<?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>S1870-34532021000100340</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2021.92.3503</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Biology of the oldest butterfly species in the world, Baronia brevicornis: food, abundance, polymorphism, and survival]]></article-title>
<article-title xml:lang="es"><![CDATA[Biología de la mariposa más antigua del mundo, Baronia brevicornis: alimento, abundancia, polimorfismo y supervivencia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galicia-Mendoza]]></surname>
<given-names><![CDATA[Ivette]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pineda-García]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oyama]]></surname>
<given-names><![CDATA[Ken]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cordero-Rivera]]></surname>
<given-names><![CDATA[Adolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio-Beristain]]></surname>
<given-names><![CDATA[Marcela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Garduño]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Escuela Nacional de Estudios Superiores ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Vigo Departamento de Ecoloxía e Bioloxía Animal Laboratorio ECOEVO]]></institution>
<addr-line><![CDATA[Pontevedra Galicia]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Centro de Investigación en Biodiversidad y Conservación ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>92</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532021000100340&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532021000100340&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532021000100340&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The study of the basic biology of panchronic species could help understand their persistence through geological time. One of the least studied panchronic species is Baronia brevicornis Salvin (Lepidoptera: Papilionidae), the oldest known butterfly species endemic to Mexico. Here we report on our findings from studying a population of B. brevicornis in Sierra de Huautla, Morelos, for 3 years. In this population we identified 3 male and 3 female color morphs, making it perhaps the most complex polymorphism described yet for a panchronic species. We found a balanced sex ratio in newly emerged adults but a sex ratio biased to males at reproductive sites. Significantly, we found adults of the butterfly only on patches of the host plant Vachellia campechiana (Mill.) Seigler &amp; Ebinger (Fabaceae) that also offered feeding sources for adults and report for the first-time adults feeding on 5 plant species. Additionally, differences in water use in trees of V. campechiana in zones with or without B. brevicornis suggest a relationship between butterfly food sources and plant water expenditure. Our findings on B. brevicornis could be used to develop conservation plans for this species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El estudio de la biología básica de especies pancrónicas podría ayudar a entender su persistencia a través del tiempo geológico. Una de las especies pancrónicas menos estudiadas es Baronia brevicornis Salvin (Lepidoptera:Papilionidae), una mariposa endémica de México y la especie más antigua del mundo. Estudiamos por 3 años una población de B. brevicornis en la sierra de Huautla, Morelos. En esta población identificamos 3 morfos de color en los machos y 3 en las hembras, quizás el polimorfismo más complejo descrito para especies pancrónicas. También encontramos que la proporción sexual es balanceada en los adultos recién emergidos, pero sesgada hacia los machos en los sitios reproductivos. De manera importante, solamente encontramos mariposas en los parches de Vachellia campechiana (Mill.) Seigler &amp; Ebinger (Fabaceae), que además tenían plantas de las que se podían alimentar los adultos, y aquí reportamos por primera vez que los adultos se alimentan de 5 especies de plantas. Asimismo, las diferencias en uso del agua de V. campechiana en zonas con y sin B. brevicornis sugieren una relación entre las fuentes de alimentos de las mariposas y el gasto de agua de las plantas. Nuestros hallazgos pueden ser fundamentales para desarrollar planes de conservación para B. brevicornis.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Panchronic species]]></kwd>
<kwd lng="en"><![CDATA[Lepidoptera]]></kwd>
<kwd lng="en"><![CDATA[Papilionidae]]></kwd>
<kwd lng="en"><![CDATA[Baroniinae]]></kwd>
<kwd lng="en"><![CDATA[Threatened species]]></kwd>
<kwd lng="en"><![CDATA[Conservation]]></kwd>
<kwd lng="es"><![CDATA[Especie pancrónica]]></kwd>
<kwd lng="es"><![CDATA[Lepidoptera]]></kwd>
<kwd lng="es"><![CDATA[Papilionidae]]></kwd>
<kwd lng="es"><![CDATA[Baroniinae]]></kwd>
<kwd lng="es"><![CDATA[Especie amenazada]]></kwd>
<kwd lng="es"><![CDATA[Conservación]]></kwd>
</kwd-group>
</article-meta>
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