<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512025000100121</article-id>
<article-id pub-id-type="doi">10.21829/abm132.2025.2429</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Pachyphytum angustiflorum (Crassulaceae), una especie nueva de Guanajuato, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Pachyphytum angustiflorum (Crassulaceae), a new species from Guanajuato, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Campos]]></surname>
<given-names><![CDATA[J. Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gasca Prieto]]></surname>
<given-names><![CDATA[Aureliano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montero Corrales]]></surname>
<given-names><![CDATA[J. Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Raya Sánchez]]></surname>
<given-names><![CDATA[Ricardo Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Tlajomulco de Zúñiga  ]]></institution>
<addr-line><![CDATA[Tlajomulco de Zúñiga Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Tecnológico Nacional de México Instituto Tecnológico de Roque ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<numero>132</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512025000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512025000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512025000100121&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos:  Pachyphytum es un género de la familia Crassulaceae, endémico de México, donde se distribuye principalmente en la región del Bajío. Consta de 25 especies, que en su mayoría presentan una distribución micro-endémica y muestran una preferencia por crecer sobre afloramientos rocosos. El presente trabajo tiene como objetivos describir e ilustrar a Pachyphytum angustiflorum, una especie nueva del estado de Guanajuato, evaluar su estado de conservación y presentar un mapa de distribución.  Métodos:  Se colectaron ejemplares vivos de la especie nueva, los cuales fueron analizados detalladamente en fresco para la elaboración de la descripción. Posteriormente, se herborizó un juego y serán depositados en los herbarios CIIDIR, IBUG y ZON, mientras que otros se mantienen en cultivo en la colección viva del IBUG. Se consultó la literatura especializada para determinar cuáles son las especies más cercanas morfológicamente. Además, se evaluó el estado de conservación de la especie nueva con base en los criterios de la Lista Roja de la IUCN. Se confeccionó el mapa con datos de especímenes de herbario del taxon nuevo y los taxones afines.  Resultados clave:  Se describe a Pachyphytum angustiflorum como una nueva especie para la ciencia a partir de un análisis comparativo con P. confusum, P. hookeri y P. viscidum, los taxones morfológicamente más cercanos. Se le asigna un estatus de En Peligro Crítico (CR) debido a su distribución restringida.  Conclusiones: Pachyphytum angustiflorum es endémica de la Barranca del Beato, municipio Tarimoro, Guanajuato, México. La descripción de esta especie contribuye al conocimiento de la alta riqueza y endemismo de este género.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Pachyphytum is a genus of the Crassulaceae family, endemic to Mexico, where it is primarily distributed in the Bajío region. It comprises 25 species that tend to grow on rocky walls and most of them exhibit micro-endemic distributions. This study aims to describe and illustrate a new species of Guanajuato state, assess its conservation status and present a distribution map.  Methods: Live specimens of the new species were collected and analyzed in fresh to prepare the description. Subsequently, they are to be deposited in the herbaria CIIDIR, IBUG and ZON, while others are being maintained in cultivation in the IBUG living collection. Specialized literature was consulted to determine its morphologically closest species. In addition, the conservation status was assessed based on the IUCN Red List criteria. The distribution map was created using herbarium specimen data from the new taxon and related taxa.  Key results:  Pachyphytum angustiflorum is described as a species new to science, based on a comparative analysis including P. confusum, P. hookeri and P. viscidum, morphologically the most similar taxa. It is assessed as Critically Endangered (CR) due to its restricted distribution.  Conclusions:  Pachyphytum angustiflorum is endemic to the Barranca del Beato, municipality Tarimoro, Guanajuato, Mexico. The description of this species contributes to the knowledge of the high species richness and endemism of this genus.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bosque tropical caducifolio]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[Pachyphytum hookeri]]></kwd>
<kwd lng="es"><![CDATA[sect. Pachyphytum]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[Pachyphytum hookeri]]></kwd>
<kwd lng="en"><![CDATA[sect. Pachyphytum]]></kwd>
<kwd lng="en"><![CDATA[tropical deciduous forest]]></kwd>
</kwd-group>
</article-meta>
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