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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>R. Terry Chesser</dc:contributor>
  <dc:contributor>Katherine F. Stryjewski</dc:contributor>
  <dc:contributor>Bret M Whitney</dc:contributor>
  <dc:creator>Morton L Isler</dc:creator>
  <dc:date>2025</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Working within the framework of a companion phylogenetic analysis, we reexamined species limits within three lineages of antwrens (two species and one species complex) widely distributed across the Amazon Basin. Diagnostic differences in vocal and plumage characters provided the basis for the following taxonomic revisions.&amp;nbsp;&lt;/span&gt;&lt;i&gt;Myrmotherula longipennis&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;is found to comprise three species: (1)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. longipennis&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;(&lt;/span&gt;&lt;i&gt;sensu stricto&lt;/i&gt;&lt;span&gt;), which is confined to the region north of the Amazon; (2)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. garbei&lt;/i&gt;&lt;span&gt;, which is elevated from subspecies status and includes the subspecies&amp;nbsp;&lt;/span&gt;&lt;i&gt;zimmeri&lt;/i&gt;&lt;span&gt;; and (3)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. paraensis&lt;/i&gt;&lt;span&gt;, which is also elevated from subspecies status and includes subspecies&amp;nbsp;&lt;/span&gt;&lt;i&gt;transitiva&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;and&amp;nbsp;&lt;/span&gt;&lt;i&gt;ochrogyna&lt;/i&gt;&lt;span&gt;.&amp;nbsp;&lt;/span&gt;&lt;i&gt;Myrmotherula menetriesii&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;also comprises three species: (1)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. menetriesii&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;(&lt;/span&gt;&lt;i&gt;sensu stricto&lt;/i&gt;&lt;span&gt;), which occurs in the southwest quadrant of Amazonia and includes the subspecies&amp;nbsp;&lt;/span&gt;&lt;i&gt;berlepschi&lt;/i&gt;&lt;span&gt;; (2)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. cinereiventris&lt;/i&gt;&lt;span&gt;, which is elevated from subspecies status and includes the subspecies&amp;nbsp;&lt;/span&gt;&lt;i&gt;pallida&lt;/i&gt;&lt;span&gt;; and (3)&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. omissa&lt;/i&gt;&lt;span&gt;, which is monotypic and is also elevated from subspecies status. We maintain two species in the&amp;nbsp;&lt;/span&gt;&lt;i&gt;Isleria&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;complex,&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. guttata&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;and&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. hauxwelli&lt;/i&gt;&lt;span&gt;.&amp;nbsp;&lt;/span&gt;&lt;i&gt;Isleria guttata&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;remains monotypic, but the subspecies of&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. hauxwelli&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;are revised.&amp;nbsp;&lt;/span&gt;&lt;i&gt;Isleria h. hellmayri&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;is preserved as currently defined, but&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. h. suffusa&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/i&gt;&lt;span&gt;is synonymized with the nominate form, the geographic range of which is restricted to western Amazonia. A fourth subspecies,&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. h. clarior&lt;/i&gt;&lt;span&gt;, is resurrected; this subspecies occupies the major part of the range previously assigned to&amp;nbsp;&lt;/span&gt;&lt;i&gt;I. h. hauxwelli&lt;/i&gt;&lt;span&gt;.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.11646/zootaxa.5722.1.2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Magnolia</dc:publisher>
  <dc:title>Systematics of three Amazonian antwren groups (Aves: Passeriformes: Thamnophilidae: Myrmotherula and Isleria)</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>