos Sistematicos de los Vertebrados del Paraguay", published in two editions by Arnaldo de Win- kelried Bertoni (1878-1973) during the early decades of the 20th Century, represented one of the first attempts to collate in a single work the available information about Paraguayan birds. However various species listed in these works have been the subject of much debate by subsequent authors. In this paper we review the historical reports of 14 such species cited by Bertoni that were treated in later works as hypothetical, making historical reference to overlooked literature from the period and suggesting new status designations for each. Source

Smith P.,FAUNA Paraguay | Atkinson K.,Para La Tierra Reserva Natural Laguna Blanca | Brouard J.-P.,Para La Tierra Reserva Natural Laguna Blanca | Pheasey H.,Para La Tierra Reserva Natural Laguna Blanca
Russian Journal of Herpetology

Geographical sampling bias and restricted search methodologies have resulted in the distribution of Paraguayan reptiles and amphibians being patchily known. Available data is almost entirely based on brief collecting trips and rapid ecological inventories, often several decades apart, which inevitably struggle to detect more inconspicuous species and patterns of abundance. This has led to a deficit in our knowledge of the true distribution and abundance of Paraguayan reptiles and amphibians. The establishment of the NGO Para La Tierra at Reserva Natural Laguna Blanca (RNLB), Depto. San Pedro, Paraguay allowed the first modern sustained, multi-method inventory of Paraguayan reptiles and amphibians to be performed at a single site. Despite the small size of the reserve (804 ha), a total of 57 reptiles (12 of national conservation concern) and 32 amphibians (one of national conservation concern) were collected during five years of random sampling, qualifying RNLB as the most biodiverse reserve for reptiles and amphibians in the country. Six species occurring at RNLB have been found at no other Paraguayan locality. Legal protection for this private reserve expired in January 2015 and the conservation implications of the inventory results are discussed. It is proposed that the long term legal protection of the reserve be considered a national conservation priority and that the diversity of the herpetofauna be recognized with the designation of RNLB as Paraguay’s first Important Area for the Conservation of Amphibians and Reptiles. © 2016 Folium Publishing Company. Source

Smith P.,FAUNA Paraguay
Canadian Field-Naturalist

Cory's Bittern (Ixobrychus "neoxenus" exilis) is an enigmatic form, usually referred to as a rare dark colour phase or morph of Least Bittern (Ixobrychus exilis [Gmelin, 1789]). A review of the literature indicates that birds identified as Cory's Bittern show considerable plumage variation and commonly exhibit multiple plumage anomalies. Temporal and spatial clumping of records shows that they are of irregular occurrence; thus, they do not meet the criteria for recognition as a colour morph. Cory's Bittern should thus be viewed as a colloquial name that refers to any one of a number of abnormally dark-plumaged, genetically undefined and phenotypically heterogeneous Least Bitterns. Source

Smith P.,FAUNA Paraguay | Cacciali P.,Para La Tierra | Atkinson K.,Para La Tierra | Pheasey H.,Para La Tierra | Motte M.,Museo Nacional de Historia Natural del Paraguay
Check List

New distributional data are provided for 12 species of amphibian in Departamento San Pedro, Paraguay. Records are from the Reserva Natural Laguna Blanca, a small private reserve located in an area of transition from Atlantic Forest to Cerrado-type habitats. The chronic under-sampling of amphibian populations in Paraguay is highlighted. © 2012 Check List and Authors. Source

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