Upper Cretaceous Enchodontidae (Actinopterygii: Aulopiformes) in the La Luna formation, Eastern Cordillera, Colombia: A new report

IF 1.7 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Journal of South American Earth Sciences Pub Date : 2024-09-13 DOI:10.1016/j.jsames.2024.105160
José Manuel Torres-Parada , Johanset Orihuela León , Germán David Patarroyo Camargo , Carlos Mario Alarcón Gómez , Jefferson Steeven Diaz Villamizar , Juan Sebastián Gómez-Coronado , José Javier Márquez Prada
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引用次数: 0

Abstract

The fossil record of Upper Cretaceous fishes in Colombia is particularly scarce, with only eleven previously identified species. This study presents the first comprehensive report of the extinct aulopiform fish family Enchodontidae from the Eastern Cordillera of Colombia. Fieldwork in the municipality of Matanza (Santander Department) yielded five fossil specimens, including jaw and skull fragments. These specimens were collected from the Upper Cretaceous La Luna Formation and were described and examined to approximate their taxonomic affinity, depositional environment, and geological age. Detailed morphological analyses associate these new specimens with the genus Enchodus. Our findings provide new data that contribute to the understanding of Enchodus diversity and distribution. The presence of key diagnostic characters in our specimens aligns with established phylogenetic frameworks, while further highlighting the potential for the presence of new species within this record.

Resumen

El registro fósil de peces del Cretácico Superior en Colombia es notablemente escaso, con solo once especies previamente identificadas. Este estudio presenta el primer registro de la familia de peces extintos Enchodontidae para la Cordillera Oriental de Colombia. El trabajo de campo en el municipio de Matanza (Departamento de Santander) produjo cinco especímenes fósiles, incluidos fragmentos de mandíbulas y cráneos. Estos especímenes fueron recolectados de la Formación La Luna del Cretácico Superior y analizados para establecer su afinidad taxonómica, ambiente de deposición y edad geológica. Los análisis morfológicos detallados asocian estos nuevos especímenes con el género Enchodus. Nuestros hallazgos aportan nuevos y valiosos datos que contribuyen a la comprensión de la diversidad y distribución de Enchodus. La presencia de caracteres diagnósticos clave en nuestros especímenes se alinea con las hipótesis filogenéticas establecidas, al tiempo que destaca el potential de nuevas especies dentro del registro aquí tratado.

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哥伦比亚东科迪勒拉山系 La Luna 地层中的上白垩世 Enchodontidae (Actinopterygii: Aulopiformes):一份新报告
哥伦比亚的上白垩世鱼类化石记录尤为稀少,此前仅发现 11 个物种。本研究首次全面报告了哥伦比亚东科迪勒拉山系已灭绝的乌头形鱼科(Enchodontidae)。在桑坦德省马坦萨市(Matanza)的实地考察中发现了五件化石标本,包括下颚和头骨碎片。这些标本采集自上白垩世的拉卢纳地层(La Luna Formation),经过描述和检验,大致确定了它们在分类学上的亲缘关系、沉积环境和地质年代。详细的形态分析将这些新标本与 Enchodus 属联系起来。我们的发现提供了新的数据,有助于了解 Enchodus 的多样性和分布情况。我们的标本中存在的关键诊断特征与已建立的系统发育框架相吻合,同时进一步强调了这一记录中存在新物种的可能性。 摘要哥伦比亚晚白垩世鱼类的化石记录非常稀少,之前仅鉴定出 11 个物种。本研究首次记录了哥伦比亚东科迪勒拉山系已灭绝鱼类 Enchodontidae。在桑坦德省马坦萨市(Matanza)的实地考察中发现了五件化石标本,包括下颚和头骨的碎片。这些标本采集自上白垩世的拉卢纳地层(La Luna Formation),通过分析确定了它们在分类学上的亲缘关系、沉积环境和地质年代。详细的形态分析将这些新标本与 Enchodus 属联系起来。我们的发现提供了宝贵的新数据,有助于了解 Enchodus 的多样性和分布情况。我们的标本中存在的关键诊断特征与已确立的系统发育假说相吻合,同时也凸显了本文所讨论的记录中可能存在的新物种。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of South American Earth Sciences
Journal of South American Earth Sciences 地学-地球科学综合
CiteScore
3.70
自引率
22.20%
发文量
364
审稿时长
6-12 weeks
期刊介绍: Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.
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