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<front>
<journal-meta>
<journal-id journal-id-type="publisher">JM</journal-id>
<journal-title-group>
<journal-title>Journal of Micropalaeontology</journal-title>
<abbrev-journal-title abbrev-type="publisher">JM</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">J. Micropalaeontol.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2041-4978</issn>
<publisher><publisher-name>GSL Publishing</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.1144/jm.23.1.49</article-id>
<title-group>
<article-title>On the origin and evolution of a new anchialine stygobitic &lt;i&gt;Microceratina&lt;/i&gt; species (Crustacea, Ostracoda) from Christmas Island (Indian Ocean)</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Namiotko</surname>
<given-names>Tadeusz</given-names>
</name>
<xref ref-type="aff" rid="aff0">
<sup>0</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Wouters</surname>
<given-names>Karel</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Danielopol</surname>
<given-names>Dan L.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Humphreys</surname>
<given-names>William F.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group><aff id="aff0">
<label>0</label>
<addr-line>University of Gdan̄sk, Department of Genetics &amp; Cytology, Kladki 24, 80-822 Gdan̄sk, Poland (e-mail: )</addr-line>
</aff>
<aff id="aff1">
<label>1</label>
<addr-line>Royal Belgian Institute of Natural Sciences, Department of Invertebrates, Vautierstraat 29, B-1000 Brussels and Department of Biology, K.U. Leuven, Leuven, Belgium (e-mail: )</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Austrian Academy of Sciences, Limnological Institute, Mondseestraße 9, A-5310 Mondsee, Austria (e-mail: )</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>Western Australian Museum, Francis Street, Perth, Western Australia-6000, Australia (e-mail: )</addr-line>
</aff>
<pub-date pub-type="epub">
<day>01</day>
<month>05</month>
<year>2004</year>
</pub-date>
<volume>23</volume>
<issue>1</issue>
<fpage>49</fpage>
<lpage>59</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2004 Tadeusz Namiotko et al.</copyright-statement>
<copyright-year>2004</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://jm.copernicus.org/articles/23/49/2004/jm-23-49-2004.html">This article is available from https://jm.copernicus.org/articles/23/49/2004/jm-23-49-2004.html</self-uri>
<self-uri xlink:href="https://jm.copernicus.org/articles/23/49/2004/jm-23-49-2004.pdf">The full text article is available as a PDF file from https://jm.copernicus.org/articles/23/49/2004/jm-23-49-2004.pdf</self-uri>
<abstract>
<p>Marine species of the ostracod genus &lt;i&gt;Microceratina&lt;/i&gt; Swanson (Cytheruridae, Eucytherurinae) were until now known only from their hard parts, the valves and carapaces, as no living animals have been described. Here we report the first living population, from a tropical anchialine cave. The description of the limbs and hard parts of this new taxon, &lt;i&gt;M. martensi&lt;/i&gt; sp. nov., enhances our understanding of the origin and evolution of the cave-dwelling &lt;i&gt;Microceratina&lt;/i&gt; – the new species and &lt;i&gt;M. pseudoamfibola&lt;/i&gt; (Barbeito-Gonzalez) from an anchialine cave in Southern Italy – and clarifies their affinities with other Eucytherurinae species. &lt;i&gt;Microceratina&lt;/i&gt; is known from both Recent and fossil species (Quaternary, Tertiary and Late Cretaceous) from shelf and deep-sea habitats and/or sedimentary facies, located in the Pacific Ocean (along the Australian and New Zealand coasts), the Mediterranean (Greece and Italy), the North Atlantic (British Isles) and the Baltic Sea (Rügen Island). This suggests that the &lt;i&gt;Microceratina&lt;/i&gt; group spread through the expanding Tethys Ocean. The morphological traits of the two cave-dwelling species reflect their ecological conditions. Cave-dwelling &lt;i&gt;Microceratina&lt;/i&gt; species appear to have originated from epigean shallow water species predisposed to colonize subterranean habitats.</p>
</abstract>
<counts><page-count count="11"/></counts>
</article-meta>
</front>
<body/>
<back>
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