1000 resultados para Kelley-Roosevelt-Field Museum expedition, 1928-192


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v. 31 (1960)

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v. 21 (1950)

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v. 17 (1946)

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v. 24 (1953)

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v. 26 (1955)

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v.33:no.4(1954)

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Cornerstone laid May 26, 1888; dedicated June 1891. Gift of Helen H. Newberry of Detroit as headquarters of Students' Christian Association. Leased by U-M as classroom in 1921; gift to U-M from SCA in 1937. Adapted as museum in 1928, named the Francis W. Kelsey Museum of Archaeology in 1953. Person in image.

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Cover title.

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Cornerstone laid May 26, 1888; dedicated June 1891. Gift of Helen H. Newberry of Detroit as headquarters of Students' Christian Association. Leased by U-M as classroom in 1921; gift to U-M from SCA in 1937. Adapted as museum in 1928, named the Francis W. Kelsey Museum of Archaeology in 1953.

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Cerradomy's is a monophyletic genus that includes four known species, Cerradomys subflavus, C maracajuensis, C. marinhus, and C. scotti, distributed throughout the open vegetation belt across South America, from northeastern Brazil to southeastern Bolivia, and from eastern to northwestern Paraguay. We revised the status of the species currently assigned to this genus by analyzing skins, skulls, karyotypes, and cytochrome b DNA sequences. We also described two novel species, one distributed in the Brazilian states of Minas Gerais, Bahia, and Sergipe, and the other in the states of Paraiba, Pernambuco, Piaui, Ceara, and Maranhao. Molecular analysis suggested the following phylogenetics arrangement: (((C. subflavus-C. sp.n.2) C. sp.n.1) C scotti)(C. marinhus-C. maracajuensis)). Apparently, both novel species inhabit the Caatinga domain and penetrated the coastal Atlantic rainforest, differing from the remaining congeneric species that are typical open-area inhabitants.

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We describe in this paper a new genus and species of cricetid rodent from the Atlantic Forest of Brazil, one of the most endangered eco-regions of the world. The new form displays some but not all synapomorphies of the tribe Oryzomyini, but a suite of unique characteristics is also observed. This new forest rat possesses anatomical characteristics of arboreal taxa, such as very developed plantar pads, but was collected almost exclusively in pitfall traps. Phylogenetic analyses of morphological (integument, soft tissue, cranial, and dental characters) and molecular [nuclear - Interphotoreceptor retinoid binding protein (Irbp) - and mitochondrial - cytochrome b - genes] datasets using maximum likelihood and cladistic parsimony approaches corroborate the inclusion of the new taxon within oryzomyines. The analyses also place the new form as sister species to Eremoryzomys polius, an Andean rat endemic to the Maranon valley. This biogeographical pattern is unusual amongst small terrestrial vertebrates, as a review of the literature points to few other similar examples of Andean-Atlantic Forest pairings, in hylid frogs, Pionus parrots, and other sigmodontine rodents. (C) 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 161, 357-390. doi:10.1111/j.1096-3642.2010.00643.x

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