<?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>S1405-33222025000100101</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2025v77n1a241224</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A Turonian pycnodontiform fish from the San José de Gracia Quarry, Puebla, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Un pez pycnodontiforme turoniano de la Cantera San José de Gracia, Puebla, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco Ordaz]]></surname>
<given-names><![CDATA[Stephanie]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-López]]></surname>
<given-names><![CDATA[Alvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado-Ortega]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Bachillerato General Sor Juana Inés de la Cruz  ]]></institution>
<addr-line><![CDATA[Chalchicomula de Sesma Puebla]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</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=S1405-33222025000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222025000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222025000100101&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT We report the presence of pycnodontiform fishes in the Turonian marine deposits of the Mexcala Formation, exposed in the San José de Gracia Quarry in the Municipality of Molcaxac, Puebla, central Mexico. This report includes a complete, articulated, and superficially poorly preserved specimen. This specimen has some peculiar osteological features for example: the supraorbital skull region is peculiarly prominent and rounded; its neural and hemal arcocentra have long, sharp lateral flanges that interlock with those of the contiguous arcocentra, forming tight and complex zigzagging suture; and its vomerine and pre-articular teeth have a flat and concave medial surface and lateral edges with aligned serrations and cusps. These along with other features are sufficient to allow us to conclusively identify this fish as a member of the order Pycnodontiformes, suborder Pycnodontoidei, family Pycnodontidae, and subfamily Nursalliinae. Comparison of the species within the subfamily allows us to identify the specimen of San José de Gracia as Paranursallia gutturosa, previously only known from northwestern Africa. In Addition, similar fossil fishes of the Agua Nueva Formation, previously recovered at sites such as the Vallecillo quarries in Nuevo León, Huehuetla in Puebla, and Xilitla in San Luis Potosí, suggest that these represent the same species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se reporta la presencia de peces picnodontiformes en los depósitos marinos del Turoniense de la Formación Mexcala, expuestos en la Cantera San José de Gracia en el Municipio de Molcaxac, Puebla, centro de México. Este reporte incluye un espécimen completo, articulado y superficialmente mal preservado. Este espécimen tiene algunas características osteológicas peculiares, por ejemplo: la región supraorbitaria del cráneo es peculiarmente prominente y redondeada; sus arcocentros neurales y hemales tienen bridas laterales largas y afiladas que se entrelazan con las de los arcocentros contiguos, formando una sutura en zigzag apretada y compleja; y sus dientes vomerianos y prearticulares tienen una superficie medial plana y cóncava y bordes laterales con serraciones y cúspides alineadas. Estas, junto con otras características, son suficientes para permitirnos identificar de manera concluyente a este pez como miembro del orden Pycnodontiformes, suborden Pycnodontoidei, familia Pycnodontidae y subfamilia Nursalliinae. La comparación de las especies dentro de la subfamilia permite identificar el ejemplar de San José de Gracia como Paranursallia gutturosa, anteriormente solo conocido en el noroeste de África. Además, peces fósiles similares de la Formación Agua Nueva, recuperados previamente en sitios como las canteras de Vallecillo en Nuevo León, Huehuetla en Puebla y Xilitla en San Luis Potosí, sugieren que representan la misma especie.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Turonian]]></kwd>
<kwd lng="en"><![CDATA[Pycnodontiformes]]></kwd>
<kwd lng="en"><![CDATA[Paranursallia gutturosa]]></kwd>
<kwd lng="en"><![CDATA[Cantera San José de Gracia]]></kwd>
<kwd lng="en"><![CDATA[Puebla]]></kwd>
<kwd lng="es"><![CDATA[Turoniano]]></kwd>
<kwd lng="es"><![CDATA[Pycnodontiformes]]></kwd>
<kwd lng="es"><![CDATA[Paranursallia gutturosa]]></kwd>
<kwd lng="es"><![CDATA[Cantera San José de Gracia]]></kwd>
<kwd lng="es"><![CDATA[Puebla]]></kwd>
</kwd-group>
</article-meta>
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