<?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>0256-7024</journal-id>
<journal-title><![CDATA[Revista Geológica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geol. Amér. Central]]></abbrev-journal-title>
<issn>0256-7024</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0256-70242022000100001</article-id>
<article-id pub-id-type="doi">10.15517/rgac.v66i0.48587</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Megalonychid Sloths from the Early Late Hemphillian (Late Miocene), Curré Formation, San Gerardo de Limoncito, Costa Rica]]></article-title>
<article-title xml:lang="es"><![CDATA[Perezosos Megalonychidos del Hemphilliano Tardío Temprano (Mioceno Tardío), Formación Curré, San Gerardo de Limoncito, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valerio]]></surname>
<given-names><![CDATA[Ana L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Laurito]]></surname>
<given-names><![CDATA[César]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[McDonald]]></surname>
<given-names><![CDATA[H. Gregory]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rincón]]></surname>
<given-names><![CDATA[Ascanio D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,National Museum of Costa Rica (MNCR by its acronym in Spanish) Natural History Department ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Independent consultant  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colorado State Office Bureau of Land Management ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Venezuelan Institute for Scientific Research (IVIC by its acronym in Spanish) Paleontology Laboratory Ecology Center]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<numero>66</numero>
<fpage>1</fpage>
<lpage>15</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242022000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242022000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242022000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A reevaluation of the late Miocene (early late Hemphillian) megalonychid fossils found at San Gerardo de Limoncito, Coto Brus Valley, Costa Rica is presented. These specimens which had previously been referred to Pliometanastes cf. P. protistus, based on a partial mandible and associated teeth material are now considered to belong to the genus Zacatzontli, previously only known from the late Miocene of Mexico and here reported for the first time from Costa Rica. The material is considered to be a new species of Zacatzontli based on a comparison with the type and other members of the Megalonychidae from the Hemphillian of North America as Zacatzontli tecolotlanensis, Pliometanastes protistus and Megalonyx spp.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se reevalúan los fósiles de Megalonychidae del Mioceno Tardío (Hemphilliano Tardío Temprano) de Costa Rica, procedentes de la localidad San Gerardo de Limoncito, Valle de Coto Brus. Los restos fósiles fueron inicialmente referidos a Pliometanastes cf. P. protistus con base en el material dental y mandibular. Estos son ahora asignados al género Zacatzontli, previamente conocido para el Mioceno tardío de México y que ahora se registra por primera vez para Costa Rica en América Central. El material es considerado como una nueva especie de Zacatzontli, basado en la comparación con otros Megalonychidae del Hemphilliano de América del Norte como Zacatzontli tecolotlanensis, Pliometanastes protistus and Megalonyx spp.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Xenarthra]]></kwd>
<kwd lng="en"><![CDATA[Megalonychidae]]></kwd>
<kwd lng="en"><![CDATA[Zacatzontli]]></kwd>
<kwd lng="en"><![CDATA[Late Miocene: Curré Formation]]></kwd>
<kwd lng="en"><![CDATA[San Gerardo de Limoncito]]></kwd>
<kwd lng="en"><![CDATA[Costa Rica]]></kwd>
<kwd lng="es"><![CDATA[Xenarthra]]></kwd>
<kwd lng="es"><![CDATA[Megalonychidae]]></kwd>
<kwd lng="es"><![CDATA[Zacatzontli]]></kwd>
<kwd lng="es"><![CDATA[Mioceno Tardío]]></kwd>
<kwd lng="es"><![CDATA[Formación Curré]]></kwd>
<kwd lng="es"><![CDATA[San Gerardo de Limoncito]]></kwd>
<kwd lng="es"><![CDATA[Costa Rica]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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