RITA G. ROCHAEDUARDO FERREIRABARBARA M. A. COSTAIRACY C. M. MARTINS...
34页
查看更多>>摘要：The mid-Araguaia River basin in central Brazil is considered a priority area for biodiversity conservation, and Parque Es-tadual do Cantao (PEC) is one of the most important protected areas in this ecotone between Cerrado and Amazonia. This area suffers an intensive human pressure with high rates of deforestation, and still remains poorly studied in terms of biodiversity. From June 2007 to November 2008 we sampled small mammals from both banks of the mid-Araguaia River, in the states of Tocantins andPara. Data are given about morphological traits, geographic distribution and natural history of 22 species of small non-volant mammals (eight marsupials and 14 rodents) surveyed at PEC and its surroundings. We also present mitochondrial phylogenetic analyses that allow species identification within the genera: Oecomys, Oligory-zomys and Rhipidomys, and delineate an undescribed species of Thrichomys. Based on morphologic and molecular data, we describe a new species of Rhipidomys previously assigned toR. nitela, which is apparently endemic to the Araguaia-Tocantins basin in the Cerrado. Additionally, our phylogenetic analyses provide support for the role played by the Ara-guaia River as an important geographic barrier for two sister species of Rhipidomys.
RITA G. ROCHAEDUARDO FERREIRABARBARA M. A. COSTAIRACY C. M. MARTINS...
34页
查看更多>>摘要：The mid-Araguaia River basin in central Brazil is considered a priority area for biodiversity conservation, and Parque Es-tadual do Cantao (PEC) is one of the most important protected areas in this ecotone between Cerrado and Amazonia. This area suffers an intensive human pressure with high rates of deforestation, and still remains poorly studied in terms of biodiversity. From June 2007 to November 2008 we sampled small mammals from both banks of the mid-Araguaia River, in the states of Tocantins andPara. Data are given about morphological traits, geographic distribution and natural history of 22 species of small non-volant mammals (eight marsupials and 14 rodents) surveyed at PEC and its surroundings. We also present mitochondrial phylogenetic analyses that allow species identification within the genera: Oecomys, Oligory-zomys and Rhipidomys, and delineate an undescribed species of Thrichomys. Based on morphologic and molecular data, we describe a new species of Rhipidomys previously assigned toR. nitela, which is apparently endemic to the Araguaia-Tocantins basin in the Cerrado. Additionally, our phylogenetic analyses provide support for the role played by the Ara-guaia River as an important geographic barrier for two sister species of Rhipidomys.
查看更多>>摘要：We provide evidence for a new species of Liolaemus, which can be included in the L. dorbignyi group within the montanus series. Liolaemus vulcanus sp. nov. was previously confused with L. dorbignyi, but it exhibits states of character which allow us to differentiate the two taxa. The main differences with L. dorbignyi are in the color pattern and in the dorsal scales. Liolaemus vulcanus sp. nov. is saxicolous and it inhabits in rocky hills in the Puna regions of Northwestern Argentina. It is distributed in localities in Antofagasta de la Sierra department in Catamarca Province, Argentina .
查看更多>>摘要：We provide evidence for a new species of Liolaemus, which can be included in the L. dorbignyi group within the montanus series. Liolaemus vulcanus sp. nov. was previously confused with L. dorbignyi, but it exhibits states of character which allow us to differentiate the two taxa. The main differences with L. dorbignyi are in the color pattern and in the dorsal scales. Liolaemus vulcanus sp. nov. is saxicolous and it inhabits in rocky hills in the Puna regions of Northwestern Argentina. It is distributed in localities in Antofagasta de la Sierra department in Catamarca Province, Argentina .
查看更多>>摘要：The first adults of the calanticid, Calantica moskalevi Zevina and Galkin, 1989, and specimens of a new pachylasmatine balanomorph genus and species, have been recovered by MBARI's ROV Tiburon, from Juan de Fuca Ridge seamounts at -46° N - 130° W inthe NE Pacific off Oregon, -1450 m and 2080 m depths, respectively. These two apparently allopathic populations evidently represent remnants of stocks most commonly confined to relatively deep waters around islands and occasionally continental margins of the Indo-West Pacific. These Juan de Fuca representatives can be inferred to be relicts of once broad Paleogene Tethyan populations rather than relatively recent immigrants by way of the NW Pacific. Apparently, the refugium afforded by seamount "islands" at bathyal and abyssal depths accounts for their survival in this relatively remote corner of Pacific Oceania.
查看更多>>摘要：The first adults of the calanticid, Calantica moskalevi Zevina and Galkin, 1989, and specimens of a new pachylasmatine balanomorph genus and species, have been recovered by MBARI's ROV Tiburon, from Juan de Fuca Ridge seamounts at -46° N - 130° W inthe NE Pacific off Oregon, -1450 m and 2080 m depths, respectively. These two apparently allopathic populations evidently represent remnants of stocks most commonly confined to relatively deep waters around islands and occasionally continental margins of the Indo-West Pacific. These Juan de Fuca representatives can be inferred to be relicts of once broad Paleogene Tethyan populations rather than relatively recent immigrants by way of the NW Pacific. Apparently, the refugium afforded by seamount "islands" at bathyal and abyssal depths accounts for their survival in this relatively remote corner of Pacific Oceania.
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