<?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>2304-0106</journal-id>
<journal-title><![CDATA[Anales de la Academia de Ciencias de Cuba]]></journal-title>
<abbrev-journal-title><![CDATA[Anales de la ACC]]></abbrev-journal-title>
<issn>2304-0106</issn>
<publisher>
<publisher-name><![CDATA[Academia de Ciencias de Cuba]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2304-01062021000300007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Aportes al conocimiento de la morfología microscópica de las gónadas de anfibios y reptiles cubanos]]></article-title>
<article-title xml:lang="en"><![CDATA[Contributions to the knowledge of microscopic morphology of the gonads of Cuban amphibians and reptiles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanz Ochotorena]]></surname>
<given-names><![CDATA[Ana Clara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Gómez]]></surname>
<given-names><![CDATA[Yamilka]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segura Valdéz]]></surname>
<given-names><![CDATA[María de Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez García]]></surname>
<given-names><![CDATA[Luis Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lara Martínez]]></surname>
<given-names><![CDATA[Reyna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iturriaga Monsisbay]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Cabrera]]></surname>
<given-names><![CDATA[Tomás Michel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Habana Facultad de Biología ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Ecología y Sistemática (IES)  ]]></institution>
<addr-line><![CDATA[ La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>11</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2304-01062021000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2304-01062021000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2304-01062021000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Se reconoce la importancia ecológica de los anfibios y reptiles, vitales en el funcionamiento de los ecosistemas y con patrones de reproducción diversos. No existen muchos estudios en biología de la reproducción en especies cubanas. El objetivo es mostrar el impacto de los estudios histológicos y ultraestructurales de las gónadas de anfibios y reptiles cubanos en la determinación del estado reproductivo del ejemplar y las etapas de la gametogénesis.  Métodos:  Se recolectaron once ranas del género Eleutherodactylus, un hílido y ocho sapos del género Peltophryne, además de tres especies de lagartijas; dos lagartos, un geckónido y cinco serpientes. Se procesaron las gónadas de ambos sexos con histología clásica, inmunofluorescencia, microscopía electrónica de transmisión y microscopía de fuerza atómica.  Resultados:  En anfibios y reptiles los ovocitos se clasifican en previtelogénicos, vitelogénicos y postvitelogénicos, acorde al proceso de síntesis y deposición del vitelo. Se aprecia una mayor cantidad de ovocitos vitelogénicos en etapa reproductiva. Los testículos contienen lóbulos seminíferos en anfibios donde tiene lugar la espermatogénesis cística y túbulos en reptiles, con espermatogénesis radial. Se identificó el órgano de Bidder en los sapos machos y en una hembra. La morfología de los espermatozoides en anfibios es similar incluso a nivel ultraestructural, y diferente entre los lagartos y las serpientes. Conclusiones: la histología clásica establece diferencias a nivel celular en ovarios y testículos, aspecto esencial para describir los ciclos gonadales que se suceden en anfibios y reptiles. Los caracteres histológicos y ultraestructurales permitieron describir los tipos celulares de la gametogénesis.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: The ecological importance of amphibians and reptiles, vital in the functioning of ecosystems and with diverse reproduction patterns, is recognized. There are not many studies in the biology of reproduction in Cuban species. The objective is to show the impact of histological and ultrastructural studies of the gonads of Cuban amphibians and reptiles in determining the reproductive status of the specimen and the stages of gametogenesis.  Methods: Eleven frogs of the genus Eleutherodactylus, one hylid and eight toads of the genus Peltophryne were collected, in addition to three species of lizards; two lizards, a geckonid and five snakes. The gonads of both sexes were processed with classical histology, immunofluorescence, transmission electron microscopy, and atomic force microscopy.  Results: In amphibians and reptiles, oocytes are classified as previtellogenic, vitellogenic and postvitellogenic, according to the process of synthesis and deposition of yolk. There is a greater number of vitellogenic oocytes in the reproductive stage. The testes contain seminiferous lobes in amphibians where cystic spermatogenesis takes place and tubules in reptiles, with radial spermatogenesis. Bidder's organ was identified in male and female toads. The morphology of sperm in amphibians is similar, even at the ultrastructural level, and different between lizards and snakes. Conclusions: classical histology establishes differences at the cellular level in ovaries and testes, an essential aspect to describe the gonadal cycles that occur in amphibians. and reptiles. The histological and ultrastructural characters allowed to describe the cell types of gametogenesis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[histología]]></kwd>
<kwd lng="es"><![CDATA[ultraestructura]]></kwd>
<kwd lng="es"><![CDATA[ovogénesis]]></kwd>
<kwd lng="es"><![CDATA[espermatogénesis]]></kwd>
<kwd lng="en"><![CDATA[histology]]></kwd>
<kwd lng="en"><![CDATA[ultrastructure]]></kwd>
<kwd lng="en"><![CDATA[oogenesis]]></kwd>
<kwd lng="en"><![CDATA[spermatogenesis]]></kwd>
</kwd-group>
</article-meta>
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