On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico

The discovery of the first Mexican fossil specimen belonging to the species Xiphactinus audax is reported here. This specimen was recovered in the Coniacian-Campanian marine deposits of the Austin Group at the Piedritas site, within the homonymous ejido, Municipality of Ocampo, north of Coahuila. Al...

Descripción completa

Detalles Bibliográficos
Autores: Alvarado-Ortega, Jesús, Porras-Múzquiz, Héctor Gerardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Revista Mexicana de Ciencias Geológicas
Idioma:inglés
OAI Identifier:oai:ojs.rmcg.geociencias.unam.mx:article/1684
Acceso en línea:http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1684
Access Level:acceso abierto
id MX_39d8a6bb9dbca0d8d6fb66ffe8a9b001
oai_identifier_str oai:ojs.rmcg.geociencias.unam.mx:article/1684
network_acronym_str MX
network_name_str México
repository_id_str
spelling On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern MexicoSobre la presencia de Xiphactinus (Teleostei, Ichthyodectiformes) en los depósitos marinos del Coniaciano-Campaniano del sitio Piedritas, Coahuila, norte de MéxicoAlvarado-Ortega, JesúsPorras-Múzquiz, Héctor GerardoThe discovery of the first Mexican fossil specimen belonging to the species Xiphactinus audax is reported here. This specimen was recovered in the Coniacian-Campanian marine deposits of the Austin Group at the Piedritas site, within the homonymous ejido, Municipality of Ocampo, north of Coahuila. Although the specimen is strongly fragmentary, partially preserved by impressions or molds of the bones, and only shows parts of the head, the opercular series, and the pectoral fins, this has enough anatomical features that allow its specific taxonomic determination. Among these diagnostic features, this fossil has a well-developed ethmopalatine bone, a well-developed supraoccipital crest, a maxilla anteriorly higher than the rest of the bone, and a very robust palatine articular head. Particularly, this fossil exhibits two distinctive features of the genus Xiphactinus, a row of conical teeth, irregularly sized and distributed in the maxilla and dentary bones, as well as a pectoral radius 1 extremely developed and at least 2.5 times wider than the subsequent ray. At the same time, its teeth are smooth and have no sharp edges or carenae, which allows its specific identification. The present discovery complements the geographical distribution of Xiphactinus confirming its wide longitudinal distribution throughout America.Se reporta el hallazgo del primer ejemplar fósil mexicano perteneciente de la especie Xiphactinus audax, recuperado en los depósitos marinos del Coniaciano-Campaniano del Grupo Austin del sitio Piedritas, dentro del ejido homónimo, Municipio de Ocampo, al norte Coahuila. A pesar de que el ejemplar es fragmentario, en partes conservado por impresiones o moldes de los huesos y solo conserva partes de la cabeza, la serie opercular y la cintura y aletas pectorales, en este se conservan suficientes rasgos anatómicos que permiten su determinación taxonómica especifica. Entre estos rasgos diagnósticos de este fósil es posible observar la presencia de un hueso etmopalatino bien desarrollado, una cresta supraoccipital grande, un maxilar anteriormente más alto que el resto del hueso y una cabeza articular del palatino muy robusta. De manera particular, este fósil exhibe dos rasgos distintivos del género Xiphactinus, una hilera de dientes cónicos, de talla irregular e irregularmente dispersos en la maxila y mandíbula, así como un radio pectoral 1 peculiarmente muy desarrollado y al menos 2.5 veces más ancho que el siguiente radio de esta aleta. Al mismo tiempo, los dientes de este pez son lisos y no presentan bordes cortantes o carenas, lo que permite su determinación especifica. Este hallazgo complementa la distribución geográfica de Xiphactinus y confirma su amplia distribución longitudinal a través de toda América.Universidad Nacional Autónoma de México2022-07-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/168410.22201/cgeo.20072902e.2022.2.1684Revista Mexicana de Ciencias Geológicas; Vol 39 No 2 (2022); 142-150Revista Mexicana de Ciencias Geológicas; Vol 39 No 2 (2022); 142-1502007-29021026-877410.22201/cgeo.20072902e.2022.2reponame:Revista Mexicana de Ciencias Geológicasinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMenghttp://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1684/1461Copyright (c) 2022 Revista Mexicana de Ciencias Geológicashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessoai:ojs.rmcg.geociencias.unam.mx:article/16842024-08-16T19:51:54Z
dc.title.none.fl_str_mv On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
Sobre la presencia de Xiphactinus (Teleostei, Ichthyodectiformes) en los depósitos marinos del Coniaciano-Campaniano del sitio Piedritas, Coahuila, norte de México
title On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
spellingShingle On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
Alvarado-Ortega, Jesús
title_short On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
title_full On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
title_fullStr On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
title_full_unstemmed On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
title_sort On the presence of Xiphactinus (Teleostei, Ichthyodectiformes) in the Coniacian-Campanian marine deposits of the Piedritas site, Coahuila, northern Mexico
dc.creator.none.fl_str_mv Alvarado-Ortega, Jesús
Porras-Múzquiz, Héctor Gerardo
author Alvarado-Ortega, Jesús
author_facet Alvarado-Ortega, Jesús
Porras-Múzquiz, Héctor Gerardo
author_role author
author2 Porras-Múzquiz, Héctor Gerardo
author2_role author
description The discovery of the first Mexican fossil specimen belonging to the species Xiphactinus audax is reported here. This specimen was recovered in the Coniacian-Campanian marine deposits of the Austin Group at the Piedritas site, within the homonymous ejido, Municipality of Ocampo, north of Coahuila. Although the specimen is strongly fragmentary, partially preserved by impressions or molds of the bones, and only shows parts of the head, the opercular series, and the pectoral fins, this has enough anatomical features that allow its specific taxonomic determination. Among these diagnostic features, this fossil has a well-developed ethmopalatine bone, a well-developed supraoccipital crest, a maxilla anteriorly higher than the rest of the bone, and a very robust palatine articular head. Particularly, this fossil exhibits two distinctive features of the genus Xiphactinus, a row of conical teeth, irregularly sized and distributed in the maxilla and dentary bones, as well as a pectoral radius 1 extremely developed and at least 2.5 times wider than the subsequent ray. At the same time, its teeth are smooth and have no sharp edges or carenae, which allows its specific identification. The present discovery complements the geographical distribution of Xiphactinus confirming its wide longitudinal distribution throughout America.
publishDate 2022
dc.date.none.fl_str_mv 2022-07-26
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1684
10.22201/cgeo.20072902e.2022.2.1684
url http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1684
identifier_str_mv 10.22201/cgeo.20072902e.2022.2.1684
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1684/1461
dc.rights.none.fl_str_mv Copyright (c) 2022 Revista Mexicana de Ciencias Geológicas
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2022 Revista Mexicana de Ciencias Geológicas
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Ciencias Geológicas; Vol 39 No 2 (2022); 142-150
Revista Mexicana de Ciencias Geológicas; Vol 39 No 2 (2022); 142-150
2007-2902
1026-8774
10.22201/cgeo.20072902e.2022.2
reponame:Revista Mexicana de Ciencias Geológicas
instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron:UNAM
instname_str UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron_str UNAM
institution UNAM
reponame_str Revista Mexicana de Ciencias Geológicas
collection Revista Mexicana de Ciencias Geológicas
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1858174946200518656
score 15,811543

Similares en LA Referencia