<?xml version='1.0' encoding='utf-8'?>
<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>Jeffrey E. Lovich</dc:contributor>
  <dc:contributor>Joshua R. Ennen</dc:contributor>
  <dc:contributor>Brian R. Kreiser</dc:contributor>
  <dc:contributor>Brian Folt</dc:contributor>
  <dc:contributor>Chris Lechowicz</dc:contributor>
  <dc:creator>James Godwin</dc:creator>
  <dc:date>2014</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Map turtles of the genus&amp;nbsp;&lt;/span&gt;&lt;i&gt;Graptemys&lt;/i&gt;&lt;span&gt;&amp;nbsp;are highly aquatic and rarely undergo terrestrial movements, and limited dispersal among drainages has been hypothesized to drive drainage-specific endemism and high species richness of this group in the southeastern United States. Until recently, two members of the megacephalic &amp;ldquo;&lt;/span&gt;&lt;i&gt;pulchra&lt;/i&gt;&lt;span&gt;&amp;nbsp;clade,&amp;rdquo;&amp;nbsp;&lt;/span&gt;&lt;i&gt;Graptemys barbouri&lt;/i&gt;&lt;span&gt;&amp;nbsp;and&lt;/span&gt;&lt;i&gt;Graptemys ernsti&lt;/i&gt;&lt;span&gt;, were presumed to be allopatric with a gap in both species' ranges in the Choctawhatchee River drainage. In this paper, we analyzed variation in morphology (head and shell patterns) and genetics (mitochondrial DNA and microsatellite loci) from&amp;nbsp;&lt;/span&gt;&lt;i&gt;G. barbouri&lt;/i&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;i&gt;G. ernsti&lt;/i&gt;&lt;span&gt;, and&amp;nbsp;&lt;/span&gt;&lt;i&gt;Graptemys&lt;/i&gt;&lt;span&gt;&amp;nbsp;sp. collected from the Choctawhatchee River drainage, and we document the syntopic occurrence of those species and back-crossed individuals of mixed ancestry in the Choctawhatchee River drainage. Our results provide a first counter-example to the pattern of drainage-specific endemism in megacephalic&amp;nbsp;&lt;/span&gt;&lt;i&gt;Graptemys&lt;/i&gt;&lt;span&gt;. Geologic events associated with Pliocene and Pleistocene sea level fluctuations and the existence of paleo-river systems appear to have allowed the invasion of the Choctawhatchee system by these species, and the subsequent introgression likely predates any potential human-mediated introduction.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1643/CH-13-132</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Society of Ichthyologists and Herpetologists</dc:publisher>
  <dc:title>Hybridization of two megacephalic map turtles (testudines: emydidae: &lt;i&gt;Graptemys&lt;/i&gt;) in the Choctawhatchee River drainage of Alabama and Florida</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>