<?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>1405-2768</journal-id>
<journal-title><![CDATA[Polibotánica]]></journal-title>
<abbrev-journal-title><![CDATA[Polibotánica]]></abbrev-journal-title>
<issn>1405-2768</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-27682021000100043</article-id>
<article-id pub-id-type="doi">10.18387/polibotanica.51.3</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización de la variación morfológica de Cyanotetras (cyanobacteria) en el Lago de Catemaco Veracruz, México.]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization of morphological variation of Cyanotetras (cyanobacteria) in Catemaco Lake, Veracruz, México.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muciño-Márquez]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echenique]]></surname>
<given-names><![CDATA[R.O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gárate-Lizárraga]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa-Torres]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esquivel-Herrera]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana Laboratorio de Ficología ]]></institution>
<addr-line><![CDATA[Xochimilco ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de La Plata División Ficología Facultad de Ciencias Naturales y Museo]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Ciencias Marinas Departamento de Plancton y Ecología Marina]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento el Hombre y su ambiente ]]></institution>
<addr-line><![CDATA[ ]]></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>
<numero>51</numero>
<fpage>43</fpage>
<lpage>53</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-27682021000100043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-27682021000100043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-27682021000100043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Cyanotetras (Hindák, 1988), es un género poco conocido, planctónico y/o metafítico, propio de pequeños reservorios de agua continental, ligeramente eutróficos. Hasta la fecha, sólo se han descrito tres especies. El propósito del presente estudio es reportar dos taxa del género Cyanotetras encontrados en el Lago de Catemaco, Veracruz (México); incluyendo, además, la propuesta de una nueva variedad. Se recolectaron muestras en once sitios en el Lago de Catemaco, para evaluar la composición de la taxocenosis fitoplanctónica, así como las características de las variables físico-químicas. Se describen los taxa del género Cyanotetras halladas en el Lago de Catemaco: C. crucigenielloides, C. aerotopa, así como una nueva forma, C. crucigenielloides var. mexicana. Esta última fue abundante (2-165 x 103 céls L-1), en tanto que, C. aerotopa y C. crucigenielloides fueron especies raras (2-16 x 103 céls L-1). Debido a que no hay suficientes investigaciones del género Cyanotetras y sus respectivas especies, es necesario seguir realizando estudios de estas especies en el Lago de Catemaco, sobre todo, para C. crucigenielloides var. mexicana, la cual fue una especie abundante, debido a que no hay suficientes investigaciones sobre taxa pertenecientes a este género.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Cyanotetras (Hindák, 1988), is a poorly known planktonic and / or metaphytic genus of cyanobacteria, typical of small, slightly eutrophic reservoirs. To date, only three species have been described. The purpose of this study is to report two taxa of this genus found in Catemaco lake, Veracruz (Mexico), and to propose a new variety. Water samples were collected at eleven sites in Catemaco lake, to evaluate the composition of phytoplankton taxocenosis, as well as the characteristics of the physicochemical variables. This study described the species of the genus Cyanotetras, found in Catemaco lake: C. crucigenielloides, C. aerotopa, as well as a new form, C. crucigeniellodes var. mexicana. was an abundant species (2 - 165 x 103 cells L-1). Cyanotetras aerotopa and C. crucigenielloides were rare species (2-16 x 103 cells L-1). It is important to continue studying these species in Catemaco lake to improve the knowledge of the genus.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cianobacterias]]></kwd>
<kwd lng="es"><![CDATA[Cyanotetras]]></kwd>
<kwd lng="es"><![CDATA[fitoplancton]]></kwd>
<kwd lng="es"><![CDATA[Veracruz]]></kwd>
<kwd lng="en"><![CDATA[Cyanobacteria]]></kwd>
<kwd lng="en"><![CDATA[Cyanotetras]]></kwd>
<kwd lng="en"><![CDATA[phytoplankton]]></kwd>
<kwd lng="en"><![CDATA[Veracruz]]></kwd>
</kwd-group>
</article-meta>
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