<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532015000300674</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2015.06.006</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relaciones biogeográficas de los grandes ríos de la cuenca del Plata basadas en ensambles de serpientes]]></article-title>
<article-title xml:lang="en"><![CDATA[Biogeographical relationships of the large rivers of the Plata Basin based on snake assemblages]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arzamendia]]></surname>
<given-names><![CDATA[Vanesa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giraudo]]></surname>
<given-names><![CDATA[Alejandro R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bellini]]></surname>
<given-names><![CDATA[Gisela P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional del Litoral Instituto Nacional de Limnología ]]></institution>
<addr-line><![CDATA[ Santa Fe]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional del Litoral Facultad de Humanidades y Ciencias ]]></institution>
<addr-line><![CDATA[ Santa Fe]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>86</volume>
<numero>3</numero>
<fpage>674</fpage>
<lpage>684</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532015000300674&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532015000300674&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532015000300674&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los grandes ríos del Plata fluyen hacia el sur desde latitudes intertropicales a templadas y extienden la distribución de especies tropicales. Examinamos las siguientes hipótesis sobre relaciones biogeográficas de la ofidiofauna entre tramos de los ríos: el Alto Paraná tiene mayor afinidad con el Alto Uruguay, el Paraná Medio con el Paraguay Inferior respecto otros tramos del propio Paraná, y el Delta Superior tiene mayor afinidad con el Paraná Medio y el Delta Inferior con el Uruguay Inferior. Comparamos los tramos de los ríos y estos con las unidades fitogeográficas, usando 13,039 ejemplares de 104 taxones, mediante análisis de parsimonia de endemismos y similitud. Los resultados apoyan las 2 primeras hipótesis, no la tercera. El Delta Superior-Delta Inferior formaron un grupo con elevada similitud relacionado con el Uruguay Medio-Uruguay Inferior, y con el análisis de parsimonia de endemismos formaron un clado separado. Los tramos se relacionaron con las biorregiones que atraviesan, aunque el Uruguay Medio-Inferior solo con la provincia Paranaense (análisis de parsimonia de endemismos), debido a especies atlántico-paranaenses que alcanzan mayores latitudes por este río. El Paraná Medio-Paraguay Inferior-Paraná Superior se relacionan con el Chaco Húmedo y se discuten criterios de regionalización previos. Los ríos del Plata constituyen áreas de transición biogeográfica importantes para su conservación debido a la superposición de componentes bióticos tropicales y templados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The large rivers of the Plata flow southward from intertropical to temperate latitudes, extending the distribution of tropical species. We tested biogeographic hypotheses about relationships among sections of the rivers comparing their snake fauna: the High Paraná has greater affinity with the High Uruguay, the Middle Paraná with Lower Paraguay regarding other sections of Paraná itself, and the Upper Delta has greater affinity with the Middle Paraná and the Lower Delta with Lower Uruguay. We compared sections of rivers and these with phytogeographical units, by means of 13,039 records of 104 taxa, using parsimony analysis of endemicity and similarity. Our results support the first two hypotheses, not the third one. Upper Delta-Lower Delta formed a group with high similarity related to the Middle Uruguay-Lower Uruguay, and with PAE it formed a separate clade. Sections were associated with the bioregions that they crossed, although the Middle-Lower Uruguay did it only with the Parana province (parsimony analysis of endemicity) due to Atlantic-Parana species reaching higher latitudes by this river. The Middle Paraná-Lower Paraguay-Upper Paraná are related to Humid Chaco, being discussed previous published criteria of regionalization. Because of the overlap of tropical and temperate biotic components, larger Plata Rivers are biogeographic transition areas that are relevant to be preserved.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Parsimony analysis of endemicity]]></kwd>
<kwd lng="en"><![CDATA[Multivariate analysis]]></kwd>
<kwd lng="en"><![CDATA[Snakes]]></kwd>
<kwd lng="en"><![CDATA[South American rivers]]></kwd>
<kwd lng="en"><![CDATA[Biogeographic transition]]></kwd>
<kwd lng="en"><![CDATA[Argentina]]></kwd>
<kwd lng="es"><![CDATA[Análisis de parsimonia de endemismos]]></kwd>
<kwd lng="es"><![CDATA[Análisis multivariados]]></kwd>
<kwd lng="es"><![CDATA[Serpientes]]></kwd>
<kwd lng="es"><![CDATA[Ríos de América del Sur]]></kwd>
<kwd lng="es"><![CDATA[Transición biogeográfica]]></kwd>
<kwd lng="es"><![CDATA[Argentina]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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