<?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>S0034-77442021000500387</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v69isuppl.1.46370</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morfología y crecimiento relativo en Clypeaster europacificus (Clypeasteroida: Clypeasteridae) del Golfo de California]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphology and relative growth in Clypeaster europacificus (Clypeasteroida: Clypeasteridae) from the Gulf of California]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conejeros-Vargas]]></surname>
<given-names><![CDATA[Carlos-Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanvicente-Añorve]]></surname>
<given-names><![CDATA[Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solís-Marín]]></surname>
<given-names><![CDATA[Francisco-Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caballero-Ochoa]]></surname>
<given-names><![CDATA[Andrea-Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Laguarda-Figueras]]></surname>
<given-names><![CDATA[Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>69</volume>
<fpage>387</fpage>
<lpage>403</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442021000500387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442021000500387&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442021000500387&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: Clypeaster europacificus es una especie de galleta de mar que se distribuye de 0 a 200 m en el Golfo de California.  Objetivo:  Describir la morfología y el crecimiento relativo en la testa de C. europacificus.  Métodos:  Medimos 1 846 especímenes de museo de C. europacificus (N = 1 846) y analizamos el patrón de crecimiento en 32 especímenes de Baja California Sur, México (64 m de profundidad). Estudiamos cinco variables: radio mayor (R) (variable independiente), radio menor (r), longitud del pétalo anterior (LP), área total de prueba (A) y peso seco (P).  Resultados:  El área de cobertura del petaloide y el contorno de la testa son los caracteres taxonómicos importantes para C. europacificus: los especímenes van desde casi redondos en especímenes pequeños (&#8804; 3 cm de radio) a ondulados, enfatizando un contorno pentagonal, en organismos más grandes (&#8805; 3,1 cm de radio).  Conclusiones:  Existe un crecimiento alométrico negativo en las relaciones R vs. r, R vs. A y R vs. P; mientras que la relación R vs. LP tiene un crecimiento alométrico positivo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Clypeaster europacificus is a species of sand dollar found from 0 to 200 m in the Gulf of California.  Objective:  Describe the morphology and relative growth in the test of C. europacificus.  Methods:  We measured 1 846 museum specimens of C. europacificus (N = 1 846) and analyzed growth pattern in 32 specimens from Baja California Sur, Mexico (64 m depth). We studied five variables: major radius (R) (independent variable), minor radius (r), length of anterior petal (LP), total test area (A) and dry weight (P).  Results:  The petaloid cover area and the outline of the test are the important taxonomic characters for C. europacificus: they range from almost round in small specimens (&#8804; 3 cm in radius) to wavy, emphasizing a pentagonal outline, in larger organisms (&#8805; 3.1 cm in radius).  Conclusions:  There is negative allometric growth in the relationships R vs. r, R vs. A, and R vs. P; while the relationship R vs. LP has positive allometric growth.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[sand dollar]]></kwd>
<kwd lng="en"><![CDATA[petaloids]]></kwd>
<kwd lng="en"><![CDATA[allometry]]></kwd>
<kwd lng="en"><![CDATA[morphometry]]></kwd>
<kwd lng="en"><![CDATA[Pacific Ocean]]></kwd>
<kwd lng="es"><![CDATA[galleta de mar]]></kwd>
<kwd lng="es"><![CDATA[petaloides]]></kwd>
<kwd lng="es"><![CDATA[alometría]]></kwd>
<kwd lng="es"><![CDATA[morfometría]]></kwd>
<kwd lng="es"><![CDATA[Océano Pacífico]]></kwd>
</kwd-group>
</article-meta>
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