<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532025000100403</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2025.96.5431</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Isocheles aequimanus (Paguroidea: Diogenidae), un nuevo registro de cangrejo ermitaño en la zona costera de Perú, con observaciones bioecológicas en bancos naturales de Ensis macha]]></article-title>
<article-title xml:lang="en"><![CDATA[Isocheles aequimanus (Paguroidea: Diogenidae), a new record of hermit crab for Peru, with bioecological observations in natural banks of Ensis macha]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Berrú-Paz]]></surname>
<given-names><![CDATA[Pedro Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nizama-Chapoñan]]></surname>
<given-names><![CDATA[Angelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto del Mar del Perú  ]]></institution>
<addr-line><![CDATA[Chimbote ]]></addr-line>
<country>Perú</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>
<volume>96</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532025000100403&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532025000100403&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532025000100403&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se identificó por primera vez en la región Ancash y el Perú, el cangrejo ermitaño Isocheles aequimanus (Dana, 1852), recolectado en las áreas de Mar Brava (09°16&#8217;57.39&#8221; S, 78°30&#8217;44.16&#8221; O) y Colorado (09°40&#8217;02.19&#8221; S, 78°19&#8217;21.59&#8221; O). Se describen sus caracteres taxonómicos y se analiza la asociación que existe con I. aequimanus y 8 conchas de gasterópodos (Nassarius dentifer, Polinices uber, Solatia buccionides, Stramonita biserialis, Thaissella chocolata, Trophon peruvianus, Xanthochorus buxea y Sinum cymba) que utiliza como habitáculo. Se estudiaron 231 ejemplares de I. aequimanus cuyas tallas variaron de 3.19 a 9.21 mm de longitud del escudo, con peso medio de 0.35 g. El 33.6% de los individuos fueron machos y 66.4% hembras. Las conchas de gasterópodos con mayor frecuencia de ocupación fueron N. dentifer con 59.7%, P. uber con 25.5%, S. buccionides con 6.9% y S. biserialis con 5.6%. Isocheles aequimanus se reporta como registro nuevo para las costas de Perú, incrementando el conocimiento de la riqueza específica de cangrejos ermitaños, promoviendo la necesidad de aumentar el esfuerzo en el estudio de la biodiversidad local y nacional, con el fin de cubrir vacíos informativos y establecer conexión geográfica con otros países de la región.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The hermit crab Isocheles aequimanus (Dana, 182), was first identified in the Ancash region of Peru, specifically in the Mar Brava (09°16&#8217;57.39&#8221; S, 78°30&#8217;44.16&#8221; W) and Colorado (09°40&#8217;02.19&#8221; S, 78°19&#8217;21.59&#8221; W) areas. This study describes its taxonomic characteristics and analyzes the association between I. aequimanus and eight gastropod shells (Nassarius dentifer, Polinices uber, Solatia buccionides, Stramonita biserialis, Thaissella chocolata, Trophon peruvianus, Xanthochorus buxea, and Sinum cymba) used as shelter. Two-hundred and thirty-one specimens of I. aequimanus were analized, ranging in size from 3.19 to 9.21 mm shield length, with an average weight of 0.35 g. Of the analyzed individuals, 33.6% were males and 66.4% were females. The gastropod shells with the highest occupancy frequency were N. dentifer with 59.7%, P. uber with 25.5%, S. buccionides with 6.9%, and S. biserialis with 5.6%. Isocheles aequimanus is reported as a new record from the coasts of Peru, increasing the knowledge of the specific richness of hermit crabs, promoting the need to increase efforts in the study of local and national biodiversity, in order to cover information gaps and establish geographic connections with other countries in the region.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Isocheles aequimanus]]></kwd>
<kwd lng="es"><![CDATA[Cangrejo ermitaño]]></kwd>
<kwd lng="es"><![CDATA[Conchas]]></kwd>
<kwd lng="es"><![CDATA[Selección de conchas]]></kwd>
<kwd lng="en"><![CDATA[Isocheles aequimanus]]></kwd>
<kwd lng="en"><![CDATA[Hermit crab]]></kwd>
<kwd lng="en"><![CDATA[Shells]]></kwd>
<kwd lng="en"><![CDATA[Shell selection]]></kwd>
</kwd-group>
</article-meta>
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