<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222019000300761</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2019v71n3a8</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nueva especie de Laurinoxylon (Lauraceae) de la Formación El Bosque (Eoceno), Chiapas, México]]></article-title>
<article-title xml:lang="en"><![CDATA[New species of Laurinoxylon (Lauraceae) of the El Bosque Formation (Eocene), Chiapas, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Lara]]></surname>
<given-names><![CDATA[Diana Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Ruiz]]></surname>
<given-names><![CDATA[Emilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda-Posadas]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Zoología]]></institution>
<addr-line><![CDATA[ CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Zoología]]></institution>
<addr-line><![CDATA[ CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Facultad de Ciencias Biológicas Laboratorio de Paleontología]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>71</volume>
<numero>3</numero>
<fpage>761</fpage>
<lpage>772</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222019000300761&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222019000300761&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222019000300761&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se describe una nueva especie del género-fósil Laurinoxylon procedente de la Formación El Bosque (Eoceno), Chiapas, México. La nueva especie presenta las siguientes características distintivas: porosidad difusa, vasos solitarios y en múltiples radiales, placas de perforación simple, punteaduras intervasculares alternas, punteaduras vaso-radio con bordes reducidos de forma redonda, alargaas horizontal, vertical y diagonalmente, tílides con forma de burbuja, parénquima axial paratraqueal, vasicéntrico y apotraqueal difuso, radios heterocelulares y células oleí-feras asociadas a los radios y entre las fibras. Este género-fósil ha sido descrito desde el Cretácico hasta el Neógeno en varias partes del mundo. En México, se reporta formalmente por vez primera la presencia de Laurinoxylon, además de ser el primer reporte de macrofósil de Lauraceae para el Eoceno de nuestro país. Esta nueva especie soporta aún más la teoría que Lauraceae tuvo una amplia distribución durante el pasado y que México pudo ser un lugar importante de diversificación de la familia como lo demuestra su registro fósil que proviene desde el Cretácico Superior y por su número de géneros y especies que actualmente crecen.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We describe a new species of the fossil genus Laurinoxylon from the El Bosque Formation (Eocene), Chiapas, Mexico. The new species is characterized by: diffuse porous wood with indistinct growth rings; solitary vessels and in radial multiples of two to three vessels per radial multiple; simple perforation plates; alternate intervessel pits: septate and non-septate fibers; round vesselray parenchyma pits, horizontally and vertically elongated with reduced borders; axial parenchyma scanty paratracheal, vasicentric, apotracheal diffuse; heterogeneous rays, and oil cells associated to the ray parenchyma and among the fibers. This fossil genus has been described before from the Cretaceous to the Neogene, worldwide. This is the first formal record of Laurinoxylon and the first Eocene macrofossil report of Lauraceae from Mexico. This new species supports the hypothesis that the Lauraceae had a wide distribution during the past and that Mexico may be an important region for the diversification of the family as evidenced by its fossil record dating from the Late Cretaceous and by the high number of genera and species that currently grow in Mexico.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Eoceno]]></kwd>
<kwd lng="es"><![CDATA[Lauri-noxylon]]></kwd>
<kwd lng="es"><![CDATA[Formación El Bosque]]></kwd>
<kwd lng="es"><![CDATA[Chiapas]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[madera fósil]]></kwd>
<kwd lng="en"><![CDATA[Eocene]]></kwd>
<kwd lng="en"><![CDATA[Laurinoxy-lon]]></kwd>
<kwd lng="en"><![CDATA[El Bosque Formation]]></kwd>
<kwd lng="en"><![CDATA[Chiapas]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[fossil wood]]></kwd>
</kwd-group>
</article-meta>
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