<?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>S0187-71512025000100137</article-id>
<article-id pub-id-type="doi">10.21829/abm132.2025.2493</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A new species of Pachyphytum (Crassulaceae) from the Sierra de Puruagua, Guanajuato, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Una especie nueva de Pachyphytum (Crassulaceae) de la Sierra de Puruagua, Guanajuato, México]]></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[Carreño Plascencia]]></surname>
<given-names><![CDATA[E. Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quirarte-Tejeda]]></surname>
<given-names><![CDATA[Jaime. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos Caltzonzi]]></surname>
<given-names><![CDATA[Jorge A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Biológicas y Agropecuarias ]]></institution>
<addr-line><![CDATA[ Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Roque  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Grupo de Estudio de Cactáceas y Vida Silvestre del Occidente A.C.  ]]></institution>
<addr-line><![CDATA[ Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Ciencias Naturales Querétaro ]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></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=S0187-71512025000100137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512025000100137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512025000100137&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background and Aims: Pachyphytum (Crassulaceae) is a genus with 26 species endemic to Mexico. During explorations in the Sierra de Puruagua, Guanajuato, a population of Pachyphytum with distinctive characteristics was discovered. The aims of this study were to describe P. theodactylum as a new species to science, present a distribution map, assess its conservation status and provide a key to the Pachyphytum taxa in Guanajuato.  Methods: Flowering specimens were collected for morphological analysis and data were compared with the most similar species. The collections were prepared as herbarium specimens and will be deposited in the IBUG and ZON herbaria. Its conservation status was assessed using GeoCAT and IUCN criteria. The distribution map was generated in QGIS with georeferenced herbarium coordinates projected on a layer of the biogeographic provinces of Mexico. The identification key was elaborated based on specialized literature.  Key results: Pachyphytum theodactylum is described as a new species morphologically similar to P. garciae, distinguished primarily by its longer and wider stems, elliptic-lanceolate peduncle bracts with acute apex, longer pedicels, sepals with pink and olive coloration and acute apex, shorter antesepalous stamens, and pink styles. It is assessed as a Critically Endangered (CR) species.  Conclusions: The description of Pachyphytum theodactylum raises the number of endemic species of the genus in Mexico to 27. Given its vulnerability, conservation measures are recommended.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes y Objetivos: Pachyphytum (Crassulaceae) es un género con 26 especies endémicas de México. Durante exploraciones en la Sierra de Puruagua, Guanajuato, se descubrió una población de Pachyphytum con características distintivas. Los objetivos de este estudio fueron describir P. theodactylum como una especie nueva para la ciencia, presentar un mapa de distribución, evaluar su estado de conservación y proporcionar una clave para los taxones de Pachyphytum en Guanajuato.  Métodos: Se colectaron ejemplares en floración para su análisis morfológico y los datos se compararon entre las especies más similares. Los especímenes colectados se herborizaron y serán depositados en los herbarios IBUG y ZON. Su estado de conservación fue evaluado con GeoCAT y los criterios de la IUCN. El mapa de distribución se generó en QGIS con coordenadas georreferenciadas de ejemplares de herbario, proyectadas sobre una capa de las provincias biogeográficas de México. La clave de identificación se elaboró con base en literatura especializada.  Resultados clave:  Se describe a P. theodactylum como una especie nueva morfológicamente similar a P. garciae, que se distingue principalmente por sus tallos más largos y anchos, brácteas del pedúnculo elíptico-lanceoladas con ápice agudo, pedicelos más largos, sépalos de coloración rosa y oliva con ápice agudo, estambres antesépalos más cortos y estilos rosados. Se propone su clasificación como una especie En Peligro Crítico (CR).  Conclusiones: La descripción de Pachyphytum theodactylum eleva a 27 el número de especies del género endémicas de México. Dada su vulnerabilidad, se recomienda implementar medidas de conservación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[endemic species]]></kwd>
<kwd lng="en"><![CDATA[Pachyphytum garciae]]></kwd>
<kwd lng="en"><![CDATA[rupicolous flora]]></kwd>
<kwd lng="en"><![CDATA[sect. Pachyphytum]]></kwd>
<kwd lng="es"><![CDATA[especie endémica]]></kwd>
<kwd lng="es"><![CDATA[flora rupícola]]></kwd>
<kwd lng="es"><![CDATA[Pachyphytum garciae]]></kwd>
<kwd lng="es"><![CDATA[sect. Pachyphytum]]></kwd>
</kwd-group>
</article-meta>
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<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[New York Botanical Garden&#8217;s Virtual Herbarium]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
