A new species of river dolphin from Brazil or: how little do we know our biodiversity.
Tomas Hrbek,Vera M. F. da Silva,Nicole Dutra,Waleska Gravena,Anthony R. Martin,Izeni Pires Farias +5 more
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The discovery of a new species of a river dolphin from the Araguaia River basin of Brazil, the first such discovery in nearly 100 years, is reported, which is diagnosable by a series of molecular and morphological characters and diverged from its Amazonian sister taxon 2.08 million years ago.Abstract:
True river dolphins are some of the rarest and most endangered of all vertebrates. They comprise relict evolutionary lineages of high taxonomic distinctness and conservation value, but are afforded little protection. We report the discovery of a new species of a river dolphin from the Araguaia River basin of Brazil, the first such discovery in nearly 100 years. The species is diagnosable by a series of molecular and morphological characters and diverged from its Amazonian sister taxon 2.08 million years ago. The estimated time of divergence corresponds to the separation of the Araguaia-Tocantins basin from the Amazon basin. This discovery highlights the immensity of the deficit in our knowledge of Neotropical biodiversity, as well as vulnerability of biodiversity to anthropogenic actions in an increasingly threatened landscape. We anticipate that this study will provide an impetus for the taxonomic and conservation reanalysis of other taxa shared between the Araguaia and Amazon aquatic ecosystems, as well as stimulate historical biogeographical analyses of the two basins.read more
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Systematics And The Origin Of Species
TL;DR: The systematics and the origin of species is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can get it instantly.
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Hydropower and the future of Amazonian biodiversity
TL;DR: In an effort to ensure energy independence and exploit mineral resources, the governments of Amazonian countries are embarking on a major dam building drive on the basin's rivers, with 191 dams finished and a further 246 planned or under construction as discussed by the authors.
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Conceptual and empirical advances in Neotropical biodiversity research.
Alexandre Antonelli,María Ariza,María Ariza,James S. Albert,Tobias Andermann,Josué A. R. Azevedo,Christine D. Bacon,Søren Faurby,Thaís B. Guedes,Carina Hoorn,Lúcia G. Lohmann,Pável Matos-Maraví,Camila Duarte Ritter,Isabel Sanmartín,Daniele Silvestro,Marcelo F. Tejedor,Hans ter Steege,Hans ter Steege,Hanna Tuomisto,Fernanda P. Werneck,Alexander Zizka,Scott V. Edwards,Scott V. Edwards +22 more
TL;DR: This review highlights the great opportunities for studying the Neotropical biota to understand the evolution of life and urges more coordination and integration of data and ideas among disciplines, transcending their traditional boundaries, as a basis for advancing tomorrow’s ground-breaking research.
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A 17-My-old whale constrains onset of uplift and climate change in east Africa
Henry Wichura,Louis L. Jacobs,Andrew Lin,Michael J. Polcyn,Fredrick K. Manthi,Dale A. Winkler,Manfred R. Strecker,Matthew Clemens +7 more
TL;DR: This stranded whale fossil provides the first constraint on the initiation of east African uplift from near sea level at 17 Ma, limiting the timing and initial elevation of environmental change indicated by geodynamic and climatic modeling, paleosols, isotopes, paleobotany, and the mammalian fossil record.
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One thousand DNA barcodes of piranhas and pacus reveal geographic structure and unrecognised diversity in the Amazon
Valéria Nogueira Machado,Rupert A. Collins,Rafaela P. Ota,Marcelo C. Andrade,Izeni Pires Farias,Tomas Hrbek +5 more
TL;DR: The results recognise substantially underestimated diversity in the serrasalmids, and emphasise the Guiana and Brazilian Shield rivers as biogeographically important areas with multiple cases of across-shield and within-shield diversifications.
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