Palaeoworld最新文献_第4页

Graptolite biostratigraphy of the Dapingian GSSP and its global correlation 大坪期GSSP笔石生物地层学及其全球对比

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-09-24 DOI: 10.1016/j.palwor.2025.201028

Jörg Maletz , Chuan-Shang Wang , Xiao-Feng Wang

引用次数: 0

Scleractinian corals from the Middle Jurassic Buqu Formation, Qiangtang block and their palaeogeographic implications 羌塘地块中侏罗统布曲组石珊瑚及其古地理意义

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-06-27 DOI: 10.1016/j.palwor.2025.200978

Xiu-Ping Zhu , Kun Liang , Wei-Hua Liao , Jia-Run Yin , Xin Rao , Yi-Chun Zhang

引用次数: 0

First report of Hirnantian (Late Ordovician) palaeostomate bryozoans and associated biota of the northern Arabian Plate in southeastern Türkiye 土耳其东南部阿拉伯板块北部Hirnantian（晚奥陶世）古口苔藓虫及其伴生生物群首次报道

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-09-18 DOI: 10.1016/j.palwor.2025.201026

Andrej Ernst , İzzet Hoşgör , Olev Vinn

{"title":"First report of Hirnantian (Late Ordovician) palaeostomate bryozoans and associated biota of the northern Arabian Plate in southeastern Türkiye","authors":"Andrej Ernst , İzzet Hoşgör , Olev Vinn","doi":"10.1016/j.palwor.2025.201026","DOIUrl":"10.1016/j.palwor.2025.201026","url":null,"abstract":"<div><div>The Halevikdere Formation of southern Türkiye yields an under-explored archive of Late Ordovician marine ecosystems. Our knowledge about Ordovician bryozoans in Türkiye is restricted due to the poor preservation of material. The first report of the Hirnantian high-latitude north Gondwanan bryozoans from southeastern Türkiye (Mardin-Derik area, Halevikdere Formation) is presented here. The Late Ordovician (Sandbian–Hirnantian) predominantly fine-grained succession of Derik is among the most remarkable Early Palaeozoic successions in southeastern Türkiye, but its precise geological age is poorly constrained. New bryozoan-rich sequence of glacio-marine related deposits contains indeterminate crinoids and brachiopods. Here we describe a new fauna of bryozoans from the ice-distal glaciomarine succession of the Halevikdere Formation, corresponding to the northern margin of the Arabian Plate. Three palaeostomate bryozoan species were identified: the esthonioporate Esthonioporata sp. indet., cryptostomes <em>Graptodictya</em> sp., and Ptilodictyina sp. indet. (aff. <em>Proavella proava</em>). In this study, a new trace fossil assemblage comprising several ichnotaxa is also documented from the upper part of the bryozoan-bearing sequence of the Hirnantian Halevikdere Formation. The identified bryozoans are related to the typical Ordovician taxa, but their presence in the assemblage, previously reported only from the Upper Ordovician of the Baltic region, is noticeable. These bryozoans and ichnofossils are typically associated with shallow marine environments, reflecting the conditions that prevailed during the time of their formation.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"35 1","pages":"Article 201026"},"PeriodicalIF":1.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Early Ordovician acritarch and prasinophyte assemblages from eastern Yunnan, South China: Biostratigraphical and palaeobiogeographical implications 滇东早奥陶世树属和树属植物组合：生物地层学和古地理意义

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-07-29 DOI: 10.1016/j.palwor.2025.201000

Kui Yan , Long-Long Shan , Jun Li , Thomas Servais

{"title":"Early Ordovician acritarch and prasinophyte assemblages from eastern Yunnan, South China: Biostratigraphical and palaeobiogeographical implications","authors":"Kui Yan , Long-Long Shan , Jun Li , Thomas Servais","doi":"10.1016/j.palwor.2025.201000","DOIUrl":"10.1016/j.palwor.2025.201000","url":null,"abstract":"<div><div>The investigation of acritarch and prasinophyte assemblages from the Tangchih Formation of Lower Ordovician outcrops from the eastern Yunnan Province reveals the presence of 39 genera and 54 species. The assemblages are dominated by the genera <em>Coryphidium</em>, <em>Dactylofusa</em>, <em>Leiosphaeridia</em>, <em>Lophosphaeridium</em>, <em>Micrhystridium</em>, <em>Polygonium</em>, <em>Rhopaliophora</em>, and the galeate acritarch plexus. The first occurrences of <em>Aryballomorpha</em>, <em>Aureotesta clathrata simplex</em>, <em>Barakella</em>, <em>Coryphidium</em>, <em>C</em>. <em>bohemicum</em>, <em>Dactylofusa velifera</em>, <em>Dasydorus</em>, <em>Peteinosphaeridium</em>, <em>Rhopaliophora</em>, <em>Striatotheca</em> and <em>Vulcanisphaera</em> indicate that the age of the Tangchih Formation corresponds to the latest Tremadocian to Floian. The microflora can be correlated to the <em>messaoudensis-trifidum</em> assemblage of western Europe and coeval assemblages worldwide. In terms of palaeoecology, the composition of the palynomorph assemblage, together with sedimentological and trace fossil evidence, indicates a shallow-water environment in the study area during the late Tremadocian to early Floian. In the context of palaeobiogeography, the palynomorph assemblage contains elements of both the ‘warm water’ <em>Aryballomorpha</em>-<em>Athabascaella</em>-<em>Lua</em> assemblage and the ‘cold water’ diacromorph acritarchs, possibly showing a mixed microflora in South China during the Early Ordovician.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"35 1","pages":"Article 201000"},"PeriodicalIF":1.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The first complete developmental case of ptychopariid trilobite 第一个完整的拟螺旋体三叶虫发育病例

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-10-01 DOI: 10.1016/j.palwor.2025.201031

Tao Dai , Xing-Liang Zhang , Shan-Chi Peng

引用次数: 0

New and revised middle Villafranchian canid material from Dafnero-3 (Greece): Implications to Nyctereutes systematics and zoogeography 希腊Dafnero-3中Villafranchian犬科动物资料的新修订：对Nyctereutes系统学和动物地理学的启示

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-09-04 DOI: 10.1016/j.palwor.2025.201011

Anna Savvidou, Dimitris S. Kostopoulos

引用次数: 0

Middle–late Cambrian acritarchs from the Llanos Basin in Colombia: Implications for biostratigraphy and palaeobiogeography 哥伦比亚Llanos盆地中晚寒武世树栖类：生物地层学和古生物地理学意义

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-09-04 DOI: 10.1016/j.palwor.2025.201009

Claudia V. Rubinstein , María C. Vargas , Felipe de la Parra

{"title":"Middle–late Cambrian acritarchs from the Llanos Basin in Colombia: Implications for biostratigraphy and palaeobiogeography","authors":"Claudia V. Rubinstein , María C. Vargas , Felipe de la Parra","doi":"10.1016/j.palwor.2025.201009","DOIUrl":"10.1016/j.palwor.2025.201009","url":null,"abstract":"<div><div>A palynological investigation of a Cambrian sedimentary succession drilled in well A, located in the Llanos Basin of Colombia, revealed moderately preserved and relatively diverse acritarchs. This analysis allows for the identification of two distinct acritarch assemblages. Based on the presence of key diagnostic species and correlation with established middle–late Cambrian acritarch biozones, the lower acritarch assemblage is dated to the middle Cambrian, corresponding to the Drumian–Guzhangian stages of the Miaolingian Series. The upper acritarch assemblage is dated as late Cambrian, corresponding to the Jiangshanian–Stage 10 of the Furongian Series on the Global Chronostratigraphic Scale. The presence of globally-occurring species such as <em>Eliasum llaniscum</em>, <em>Cristalinium cambriense</em>, <em>Ninadiacrodium dumontii</em>, <em>Timofeevia phosphoritica</em>, <em>Vulcanisphaera mougnoana</em>, and <em>V</em>. <em>africana</em> supports the cosmopolitanism of middle and late Cambrian acritarchs. The identification of middle and upper Cambrian strata in the Llanos Basin’s Palaeozoic sequence helps to establish a more accurate biostratigraphic framework for the Palaeozoic of Colombia.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"35 1","pages":"Article 201009"},"PeriodicalIF":1.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Benthic foraminiferal assemblages from the Middle to Upper Jurassic rocks of the Kachchh Basin, India: Insights into taxonomy and palaeoenvironmental reconstruction 印度Kachchh盆地中至上侏罗统底栖有孔虫组合：分类与古环境重建

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-08-05 DOI: 10.1016/j.palwor.2025.201002

Ainul H. Ansari , Rajan Shukla , Avneet Kumar , Abu Talib

{"title":"Benthic foraminiferal assemblages from the Middle to Upper Jurassic rocks of the Kachchh Basin, India: Insights into taxonomy and palaeoenvironmental reconstruction","authors":"Ainul H. Ansari , Rajan Shukla , Avneet Kumar , Abu Talib","doi":"10.1016/j.palwor.2025.201002","DOIUrl":"10.1016/j.palwor.2025.201002","url":null,"abstract":"<div><div>This study reports the Middle to Late Jurassic (Bajocian–Oxfordian) benthic foraminiferal assemblages from Kachchh, India, and assesses their significance as palaeoenvironmental proxies. Four distinct assemblages are identified to evaluate marine benthic foraminiferal groups along the inner-to-outer shelf gradient. From Bajocian to Oxfordian, four environmental fluctuation events were recognised. These fluctuations were examined in relation to bathymetry, organic matter (food availability), oxic and anoxic conditions, and species diversity. Except for the lower Callovian assemblages, the others exhibit favourable environments, ranging from moderately mesotrophic to eutrophic, middle to outer neritic (100–150 m), well-oxygenated conditions and specific diversities. The fluctuations may be due to the increased food influx (Bajocian–Callovian) and decreased dissolved oxygen in the bottom water (Callovian–Oxfordian). Fluctuations in dissolved oxygen and supply of organic matter were the primary environmental factors influencing the distribution pattern of benthic foraminiferal species in the Kachchh Basin. In shallow marine environments with well-oxygenated bottom waters, food availability and oxygen levels played a more decisive role in shaping assemblage structure than bathymetry. However, water depth exerted a greater influence on species distribution in deeper settings.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"35 1","pages":"Article 201002"},"PeriodicalIF":1.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Pachyportax fossils from the Late Miocene Shuitangba locality, Yunnan, revealing the early Bovini evolution and radiation 云南晚中新世水塘坝地区Pachyportax新化石，揭示了早期牛系演化与辐射

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-07-22 DOI: 10.1016/j.palwor.2025.200996

Ding-Ge Guo , Sayyed Ghyour Abbas , Qi-Gao Jiangzuo , Chun-Xiao Li , Yan-Wu Yang , Jia-Yong Cao , Bin Zou , Shi-Qi Wang , Xue-Ping Ji

{"title":"New Pachyportax fossils from the Late Miocene Shuitangba locality, Yunnan, revealing the early Bovini evolution and radiation","authors":"Ding-Ge Guo , Sayyed Ghyour Abbas , Qi-Gao Jiangzuo , Chun-Xiao Li , Yan-Wu Yang , Jia-Yong Cao , Bin Zou , Shi-Qi Wang , Xue-Ping Ji","doi":"10.1016/j.palwor.2025.200996","DOIUrl":"10.1016/j.palwor.2025.200996","url":null,"abstract":"<div><div>As a small-sized Bovini, <em>Pachyportax</em>, originated in the Late Miocene Siwaliks and subsequently dispersed to neighbouring regions in Southeast Asia and the Arabian Peninsula, and eventually reached Yunnan, China. However, no fossil material of this genus had been discovered in China prior to this study. Here we report a new species <em>Pachyportax zhaotongensis</em> n. sp., from an important fossil ape locality, the Shuitangba site in Zhaotong, Yunnan, China, dated at approximately 6.2 Ma. The new species displays the diagnostic characteristics of <em>Pachyportax</em>, such as a robust horn core that extends laterally and backward, with a slightly convex medial side and a flatter lateral side, featuring anterior and posterior keels; the cheek teeth are hypsodont, with moderately developed ribs, folds and basal pillars. It also shows some differences from the known species: the horn core insertion is distant from the orbit and shows no significant torsion, and the anterior and posterior keels on the horn core are less pronounced. These advanced characteristics indicated that <em>Pachyportax zhaotongensis</em> n. sp. represents a late evolutionary stage of <em>Pachyportax</em>. This is also the first report of <em>Pachyportax</em> in China. In addition, based on a phylogenetic analysis, we clarify the relationship of <em>Selenoportax</em> and <em>Pachyportax</em>, and briefly explore the evolution and geographical distribution of the two genera.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"35 1","pages":"Article 200996"},"PeriodicalIF":1.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145929003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of machine learning in radiolarian taxonomy: A case study on Early Cretaceous Turbocapsula lineage 机器学习在放射虫分类中的应用——以早白垩世Turbocapsula谱系为例

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2026-02-01 Epub Date: 2025-08-26 DOI: 10.1016/j.palwor.2025.201005

Xin-Yi Zhang , Han-Ting Zhong , Xin Li , Hui Chen , Shan Ye , Ming-Cai Hou , Chao Ma

引用次数: 0