<?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>1405-888X</journal-id>
<journal-title><![CDATA[TIP. Revista especializada en ciencias químico-biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[TIP]]></abbrev-journal-title>
<issn>1405-888X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Estudios Superiores Zaragoza]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-888X2008000200081</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y ultraestructura de la gónada de los machos de Bufo fustiger (Anura:Bufonidae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanz-Ochotorena]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segura-Valdez]]></surname>
<given-names><![CDATA[María de Lourdes]]></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[Lara-Martínez]]></surname>
<given-names><![CDATA[Reyna]]></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-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Habana Facultad de Biología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Facultad de Ciencias Depto. de Biología Celular]]></institution>
<addr-line><![CDATA[México, D.F ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2008</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>81</fpage>
<lpage>86</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-888X2008000200081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-888X2008000200081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-888X2008000200081&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Por primera vez se describe la morfología y ultraestructura de la gónada de los machos del sapo endémico de Cuba, Bufo fustiger. Fueron colectados ocho ejemplares adultos en el área de La Chorrera en la provincia Pinar del Río los cuales fueron trasladados al laboratorio y tratados adecuadamente. Se procesaron las gónadas para ser observadas por microscopía de luz y microscopía electrónica de transmisión (MET). Se utilizó el microscopio de fuerza atómica para la observación de espermatozoides. Los resultados indican que la gónada de los machos tiene un órgano de Bidder en posición anterior. La parte correspondiente al testículo muestra una organización en túbulos seminíferos y dentro de éstos las células sexuales (espermatogonias, espermatocitos I y II, espermátidas en diferenciación y espermatozoides) están dispuestas en cistos de forma similar a otros anuros lo cual indica una conservación de esta característica dentro de los anfibios y los anamniotas. Se observan espermátidas al MET en el proceso de espermiogénesis con la presencia de mitocondrias y la formación del acrosoma. El espermatozoide es delgado, con la cabeza cónica. La cola tiene un axonema con el patrón microtubular 9 + 2 y se observaron espermatozoides con dos colas. No se detectó la presencia de membrana ondulante. Esto resultados pudieran contribuir a esclarecer la sistemática del grupo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Morphology and ultrastructure of the male gonad of the endemic toad to Cuba, Bufo fustiger was described. Eight adults were collected in the area of La Chorrera in Pinar del Rio province. They were transferred to the laboratory and treated properly. Gonads were processed to be observed by light microscopy and transmission electron microscopy (&#1058;&#1045;&#1052;). We used the atomic force microscope to observe spermatozoa. The results indicate that in anterior position the male gonad has a Bidder organ. The proper testis shows an organization in seminiferous tubules, and within these, sex cells (spermatogonia, spermatocytes I and II, spermatids in differentiation and spermatozoa) are arranged in the form of cysts similar to other anurans which indicates a conservation of this feature within amphibians and anamniotas. Spermatids with the presence of mitochondria and the formation of the acrosom were observed by &#1058;&#1045;&#1052; in spermiogenesis process. The sperm is thin, with a conical head. The tail has an axonema pattern with 9+2 microtubules. Also were observed spermatozoa with two tails. Was not detected the presence of undulating membrane. These results could help shed light on the taxonomy of the group.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Anura]]></kwd>
<kwd lng="es"><![CDATA[Bidder]]></kwd>
<kwd lng="es"><![CDATA[Bufo fustiger]]></kwd>
<kwd lng="es"><![CDATA[gónadas]]></kwd>
<kwd lng="es"><![CDATA[ultraestructura]]></kwd>
<kwd lng="en"><![CDATA[Anura]]></kwd>
<kwd lng="en"><![CDATA[Bidder]]></kwd>
<kwd lng="en"><![CDATA[Bufo fustiger]]></kwd>
<kwd lng="en"><![CDATA[male gonads]]></kwd>
<kwd lng="en"><![CDATA[ultrastructure]]></kwd>
</kwd-group>
</article-meta>
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