<?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>S1870-34532022000100325</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2022.93.4116</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Bioestratigrafía del Devónico Superior y el Carbonífero Inferior: evento de extinción Kellwasser Inferior en Sonora central, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Upper Devonian and Lower Carboniferous biostratigraphy: Lower Kellwasser extinction event in Central Sonora, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palafox-Reyes]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vachard]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clausen]]></surname>
<given-names><![CDATA[Sébastien]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buitrón-Sánchez]]></surname>
<given-names><![CDATA[Blanca Estela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Devaere]]></surname>
<given-names><![CDATA[Léa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Amaya]]></surname>
<given-names><![CDATA[Iveth Viridiana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora Departamento de Geología ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centre National de la Recherche Scientifique  ]]></institution>
<addr-line><![CDATA[Lille ]]></addr-line>
<country>France</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología Departamento de Paleontología]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Estatal de Sonora Ingeniería en Geociencias ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>93</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532022000100325&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532022000100325&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532022000100325&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En el estado de Sonora afloran importantes secuencias del Paleozoico Superior con una abundante biota fósil relativamente bien preservada. El objetivo de este trabajo es estudiar los afloramientos localizados en el cerro El Yugo, ubicado en el municipio de Arivechi, noroeste de México, mediante bioestratigrafía de alta resolución basada en foraminíferos. La metodología consiste en la elaboración de secciones delegadas para microfacies así como estudio de óxidos mayores por medio de fluorescencia de rayos X (FRX), además de la extracción de conodontos mediante la disolución de caliza con ácido acético. El estudio documenta la biota presente en las rocas portadoras, lo cual permite realizar una correlación de microfacies, óxidos mayores y biota. Los resultados permiten identificar las biozonas de Nanicella gallowayi, Eogeinitzina devonica, Moravamminidae indet., Tikhinella measpis, Laxoendothyra parakosvensis y Stacheoides tenuis, lo cual permite datar la secuencia en un rango comprendido del Devónico Superior (Frasniano) al Misisípico Inferior-Medio (Tournaisiano-Viseano). El evento de extinción Kellwasser (LKW) del Devónico Superior es identificado en el presente estudio mediante la desaparición de T. measpis y E. devonica en el límite Frasniano-Famenniano. Posterior al Famenniano, la ausencia de biota fósil indica un período de recuperación de ésta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Important Upper Paleozoic sequences crop out in the state of Sonora with an abundant, relatively well-preserved, fossil biota. This work aims to study the outcrops found in Cerro El Yugo, which is located in the Municipality of Arivechi, in northwestern Mexico, through high-resolution biostratigraphy based on foraminifera. Samples were prepared for thin sections and studied for microfacies analysis. Major oxides were also studied by means of X-ray fluorescence, in addition to the extraction of conodont elements by dissolving limestone with acetic acid. The study documents the biota present in the host rocks, which allows for a correlation of microfacies, major oxides and biota. Biozones of Nanicella gallowayi, Eogeinitzina devonica, Moravamminidae indet., Tikhinella measpis, Laxoendothyra parakosvensis, and Stacheoides tenuis were identified, which allowed the dating of the sequence to between the Upper Devonian (Frasnian) and the Lower-Middle Mississippian (Tournaisian-Visean). The Late Devonian (Kellwasser) event is identified in the present study by the disappearance of T. measpis and E. devonica at the Frasnian-Famennian boundary. After the Famennian, the absence of fossil biota indicates a period of recovery of it.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Frasniano]]></kwd>
<kwd lng="es"><![CDATA[Famenniano]]></kwd>
<kwd lng="es"><![CDATA[Foraminíferos]]></kwd>
<kwd lng="en"><![CDATA[Frasnian]]></kwd>
<kwd lng="en"><![CDATA[Famennian]]></kwd>
<kwd lng="en"><![CDATA[Foraminifera]]></kwd>
</kwd-group>
</article-meta>
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