<?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>S1870-34532020000100308</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2020.91.3167</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Are the Dioon edule (Zamiaceae) forms from San Luis Potosí proposed by Whitelock (2004) recognizable? Morphological evidence]]></article-title>
<article-title xml:lang="es"><![CDATA[¿Son reconocibles las formas de Dioon edule (Zamiaceae) de San Luis Potosí propuestas por Whitelock (2004)? Evidencia morfológica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio-Méndez]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yáñez-Espinosa]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leija]]></surname>
<given-names><![CDATA[Edgar G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí  ]]></institution>
<addr-line><![CDATA[San Luis Potosí San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Instituto de Investigación de Zonas Desérticas ]]></institution>
<addr-line><![CDATA[San Luis Potosí San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Investigaciones en Geografía Ambiental ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>91</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532020000100308&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532020000100308&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532020000100308&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Based on their morphological traits and elevation distribution, we analyzed 15 populations of Dioon edule and D. angustifolium located in the Sierra Madre Oriental in an elevation gradient from 294 to 1,314 m asl, to identify the forms proposed by Whitelock (2004). A non-parametric test was applied to find differences among elevation and populations. A discriminant analysis was applied to classify the population forms and calculate the proportion of well-classified observations, as well as Maxent to select the environmental predictors of the population's distribution. Ten populations were grouped into 3 forms proposed by Whitelock (2004): "angustifolium", "edule" and "rioverde", but 5 populations could not be classified as proposed forms, and they were named "tamasopo". The forms "tamasopo" and "rioverde" present intermediate values between the 2 species, with 63% of the individuals classified as "tamasopo" and 25% as "rioverde". Individuals with greater height, diameter, leave length and leave number correspond to the "edule" form in the lowest elevation. The most important variables to define the distribution of the populations are vegetation, slope and annual precipitation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En función de sus rasgos morfológicos y distribución de elevación, analizamos 15 poblaciones de Dioon edule y D. angustifolium ubicadas en la sierra Madre Oriental en un gradiente de elevación de 294 a 1,314 m snm, para identificar las formas propuestas por Whitelock (2004). Se aplicó una prueba no paramétrica para encontrar diferencias entre la elevación y las poblaciones. Se aplicó un análisis discriminante para clasificar las formas de las poblaciones y calcular la proporción de observaciones bien clasificadas, así como a Maxent para seleccionar los predictores ambientales de la distribución de las poblaciones. Diez poblaciones se agruparon en 3 formas propuestas por Whitelock (2004): "angustifolium", "edule" y "rioverde", pero 5 poblaciones no pudieron clasificarse como formas propuestas y se llamaron "tamasopo". Las formas "tamasopo" y "rioverde" presentan valores intermedios entre las 2 especies, con 63% de los individuos clasificados como "tamasopo" y 25% como "rioverde". Los individuos con mayor altura, diámetro, longitud de hojas y número de hojas corresponden a la forma "edule" en la elevación más baja. Las variables más importantes para definir la distribución de las poblaciones son la vegetación, la pendiente y la precipitación anual.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Classification]]></kwd>
<kwd lng="en"><![CDATA[Dioon edule]]></kwd>
<kwd lng="en"><![CDATA[Elevation]]></kwd>
<kwd lng="en"><![CDATA[Environmental variables]]></kwd>
<kwd lng="en"><![CDATA[Morphological traits]]></kwd>
<kwd lng="es"><![CDATA[Classificación]]></kwd>
<kwd lng="es"><![CDATA[Dioon edule]]></kwd>
<kwd lng="es"><![CDATA[Elevación]]></kwd>
<kwd lng="es"><![CDATA[Variables ambientales]]></kwd>
<kwd lng="es"><![CDATA[Rasgos morfológicos]]></kwd>
</kwd-group>
</article-meta>
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