<?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>S0187-71512023000100108</article-id>
<article-id pub-id-type="doi">10.21829/abm130.2023.2177</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ricciocarpos natans (Marchantiophyta, Ricciaceae), new to Costa Rica, with a survey of its presence in Latin America]]></article-title>
<article-title xml:lang="es"><![CDATA[Ricciocarpos natans (Marchantiophyta, Ricciaceae), nueva para Costa Rica, con una revisión de su presencia en América Latina]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acuña Castillo]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[José Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco Coto]]></surname>
<given-names><![CDATA[Mario Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A4"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bezerra Silva]]></surname>
<given-names><![CDATA[Luiz Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Biología ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Biodiversidad y Ecología Tropical (CIBET) ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Florida Florida Museum of Natural History Department of Biology]]></institution>
<addr-line><![CDATA[Florida ]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[San José ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<numero>130</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512023000100108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512023000100108&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512023000100108&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Ricciocarpos natans is one of the few species of truly aquatic hepatics. It has a subcosmopolitan distribution and appears to be more common in temperate areas. The species has been considered to be very rare in Central America where it was known only from Panama. The objective of this study is to report the presence of this species in Costa Rica and to survey its current distribution in Latin America.  Methods:  We provide an overview of the distribution of the floating aquatic liverwort Ricciocarpos natans in Latin America based on literature, herbarium specimens and unequivocal photographic records across the region, as well as field work in Costa Rica.  Key results: Ricciocarpos natans is reported as new for Costa Rica. We provide the most complete survey to date of the geographic distribution of the species in Latin America.  Conclusions:  Our survey shows that Ricciocarpos natans appears to be more common and widely distributed in the Neotropics than previously assumed. Its assumed rarity seems to be the result of insufficient collection efforts.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Ricciocarpos natans es una de las pocas especies de hepáticas verdaderamente acuáticas. Tiene una distribución subcosmopolita y parece ser más común en áreas templadas. La especie ha sido considerada muy rara en América Central, donde solo se conocía de Panamá. El objetivo de este estudio es reportar la presencia de esta especie en Costa Rica y revisar su distribución en América Latina.  Métodos: Brindamos una descripción general de la distribución de la hepática acuática flotante Ricciocarpos natans en América Latina con base en la literatura, especímenes de herbario y registros fotográficos inequívocos en toda la región, así como trabajo de campo en Costa Rica.  Resultados clave: Ricciocarpos natans se reporta como nueva para Costa Rica. Brindamos el estudio más completo hasta la fecha de la distribución geográfica de la especie en América Latina.  Conclusiones:  Nuestro estudio muestra que Ricciocarpos natans parece ser más común y más ampliamente distribuida en el Neotrópico de lo que se suponía anteriormente. Su supuesta rareza parece ser el resultado de esfuerzos de recolección insuficientes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[aquatic plants]]></kwd>
<kwd lng="en"><![CDATA[geographic distribution]]></kwd>
<kwd lng="en"><![CDATA[Neotropics]]></kwd>
<kwd lng="en"><![CDATA[liverworts]]></kwd>
<kwd lng="en"><![CDATA[wetlands]]></kwd>
<kwd lng="es"><![CDATA[distribución geográfica]]></kwd>
<kwd lng="es"><![CDATA[hepáticas]]></kwd>
<kwd lng="es"><![CDATA[humedales]]></kwd>
<kwd lng="es"><![CDATA[Neotrópico]]></kwd>
<kwd lng="es"><![CDATA[plantas acuáticas]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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