You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A NEW AREA OF ENDEMISM FOR AMAZONIAN BIRDS IN THE RIO NEGRO BASIN
SÉRGIO H. BORGES and JOSÉ M. C. DA SILVA
The Wilson Journal of Ornithology
Vol. 124, No. 1 (March 2012), pp. 15-23
Published by: Wilson Ornithological Society
Stable URL: http://www.jstor.org/stable/41932795
Page Count: 9
You can always find the topics here!Topics: Birds, Biological taxonomies, Taxa, Ornithology, Geographic regions, Biogeography, Rivers, Zoology, Systematics, Handbooks
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
We describe a new area of endemism for Amazonian birds which we designate as the Jaú Area of Endemism. This area of endemism in central-western Amazonia north of the Rio Solimões was identified through congruent distributions of six avian taxa: Psophia crepitons ochroptera Pelzeln 1857, Nonnula amaurocephala Chapman 1921, Pteroglossus azara azara Vieilot 1819, Picumnus lafresnayi pusillus Pinto 1936, Synallaxis rutilans confinis Zimmer 1935, and Myrmoborus myotherinus ardesiacus Todd 1927. The southern and eastern limits of this area of endemism are the middle courses of the Solimões and Negro rivers, respectively. The northern limits apparently coincide with sandy soil vegetation along the middle Rio Negro. The western boundary remains undefined, but could involve the Japurá or Içá rivers north of the upper Solimões. Taxonomic studies and expansion of ornithological collections are needed to more precisely delimit the Jaú Area of Endemism. It is possible the avian taxa restricted to the Jaú Area of Endemism are derived through parapatric or peripatric speciation events from taxa whose ranges were centered in the Imeri and Napo areas of endemism. Alternatively, tectonic events that affect the lower course of the Rio Negro could influence bird distribution in this region if they serve as vicariance mechanisms.
The Wilson Journal of Ornithology © 2012 Wilson Ornithological Society