Cretaceous non-marine ostracod faunas of South Korea: Synthesis of taxonomy, biostratigraphy and paleoecology

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research Pub Date : 2024-12-13 DOI:10.1016/j.cretres.2024.106070

Byung-Do Choi , Yaqiong Wang

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引用次数: 0

Abstract

This work presents the first review and comprehensive insights into ostracod faunas of the Cretaceous basins of South Korea. Based on previous literature and new data, a total of 57 species belonging to 13 genera, and nine ostracod assemblages are classified from 15 formations of six basins (Gyeongsang, Yeongdong, Hampyeong, Mokpo Volcanics, Haenam, and Sunchang basins). The ostracods of the Gyeongsang Basin can be divided into four assemblages in ascending order: Cyprideidae (Barremian–early Albian; Sindong Group), Cypridea–Ziziphocypris–Lycopterocypris (late Albian–Cenomanian; lower Hayang Group), Lycopterocypris–Cypria (Turonian–?Campanian; upper Hayang Group), and Mongolocypris (Campanian; Anpo Tuff). And, the ostracods from small basins are divided into five assemblages: Candona (Barremian–Aptian; lower strata of the Yeongdong Basin), Lycopterocypris (Aptian–Albian; Seonyudong Formation of the Yeongdong Basin), Mongolocypris–Cypridea–Candona (Aptian–?Cenomanian; Hampyeong Basin and Mokpo Volcanics), Cypridea–Candona (Campanian; Haenam Basin), and Mongolocypris–Cypridea (Campanian; Sunchang Basin). Most diverse taxa of the basins are the representatives of the superfamily Cypridoidea, especially the species of the genus Cypridea. These occurrences indicate the existence of numerous unstable lakes and temporary waterbodies. The pre-Aptian ostracod diversity is very low but peaked during the early Albian–Cenomanian. The species from the upper Albian-Campanian strata of the Gyeongsang Basin (especially Ziziphocypris and Lycopterocypris species) and the Aptian–?Cenomanian Hampyeong Basin exhibit significant similarities with ostracods from China and Mongolia, indicating active faunal exchanges and migration. The Cenomanian ostracods may represent a transitional fauna during the faunal turnover in East Asia, whereas ostracod diversity in the basins tends to decrease again during the Turonian–Campanian.

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这项研究首次对韩国白垩纪盆地的桡足类动物群进行了综述，并提出了全面的见解。根据以前的文献和新的数据，对六个盆地（庆尚、永东、咸平、木浦火山岩、海南和顺昌盆地）15 个地层中的 13 个属共 57 个物种和 9 个浮游动物群进行了分类。庆尚盆地的桡足类可按从高到低的顺序分为四个类群：Cyprideidae（巴里米亚-早白垩世；新洞组）、Cypridea-Ziziphocypris-Lycopterocypris（晚白垩世-震旦纪；下海阳组）、Lycopterocypris-Cypria（都龙-?钟乳石；上海阳组）和 Mongolocypris（钟乳石；安坡凝灰岩）。此外，来自小盆地的桡足类分为五个集合体：Candona（Barremian-Aptian；灵洞盆地下部地层）、Lycopterocypris（Aptian-Albian；灵洞盆地仙游洞地层）、Mongolocypris-Cypridea-Candona（Aptian-?仙满纪；咸平盆地和木浦火山岩）、Cypridea-Candona（钟乳期；海南盆地）和 Mongolocypris-Cypridea（钟乳期；顺昌盆地）。这些盆地中最多样化的类群是鲤形目超科的代表，尤其是鲤形目属的物种。这些物种的出现表明当时存在大量不稳定湖泊和临时水体。前古生代的桡足类多样性很低，但在早阿尔卑斯-新生代达到顶峰。庆尚盆地上白垩世-震旦纪地层中的物种（尤其是 Ziziphocypris 和 Lycopterocypris 物种）以及始新世-?震旦纪咸平盆地中的物种与中国和蒙古的浮游动物非常相似，表明动物交流和迁移非常活跃。震旦纪的桡足类可能代表了东亚动物群更替过程中的一个过渡动物群，而在都元-震旦纪，盆地中的桡足类多样性又趋于减少。

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

Cretaceous Research 地学-地质学

CiteScore

4.10

自引率

19.00%

发文量

235

审稿时长

12 weeks

期刊介绍： Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings. Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale. Research Areas include: • Regional geology • Stratigraphy and palaeontology • Palaeobiology • Palaeobiogeography • Palaeoceanography • Palaeoclimatology • Evolutionary Palaeoecology • Geochronology • Global events.