<?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>S0187-71512025000100127</article-id>
<article-id pub-id-type="doi">10.21829/abm132.2025.2460</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Revisión del estatus de Polykrikos (Dinophyceae: Polykrikaceae) en la Bahía de Acapulco, Pacífico mexicano]]></article-title>
<article-title xml:lang="en"><![CDATA[Revision of the status of Polykrikos (Dinophyceae: Polykrikaceae) in Acapulco Bay, Mexican Pacific]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruíz-García]]></surname>
<given-names><![CDATA[Uriel T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zamudio-Resendiz]]></surname>
<given-names><![CDATA[María Eugenia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Okolodkov]]></surname>
<given-names><![CDATA[Yuri B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nunez-Resendiz]]></surname>
<given-names><![CDATA[María Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[Iztapalapa CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[Iztapalapa CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Veracruzana Instituto de Ciencias Marinas y Pesquerías ]]></institution>
<addr-line><![CDATA[Boca del Río Veracruz]]></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=S0187-71512025000100127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512025000100127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512025000100127&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Polykrikos es un género de dinoflagelados planctónicos de gran interés debido a sus sinapomorfías: la formación de pseudocolonias y presencia de complejos nematocisto-teniocisto. La presencia de P. kofoidii se registró por primera vez en el Pacífico mexicano en 2006 y en la Bahía de Acapulco en 2012, mientras que P. hartmannii fue registrado en el Pacífico mexicano en 2006, ambos identificados a partir de evidencia morfológica.  Métodos: Se recolectaron muestras de fitoplancton en cuatro sitios dentro y fuera de la Bahía de Acapulco entre julio 2022 y marzo 2025 (una vez por año), y se observaron células utilizando microscopía de luz.  Resultados clave:  Se obtuvieron imágenes de microscopía de luz de dos morfotipos de Polykrikos, los cuales fueron identificados con literatura especializada. La observación morfológica detallada permitió confirmar la presencia de P. hartmannii y P. kofoidii. Además, se corrige la identidad del individuo en la literatura publicada donde se le registra, añadiendo su referencia fotográfica.  Conclusiones: Tanto Polykrikos hartmannii como P. kofoidii se encuentran de manera recurrente en la Bahía de Acapulco y en la porción tropical del Pacífico mexicano.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Polykrikos is a genus of planktonic dinoflagellates of great interest due to its synapomorphies: a pseudocolony-forming habit and the presence of a nematocyst-taeniocyst complex. Polykrikos kofoidii was first recorded for the Mexican Pacific in 2006 and for Acapulco Bay in 2012, while P. hartmannii was recorded for the Mexican Pacific in 2006, based on morphological evidence.  Methods: Phytoplankton samples were collected in four sampling stations inside and outside Acapulco Bay between July 2022 and March 2025 (once per year), and the cells were observed using light microscopy.  Key results:  Light microscopy images of two distinct Polykrikos morphotypes were obtained and identified using specialized literature. Detailed morphological observation allowed us to confirm the presence of both P. hartmannii and P. kofoidii, with an amendment to the identity of previous records and the addition of photographic evidence.  Conclusions: In Acapulco Bay and the tropical portion of the Mexican Pacific, both P. hartmannii and P. kofoidii are found recurrently.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[dinoflagelados]]></kwd>
<kwd lng="es"><![CDATA[distribución]]></kwd>
<kwd lng="es"><![CDATA[identificación]]></kwd>
<kwd lng="es"><![CDATA[taxonomía]]></kwd>
<kwd lng="en"><![CDATA[dinoflagellates]]></kwd>
<kwd lng="en"><![CDATA[distribution]]></kwd>
<kwd lng="en"><![CDATA[identification]]></kwd>
<kwd lng="en"><![CDATA[taxonomy]]></kwd>
</kwd-group>
</article-meta>
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