{"title":"Paleoenvironmental insights from the early Miocene oysters in the shallow-marine deposits of the Fırat formation in Diyarbakır, SE Turkey","authors":"İhsan Ekin","doi":"10.1016/j.annpal.2023.102660","DOIUrl":null,"url":null,"abstract":"<div><p>In the shallow-marine deposits of the Early Miocene (Aquitanian – Burdigalian) Fırat Formation exposed in the Eğil district of Diyarbakır, SE Turkey, three oyster species such as <em>Ostrea edulis</em> (Linnaeus, 1758), <em>Magallana gryphoides</em> (Schlotheim, 1820), and <em>Hyotissa hyotis</em> (Linnaeus, 1758) were recorded for the first time. The specimens collected include four individuals of <em>O.</em> <em>edulis</em> and three individuals of <em>M.</em> <em>gryphoides</em> from the Sağlam village area, and one individual of <em>H.</em> <em>hyotis</em> from the Sarıca village area in Eğil. These specimens were found in the yellow-limestone facies and beige-white marl facies, which represent the thickest and largest sections of the Fırat Formation. For the Sağlam village area, <em>O.</em> <em>edulis</em> suggests a littoral environment with excessive detrital inputs, ranging from medium to shallow depths, and a warm subtropical climate. The <em>O.</em> <em>edulis</em> display a slender, small, and comparatively regular morphology, suggesting a preference for stable habitats commonly found in coastal regions with minimal environmental variability. Similarly, the presence of the fossil species indicates littoral environments characterized by nearshore shallow depths, low-energy conditions, normal salinity, and warm subtropical climatic conditions for <em>M.</em> <em>gryphoides</em>. For the Sarıca village area, <em>H.</em> <em>hyotis</em> is linked to reef and peri-reef environments, along with shallow tropical-subtropical marine paleoenvironments at depths of up to 50<!--> <!-->m. Overall, this study presents novel information about the paleoecological distribution of Early Miocene oysters and their first records in the Eğil district.</p></div>","PeriodicalId":50780,"journal":{"name":"Annales de Paleontologie","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annales de Paleontologie","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0753396923000757","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
In the shallow-marine deposits of the Early Miocene (Aquitanian – Burdigalian) Fırat Formation exposed in the Eğil district of Diyarbakır, SE Turkey, three oyster species such as Ostrea edulis (Linnaeus, 1758), Magallana gryphoides (Schlotheim, 1820), and Hyotissa hyotis (Linnaeus, 1758) were recorded for the first time. The specimens collected include four individuals of O.edulis and three individuals of M.gryphoides from the Sağlam village area, and one individual of H.hyotis from the Sarıca village area in Eğil. These specimens were found in the yellow-limestone facies and beige-white marl facies, which represent the thickest and largest sections of the Fırat Formation. For the Sağlam village area, O.edulis suggests a littoral environment with excessive detrital inputs, ranging from medium to shallow depths, and a warm subtropical climate. The O.edulis display a slender, small, and comparatively regular morphology, suggesting a preference for stable habitats commonly found in coastal regions with minimal environmental variability. Similarly, the presence of the fossil species indicates littoral environments characterized by nearshore shallow depths, low-energy conditions, normal salinity, and warm subtropical climatic conditions for M.gryphoides. For the Sarıca village area, H.hyotis is linked to reef and peri-reef environments, along with shallow tropical-subtropical marine paleoenvironments at depths of up to 50 m. Overall, this study presents novel information about the paleoecological distribution of Early Miocene oysters and their first records in the Eğil district.
期刊介绍:
Créées par Marcellin Boule en 1905, les Annales de Paléontologie publient 4 numéros par an traitant des fossiles animaux et végétaux, dans tous les domaines de la paléontologie incluant :
-La Paléoanatomie-
La Paléohistologie-
La Morphologie fonctionnelle-
La Systématique-
L''Évolution-
La Paléoécologie
... et toute les contributions susceptibles d''améliorer la compréhension des organismes et des environnements éteints.