<?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>S1870-34532015000401024</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2015.09.004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Diatomeas epilíticas de la cuenca alta del río Laja, Guanajuato, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Epilithic diatoms in the Upper Laja River Basin, Guanajuato, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora]]></surname>
<given-names><![CDATA[Demetrio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carmona]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantoral-Uriza]]></surname>
<given-names><![CDATA[Enrique A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Freie Universität Berlin  ]]></institution>
<addr-line><![CDATA[Berlín ]]></addr-line>
<country>DE</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Ecología y Recursos Naturales]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></addr-line>
<country>MX</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>4</numero>
<fpage>1024</fpage>
<lpage>1040</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532015000401024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532015000401024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532015000401024&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se presenta el registro de las diatomeas epilíticas de los ríos Dolores y Laja, localizados en la cuenca alta del río Laja, Guanajuato, México. Las muestras se recolectaron en las temporadas seca-fría (enero) y lluviosa (octubre) del 2011. Se identificaron 173 taxa infragenéricos, de los cuales 7 son nuevos registros para México: Fallacia monoculata , Hantzschia abundans , Navigiolum uruguayense , Neidium bisulcatum , Nitzschia solita , Planothidium incuriatum y Sellaphora bacilloides; cabe mencionar que Navigiolum es nuevo registro a nivel genérico. Además, 3 especies son nuevos registros para el estado de Guanajuato: Gomphonema laticollum , G.subclavatum y Gomphosphenia lingulatiformis. Se encontraron formas teratológicas en 6 especies con abundancias relativas que variaron de 0.8 a 8.3%, siendo estas formas más abundantes en los sitios con mayores concentraciones de nutrientes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This study investigates the epilithic diatoms from the Dolores and Laja Rivers, located within the Upper Laja River Basin, Guanajuato, Mexico. The samples were collected during the cold-dry (January) and rainy (October) seasons of 2011. One-hundred seventy three infrageneric taxa were identified, 7 of which are new records for Mexico: Fallacia monoculata , Hantzschia abundans , Navigiolum uruguayense , Neidium bisulcatum , Nitzschia solita , Planothidium incuriatum and Sellaphora bacilloides; it is worth mentioning that Navigiolum is a new record at the genus level. Furthermore, 3 species are new records for the state of Guanajuato: Gomphonema laticollum , G.subclavatum and Gomphosphenia lingulatiformis. Teratological forms of 6 species were also found in the sampling sites with higher nutrient concentrations, with relative abundances varying from 0.8 to 8.3%.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Benthos]]></kwd>
<kwd lng="en"><![CDATA[Bacillaryophyta]]></kwd>
<kwd lng="en"><![CDATA[New records]]></kwd>
<kwd lng="en"><![CDATA[Temporary environments]]></kwd>
<kwd lng="en"><![CDATA[Streams]]></kwd>
<kwd lng="es"><![CDATA[Bentos]]></kwd>
<kwd lng="es"><![CDATA[Bacillariophyta]]></kwd>
<kwd lng="es"><![CDATA[Nuevos registros]]></kwd>
<kwd lng="es"><![CDATA[Ambientes temporales]]></kwd>
<kwd lng="es"><![CDATA[Ríos]]></kwd>
</kwd-group>
</article-meta>
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