<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442025000200002</article-id>
<article-id pub-id-type="doi">10.15517/rev.biol.trop..v73is1.63625</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Diversity of freshwater crab: new distributional data for four species (Decapoda: Pseudothelphusidae) from Meso- and South American countries]]></article-title>
<article-title xml:lang="es"><![CDATA[Diversidad de cangrejos de agua dulce: nuevos datos de distribución para cuatro especies (Decapoda: Pseudothelphusidae) de países de Meso y Sudamérica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magalhães]]></surname>
<given-names><![CDATA[Célio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wehrtmann]]></surname>
<given-names><![CDATA[Ingo-S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of São Paulo Faculty of Philosophy, Sciences and Letters at Ribeirão Preto (FFCLRP) Laboratory of Bioecology and Crustacean Systematics (LBSC), Department of Biology]]></institution>
<addr-line><![CDATA[ São Paulo]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Pesquisas da Amazônia (INPA)  ]]></institution>
<addr-line><![CDATA[ Manaus]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Museo de Zoología of the Centro de Investigación en Biodiversidad y Ecología Tropical (CIBET) ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2025</year>
</pub-date>
<volume>73</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442025000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442025000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442025000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  The Pseudothelphusidae is a very diverse family of primary freshwater crabs widely distributed throughout the Neotropical region, but the true extent of the geographic distribution of several species is poorly known because many of them occur in very remote areas with only a single or very few records available.  Objective:  Here we present new country records for four species of pseudothelphusid crabs from Meso- and South American countries.  Methods:  The data about the geographic distribution are based on specimens deposited in crustacean collections of institutions from Brazil, Germany, and USA; illustrations of the male first gonopod were prepared in stereomicroscope equipped with a camera lucida.  Results:  Occurrence records of Phygiopilus acanthophallus from Mexico, Fredius stenolobus from Guyana, and Kunziana irengis from Brazil are published for the first time, and the occurrence of Raddaus mertensi from Honduras is confirmed. Comments on the morphology of the male first gonopod of each species are given, their range extensions are discussed, and the importance of these new records for conservation assessments is highlighted.  Conclusions:  The new data expand the area of occurrence of these four species of Pseudothelphusidae freshwater crabs, providing new data that are relevant for taxonomic and biogeographical studies as well as for the development of better regional and national assessments of the conservation status of the aquatic fauna.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Pseudothelphusidae es una familia muy diversa de cangrejos primarios de agua dulce ampliamente distribuida por toda la región Neotropical, pero la verdadera extensión de la distribución geográfica de varias especies es poco conocida porque muchas de ellas viven en zonas muy remotas de las que sólo se dispone de un único registro o de muy pocos.  Objective:  Aquí presentamos nuevos registros nacionales para cuatro especies de cangrejos pseudotelfusidos de países de Meso- y Sudamérica.  Métodos:  Los datos sobre la distribución geográfica se basan en especímenes depositados en colecciones de crustáceos de instituciones de Brasil, Alemania y Estados Unidos; se prepararon ilustraciones del primer gonópodo masculino en un microscopio estereoscópico equipado con una cámara lúcida.  Resultados:  Se publican por primera vez los registros de ocurrencia de Phygiopilus acanthophallus en México, Fredius stenolobus en Guyana y Kunziana irengis en Brasil, y se confirma la presencia de Raddaus mertensi en Honduras. Se dan comentarios sobre la morfología del primer gonópodo masculino de cada especie, se discuten sus extensiones de distribución y se destaca la importancia de estos nuevos registros para las evaluaciones de conservación.  Conclusiones:  Los nuevos datos de la distribución geográfica amplían las áreas de ocurrencia de estas cuatro especies de cangrejos dulceacuícolas de la familia Pseudothelphusidae, proporcionando nuevos datos que son relevantes para estudios taxonómicos y biogeográficos, así como para el desarrollo de mejores evaluaciones regionales y nacionales del estado de conservación de la fauna acuática.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Amazonia]]></kwd>
<kwd lng="en"><![CDATA[biogeography]]></kwd>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[distribution records]]></kwd>
<kwd lng="en"><![CDATA[geographical range]]></kwd>
<kwd lng="en"><![CDATA[Guayana Shield]]></kwd>
<kwd lng="en"><![CDATA[Neotropical region]]></kwd>
<kwd lng="en"><![CDATA[Kingsleyinae]]></kwd>
<kwd lng="en"><![CDATA[Raddausinae.]]></kwd>
<kwd lng="es"><![CDATA[Amazonia]]></kwd>
<kwd lng="es"><![CDATA[biogeografía]]></kwd>
<kwd lng="es"><![CDATA[conservación]]></kwd>
<kwd lng="es"><![CDATA[registros de distribución]]></kwd>
<kwd lng="es"><![CDATA[rango geográfico]]></kwd>
<kwd lng="es"><![CDATA[escudo de Guayana]]></kwd>
<kwd lng="es"><![CDATA[región Neotropical]]></kwd>
<kwd lng="es"><![CDATA[Kingsleyinae]]></kwd>
<kwd lng="es"><![CDATA[Raddausinae.]]></kwd>
</kwd-group>
</article-meta>
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