<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222025000100105</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2025v77n1a231024</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Trace fossils from the middle Aptian sedimentary succession of the Bellezma Mountains, NE Algeria]]></article-title>
<article-title xml:lang="es"><![CDATA[Icnofósiles de la secuencia sedimentaria del Aptiano medio de las montañas Bellezma, NE Argelia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bouchemla]]></surname>
<given-names><![CDATA[Imad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benyoucef]]></surname>
<given-names><![CDATA[Madani]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garah]]></surname>
<given-names><![CDATA[Abdelmoumen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salamon]]></surname>
<given-names><![CDATA[Mariusz A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Krajewski]]></surname>
<given-names><![CDATA[Marcin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Slami]]></surname>
<given-names><![CDATA[Rafika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Mouloud Mammeri University of Tizi-Ouzou Faculty of Biological and Agricultural Sciences Department of Geological Sciences]]></institution>
<addr-line><![CDATA[Tizi-Ouzou ]]></addr-line>
<country>Algeria</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Mustapha Stambouli University of Mascara Laboratory of Geomatics, Ecology and Environment ]]></institution>
<addr-line><![CDATA[Mascara ]]></addr-line>
<country>Algeria</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Université de Batna 2 Institut des Sciences de la Terre et de l&#8217;Univ-ers ]]></institution>
<addr-line><![CDATA[Batna ]]></addr-line>
<country>Algeria</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,University of Silesia in Katowice Institute of Earth Sciences Faculty of Natural Sciences]]></institution>
<addr-line><![CDATA[Sosnowiec ]]></addr-line>
<country>Poland</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,GH University of Krakow Faculty of Geology, Geophysics and Environmental Protection ]]></institution>
<addr-line><![CDATA[Kraków ]]></addr-line>
<country>Poland</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>77</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222025000100105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222025000100105&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222025000100105&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The Aptian sedimentary succession exposed in the southern Bellezma Mountains contains a low diversity trace fossil assemblage, with ichnofossils being common in the middle part of the studied section. The recorded trace fossils comprise eight ichnogenera: Archaeonassa, Cochlichnus, Chondrites, Gyrochorte, Palaeophycus, Protovirgularia, Rhizocorallium, and Thalassinoides. Ethologically, these ichnogenera display feeding, crawling, and dwelling activities of epi- and infaunal organisms. The presence of these trace fossils is mainly related to the activity of the deposit feeders, due to the accumulation of nutrients on the seafloor in unconsolidated, poorly sorted, soft substrate after storms under good environmental conditions. Together with sedimentological features, the ichnoassemblage suggests that the studied Aptian sedimentary succession was deposited in the upper offshore zone, corresponding to the Cruziana ichnofacies. These trace fossils are reported herein for the first time in the Bellezma Mountains. Furthermore, this study represents the first investigation of Mesozoic trace fossils in eastern Algeria.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La sucesión sedimentaria del Aptiense expuesta en el sur de las montañas de Bellezma contiene un conjunto de trazas fósiles de baja diversidad, siendo comunes los icnofósiles en la parte media de la sección estudiada. Los fósiles registradas comprenden ocho icnogéneros: Archaeonassa, Cochlichnus, Chondrites, Gyrochorte, Palaeophycus, Protovirgularia, Rhizocorallium y Thalassinoides. Desde el punto de vista etológico, estos icnogéneros corresponden a actividades de alimentación, reptación y habitación de organismos epi e infaunales. La presencia de estas trazas fósiles se atribuye principalmente a la actividad de organismos depositívoros, debido a la acumulación de provisión de nutrientes en el fondo marino dentro de un sustrato blando no consolidado y mal clasificado tras eventos de tormentas bajo buenas condiciones ambientales. Junto con las características sedimentológicas, la icnoasociación sugiere que la sucesión sedimentaria aptiense estudiada se depositó en la zona superior de la antecosta (offshore), correspondiendo a la icnofacies de Cruziana. Estos icnofósiles se presentan aquí por primera vez para las montañas de Bellezma. Además, este estudio representa la primera investigación sobre icnofósiles mesozoicos en el este de Argelia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[ichnofossils]]></kwd>
<kwd lng="en"><![CDATA[palaeoenvironment]]></kwd>
<kwd lng="en"><![CDATA[offshore zone]]></kwd>
<kwd lng="en"><![CDATA[Aptian]]></kwd>
<kwd lng="en"><![CDATA[Bellezma Mountains]]></kwd>
<kwd lng="es"><![CDATA[icnofósiles]]></kwd>
<kwd lng="es"><![CDATA[paleoambiente]]></kwd>
<kwd lng="es"><![CDATA[zona antecosta]]></kwd>
<kwd lng="es"><![CDATA[Aptiense]]></kwd>
<kwd lng="es"><![CDATA[Montañas de Bellezma]]></kwd>
</kwd-group>
</article-meta>
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