<?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>1659-4266</journal-id>
<journal-title><![CDATA[Cuadernos de Investigación UNED]]></journal-title>
<abbrev-journal-title><![CDATA[Cuadernos de Investigación UNED]]></abbrev-journal-title>
<issn>1659-4266</issn>
<publisher>
<publisher-name><![CDATA[Universidad Estatal a Distancia de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-42662020000100206</article-id>
<article-id pub-id-type="doi">10.22458/urj.v12i1.2802</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A new aestivation strategy for land molluscs: hanging upside down like bats]]></article-title>
<article-title xml:lang="es"><![CDATA[Una estrategia nueva de estivación en moluscos terrestres: colgarse como murciélagos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrientos1]]></surname>
<given-names><![CDATA[Zaidett]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Estatal a Distancia Vicerrectoría de Investigación Laboratorio de Ecología Urbana]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>12</volume>
<numero>1</numero>
<fpage>206</fpage>
<lpage>219</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-42662020000100206&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-42662020000100206&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-42662020000100206&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction: Many land molluscs survival strategies are still poorly understood or have not been even reported, especially in the Neotropics. Methods: I collected 25 adult Tikoconus.Tikoconus. costarricanus from Reserva Forestal Río Macho, Costa Rica. I kept the specimens for 8 days in terrariums to film their behavior. Objective: To analyse the behavior of T. costarricanus, with emphasis on its strategies to survive drought and probably also predation. Results: This snail has at least three unusual behaviors that probably help them reduce dehydration and may be escape from enemies and avoid diseases: hanging upside down like bats, falling and grooming. During aestivation, they compress the body and hang upside down from leaves, like bats hang from perches. They attach to the underside of leaves with mucus from a caudal gland. Disengagement is done with vigorous shell rotations and foot twisting in contorting sequences, and can be done as reaction to direct sunlight, and probably to avoid predators and parasites. They groom their own shell, shell lappets and foot, an unusual behavior among land snails. This species feeds mainly on epiphyllous mosses, algae and lichens, occasionally adding arthropod eggs and carrion. Egg laying is similar to other euconulids and valloniid snails. Conclusions: Aestivating hanging upside down is a drought avoiding trait described here for the first time and is also a new function for the caudal gland mucus. Leaf detaching is done by a contortion sequence of shell rotations and foot twisting; its complexity and duration varies according to the leaf side where the snail is located.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción: Muchas estrategias de sobrevivencia en moluscos terrestres todavía están poco estudiadas o no han sido descubiertas, especialmente en el Neotrópico. Métodos: Recolecté 25 adultos de Tikoconus .Tikoconus. costarricanus de la Reserva Forestal Río Macho, Costa Rica. Mantuve los especímenes 8 días en terrarios para grabar su comportamiento. Objetivo: Analizar el comportamiento de T. costarricanus, con énfasis en sus estrategias para sobrevivir a la desecación del ambiente y posiblemente a los depredadores. Resultados: Este caracol tiene al menos tres comportamientos inusuales que le ayudan a reducir la deshidratación y probablemente escapar de enemigos y evitar enfermedades: colgarse como murciélagos, tirarse y acicalarse. Durante la estivación, ellos contraen el cuerpo y se cuelgan cabeza abajo de hojas, como los murciélagos en sus perchas. Ellos se adhieren al envés de las hojas con mucus de su glándula caudal. Para poder tirarse de la vegetación desarrollan una serie de contorsiones compuestas de giros de la concha y torsiones del pie, lo hacen para evitar la incidencia directa de los rayos del sol, y posiblemente, depredadores y parásitos. Ellos acicalan su propia concha, lóbulos de la concha y pie. Esta especie se alimenta principalmente de musgos, algas y líquenes epífilos, ocasionalmente agregan huevos y cadáveres de artrópodos. Depositan sus huevos de manera similar a otros caracoles euconúlidos y vallónidos. Conclusiones: La estivación colgándose como murciélagos es una estrategia para evitar la desecación que se describe aquí por primera vez y representa una función nueva del mucus generado por la glándula caudal. Para separarse del sustrato hacen una secuencia de contorsiones con la concha y con el pie, cuya duración depende del lado de la hoja donde se encuentren.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[aestivation]]></kwd>
<kwd lng="en"><![CDATA[defensive behavior]]></kwd>
<kwd lng="en"><![CDATA[caudal gland]]></kwd>
<kwd lng="en"><![CDATA[grooming]]></kwd>
<kwd lng="es"><![CDATA[caracol terrestre]]></kwd>
<kwd lng="es"><![CDATA[estivación]]></kwd>
<kwd lng="es"><![CDATA[comportamiento de defensa]]></kwd>
<kwd lng="es"><![CDATA[glándula caudal]]></kwd>
<kwd lng="es"><![CDATA[acicalamiento]]></kwd>
</kwd-group>
</article-meta>
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