<?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>1026-8774</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias geológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. geol]]></abbrev-journal-title>
<issn>1026-8774</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1026-87742019000200195</article-id>
<article-id pub-id-type="doi">10.22201/cgeo.20072902e.2019.2.1044</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morfometría geométrica en elementos óseos postcraneales de los caballos del Pleistoceno tardío en México: implicaciones taxonómicas y ecomorfológicas]]></article-title>
<article-title xml:lang="en"><![CDATA[Geometric morphometrics in postcranial bone elements of Late Pleistocene horses in Mexico: taxonomic and ecomorphological implications]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-Leyva]]></surname>
<given-names><![CDATA[Alejandro H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alberdi]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Zepeda]]></surname>
<given-names><![CDATA[María Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ponce-Saavedra]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schaaf]]></surname>
<given-names><![CDATA[Peter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arroyo-Cabrales]]></surname>
<given-names><![CDATA[Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bastir]]></surname>
<given-names><![CDATA[Markus]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica Laboratorio Universitario de Geoquímica Isotópica]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Consejo Superior de Investigaciones Científicas Museo Nacional de Ciencias Naturales Departamento de Paleobiología]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Biología Laboratorio de Paleontología]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Biología Laboratorio de Entomología "Biol. Sócrates Cisneros Paz"]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional de Antropología e Historia Subdirección de laboratorio y Apoyo Académico Laboratorio de Arqueozoología "M. en C. Ticul Álvarez Solórzano"]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></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>36</volume>
<numero>2</numero>
<fpage>195</fpage>
<lpage>206</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1026-87742019000200195&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1026-87742019000200195&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1026-87742019000200195&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El género Equus es el último representante de la Familia Equidae cuya historia evolutiva tiene aproximadamente 55 millones de años. Este género es abundante en los depósitos mexicanos del Pleistoceno. En el presente trabajo se analizan elementos de las extremidades distales (metacarpos y metatarsos terceros, primeras y segundas falanges del tercer dígito) de Equus cedralensis, E. conversidens y E. mexicanus de tres localidades del Rancholabreano (0.21-0.16 a 0.095 Ma) en México mediante técnicas de morfometría geométrica. El objetivo es conocer si la forma de cada elemento estudiado difiere entre las especies de équidos, además de encontrar alguna relación ecomorfológica (forma vs. sustrato). Los resultados comprueban la existencia de tres grupos diferentes de forma que se relacionan con las tres especies de caballos registradas en las localidades estudiadas, además de existir elementos diagnósticos explicativos y poco explicativos para la diferenciación de las tres especies de caballo del Pleistoceno tardío en México. Con base en los tres diversos morfotipos se deduce que las especies pudieron vivir en microhábitats diferentes y por lo tanto coexistir en el mismo macrohábitat. Finalmente, la variedad de morfotipos en las localidades en estudio permite inferir que eran ambientes heterogéneos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The genus Equus is the last member of the Equidae family whose evolutionary history is about 55 million years. This horse is abundant in Mexican Pleistocene deposits. Elements of the distal extremities (third metacarpals and metatarsals, first and second phalanx of the third digit) of three horse species (Equus cedralensis, E. conversidens and E. mexicanus) from three localities of Mexican Rancholabrean (0.21-0.16 a 0.095 Ma) were analyzed using geometric morphometric techniques. The aim is know whether the shape of each element studied differs between species of horses and also find some ecomorphological connection (form vs. substrate). The results prove the existence of three different groups related with the three species of horse registered in the localities studied; also, the existence of diagnostic elements for the differentiation of the three species of the late Pleistocene horse in Mexico. Based on the three diverse morphotypes is deduced that the species could live in different microhabitats and therefore be able to coexist in the same macrohabitat. Finally, the diversity of morphotypes suggests heterogeneous environments in the study localities.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Rancholabreano]]></kwd>
<kwd lng="es"><![CDATA[extremidades distales]]></kwd>
<kwd lng="es"><![CDATA[équidos]]></kwd>
<kwd lng="es"><![CDATA[morfometría geométrica]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[Rancholabrean]]></kwd>
<kwd lng="en"><![CDATA[distal extremities]]></kwd>
<kwd lng="en"><![CDATA[equids]]></kwd>
<kwd lng="en"><![CDATA[geometric morphometric]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
</kwd-group>
</article-meta>
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