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Coniferous woods from the Albian (Piedra Clavada Formation) of Argentine Patagonia 阿根廷巴塔哥尼亚的Albian （Piedra Clavada组）的针叶林

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-11-19 DOI: 10.1016/j.palwor.2024.11.004

Cosme F. Rombola , Roberto R. Pujana , Daniela P. Ruiz , Inés Aramendía

{"title":"Coniferous woods from the Albian (Piedra Clavada Formation) of Argentine Patagonia","authors":"Cosme F. Rombola , Roberto R. Pujana , Daniela P. Ruiz , Inés Aramendía","doi":"10.1016/j.palwor.2024.11.004","DOIUrl":"10.1016/j.palwor.2024.11.004","url":null,"abstract":"<div><div>Five samples of silicified fossil woods were collected from the Lower Cretaceous Piedra Clavada Formation, Santa Cruz Province, Argentina. The preservation of the fossil woods varies. Two very poorly preserved specimens are classified as “indeterminate conifers”. Based on the wood anatomy of the remaining specimens, we identified two taxa: <em>Brachyoxylon patagonicum</em> (one specimen), possibly related to the extinct conifer family Hirmeriellaceae, and cf. <em>Brachyoxylon</em>/<em>Agathoxylon</em> (two specimens), possibly related to the Hirmeriellaceae or the Araucariaceae. All samples have distinct growth ring boundaries, indicating annual seasonality. Furthermore, the curvature of the rings and the minimum estimated diameter suggest that the woods came from mature trees. Decay patterns resembling those induced by contemporary xylophagous fungi were identified in one specimen. The presence of fossil woods possibly related to the Hirmeriellaceae and Araucariaceae in the Piedra Clavada Formation is consistent with previous palynological studies of this stratigraphic unit. These records support the dominance of conifers in the Early Cretaceous forests of Argentine Patagonia.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 100896"},"PeriodicalIF":1.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684929","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

First late Silurian (Ludfordian–Pridoli?) brachiopods from Iran 第一批来自伊朗的晚志留世（卢德福-普里多利？）腕足动物

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-11-17 DOI: 10.1016/j.palwor.2024.11.002

Leonid E. Popov , Mansoureh Ghobadi Pour , Tatyana L. Modzalevskaya , Vachik Hairapetian

{"title":"First late Silurian (Ludfordian–Pridoli?) brachiopods from Iran","authors":"Leonid E. Popov , Mansoureh Ghobadi Pour , Tatyana L. Modzalevskaya , Vachik Hairapetian","doi":"10.1016/j.palwor.2024.11.002","DOIUrl":"10.1016/j.palwor.2024.11.002","url":null,"abstract":"<div><div>Ludlow to Pridoli? rhynchonellate brachiopods, previously unknown in Iran, are described from the upper Dahaneh-Kalut Formation, outcropping in the Derenjal Mountains on the northern margin of the East-Central Iranian platform. The brachiopod faunas comprise eight species assigned to eight genera including <em>Ancillotoechia bicostata</em> n. sp., <em>Isorthis</em> (<em>Ovalella</em>) <em>equimulticostellata</em> n. sp., <em>Protathyris golshanensis</em> n. sp., and <em>Macropleura kuhestanensis</em> n. sp. The Ludfordian age of these taxa is supported by the occurrences of the conodonts <em>Ozarkodina crispa</em> (Walliser) and <em>Ozarkodina</em> sp. cf. <em>O</em>. <em>snajdri</em> (Walliser). Three low richness and high abundance brachiopod communities are recognised, all of which inhabited a shallow-water carbonate shelf within the Benthic Assemblages 2 and 3. Despite the prevalence of cosmopolitan genera, the Iranian Ludfordian–Pridoli? brachiopod faunas show little interaction with geographically closest contemporaneous faunas of the Australian sector of Gondwana and South China plate.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 100894"},"PeriodicalIF":1.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684927","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

High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China 西南上奥陶统高分辨率沉积旋回地层与天文信号

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-11-08 DOI: 10.1016/j.palwor.2024.11.001

Kai Wang , Ming-Song Li , Peng Tang , Jun-Xuan Fan , Ren-Bin Zhan , Jian-Bo Liu

{"title":"High-resolution sedimentary cyclostratigraphy and astronomical signals in the Upper Ordovician of Southwest China","authors":"Kai Wang , Ming-Song Li , Peng Tang , Jun-Xuan Fan , Ren-Bin Zhan , Jian-Bo Liu","doi":"10.1016/j.palwor.2024.11.001","DOIUrl":"10.1016/j.palwor.2024.11.001","url":null,"abstract":"<div><div>During the Late Ordovician, a series of significant biotic and geological events occurred globally and more specifically in South China. The development of a high-resolution orbital cyclostratigraphic framework and a precise radioisotope dating has greatly enhanced our understanding of the factors controlling these events. In this study, quantitative proxies for palaeo-water depths, derived from sedimentological analyses, serve as indicators for orbital cyclostratigraphic assessment.</div><div>Relatively shallow-marine carbonates with well-developed shallowing-upward cycles were deposited in the western Yangtze Platform during the Late Ordovician. High-resolution geochronological data were obtained from high-precision isotope dilution thermal ionization mass spectrometry (ID-TIMS) zircon dating of K-bentonite beds at the studied section. This facilitated sedimentary facies and environmental analyses, as well as the recognition of sedimentary cycles. Based on mud content, bioclastic content, and laminations, four sedimentary facies, twelve sedimentary microfacies, and forty-eight shallowing-upward sedimentary cycles were identified in the Daduhe Formation.</div><div>Through comparative time series analysis of depth rank, lime mudstone-calcareous mudstone binary data, non-carbonate content, and anhysteretic remanent magnetization (ARM), astronomical cycles and trends in sedimentation rates have been identified. This study confirms the reliability of radioisotope dating, establishing a 0.46 Myr duration for the <em>Dicellograptus complexus</em> graptolite biozone and a 0.96 Myr duration for the <em>Paraorthograptus pacificus</em> graptolite biozone, both with an empirical uncertainty of 0.1 Myr. This research proposes a reliable method for identifying astronomical cycles through high-precision sedimentary microfacies and cyclostratigraphy, in comparison with rock magnetic cyclostratigraphy studies.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100893"},"PeriodicalIF":1.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135702","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

Cynometroxylon aegyptiacum n. sp. (Fabaceae-Detarioideae) from the Miocene of Egypt with palaeoclimatic and biogeographic insights 埃及中新世的古气候和生物地理学研究

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-11-06 DOI: 10.1016/j.palwor.2024.10.007

Zainab M. El-Noamani, Nermeen A. Ziada

{"title":"Cynometroxylon aegyptiacum n. sp. (Fabaceae-Detarioideae) from the Miocene of Egypt with palaeoclimatic and biogeographic insights","authors":"Zainab M. El-Noamani, Nermeen A. Ziada","doi":"10.1016/j.palwor.2024.10.007","DOIUrl":"10.1016/j.palwor.2024.10.007","url":null,"abstract":"<div><div>A new morphospecies of <em>Cynometroxylon</em> is described from the early Miocene deposits of the Gebel El-Khashab Formation exposed along the Cairo-Bahariya desert road in the north Western Desert of Egypt. It is compared with the 13 currently recognized fossil wood species of <em>Cynometroxylon</em>/<em>Cynometra</em> recorded worldwide. The characteristics of this fossil wood align with those typical of the non-seasonal tropical climate during the Miocene period, indicating its habitat at that time. This habitat is consistent with that of some living species of its analogue <em>Cynometra</em>. Upon reviewing the worldwide biogeography of the genus, its extensive distribution in Africa and Asia was observed. Furthermore, the biogeography of the subfamily Detarioideae was compiled, tracing its evolutionary history back to Africa. This confirms the possibility that family Fabaceae likely originated in Africa during the Late Cretaceous to early Paleogene, with subsequent dispersal into Asia and South America. The present record is indicative of a subtropical to warm tropical climate which prevailed in the Miocene of Egypt.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100892"},"PeriodicalIF":1.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135698","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 microcoprolites Favreina iranensis from the Upper Jurassic Mozduran Formation, Kopeh Dagh basin, Iran 伊朗Kopeh Dagh盆地上侏罗统Mozduran组微粪化石Favreina iranensis

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-29 DOI: 10.1016/j.palwor.2024.10.006

Maryam Motamedalshariati , Diego A. Kietzmann , Farokh Ghaemi

引用次数: 0

Mississippian foraminifera from the Lueyang Formation in Guozhen area, South Qinling Orogen, China 南秦岭国镇地区庐阳组密西西比系有孔虫

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-22 DOI: 10.1016/j.palwor.2024.10.005

Zi-Dong Yu , Yang Shen , Xun-Lian Wang , Zhi-Hua Yang , Xiu-Chun Jing

{"title":"Mississippian foraminifera from the Lueyang Formation in Guozhen area, South Qinling Orogen, China","authors":"Zi-Dong Yu , Yang Shen , Xun-Lian Wang , Zhi-Hua Yang , Xiu-Chun Jing","doi":"10.1016/j.palwor.2024.10.005","DOIUrl":"10.1016/j.palwor.2024.10.005","url":null,"abstract":"<div><div>The Mianlue Suture Belt, located in the southern part of the Qinling Orogenic Belt, is a significant tectonic zone in China that formed by the collision of the South China Block with the North China Block during Triassic. The Lueyang Formation, distributed along the southern margin of the Mianlue Suture Belt, is one of the major components of the Late Paleozoic marine strata of the Mianlue Belt. Unfortunately, only a few published paleontological studies are available. This hinders the understanding of the age and sequence of this formation and the evolution of the Mianlue Ocean. Herein, we report, for the first time, at least 51 species and 25 genera of foraminifera from the Lueyang Formation at the Zhuyuanba section. The Zhuyuanba foraminiferal fauna is dominated by <em>Eostaffella</em>, <em>Archaediscus</em>, <em>Paraarchaediscus</em>, <em>Omphalotis</em>, <em>Bradyina</em>, <em>Janischewskina</em>, <em>Endothyra</em> and <em>Mediocris</em>, and possesses some stratigraphically important taxa such as <em>Bradyina cribrostomata</em>, <em>Janischewskina</em> spp. and <em>Paraarchaediscus stilus</em>. Two foraminiferal zones are recognized in the Lueyang Formation, ascendingly the Visean <em>Paraarchaediscus stilus</em> Zone and Serpukhovian <em>Bradyina cribrostomata</em> Zone. So, the age of the Lueyang Formation at the Zhuyuanba section is considered from Visean to Serpukhovian. This paper confirms for the first time that the Lueyang Formation contains the Visean and Serpukhovian strata, providing new paleontological evidence for understanding the evolution of the Mianlue Ocean during the Late Paleozoic.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100890"},"PeriodicalIF":1.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095989","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 tibiotarsus of a giant darter from the upper Miocene of Amazonia and weight estimates for fossil darters 来自亚马逊河中新世上部的一种巨型鲷鱼的胫跗和鲷鱼化石的重量估计

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-18 DOI: 10.1016/j.palwor.2024.10.003

Edson Guilherme , Ighor D. Mendes , Carlos D’Apolito , Lucy G. Souza , Francisco R. Negri , Kathellen G. Magalhães , Jonas P. Souza-Filho

{"title":"The tibiotarsus of a giant darter from the upper Miocene of Amazonia and weight estimates for fossil darters","authors":"Edson Guilherme , Ighor D. Mendes , Carlos D’Apolito , Lucy G. Souza , Francisco R. Negri , Kathellen G. Magalhães , Jonas P. Souza-Filho","doi":"10.1016/j.palwor.2024.10.003","DOIUrl":"10.1016/j.palwor.2024.10.003","url":null,"abstract":"<div><div>Fossil darters are known from every continent since the Oligocene. However, it was in the Miocene of South America that this group reached its maximum diversity. <em>Macranhinga ranzii</em> is the largest darter from the Solimões Formation, described based on the left and right femora as well as the distal end of a tarsometarsus and four vertebrae. Here, we describe for the first time the left tibiotarsus of this species by comparing it with the tibiotarsus of the extant <em>Anhinga anhinga</em> and other fossil anhingids. We also calculated and compared the body mass of <em>Ma</em>. <em>ranzii</em> to that of all known tibiotarsi fossil anhingids using two calculation methods. The tibiotarsus described here is morphologically similar to that of other anhingids, however, in addition to its large size and robustness, it presents diagnostic characters (e.g., torus linearis) that allow us to attribute it to the genus <em>Macranhinga</em> and differentiate it from other fossil species of this genus whose tibiotarsi are known. The estimated body mass of <em>Ma</em>. <em>ranzii</em> ranges from 14.39 to 19.1 kg, ranking it the highest estimated body mass among the darters where the tibiotarsi were found.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100887"},"PeriodicalIF":1.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135696","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

Dimorphism in family Editiidae Knüpfer, 1967 (Ostracoda) 编辑科kn_pfer的二态性，1967（介形虫目）

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-18 DOI: 10.1016/j.palwor.2024.09.009

Dmitry B. Sobolev

{"title":"Dimorphism in family Editiidae Knüpfer, 1967 (Ostracoda)","authors":"Dmitry B. Sobolev","doi":"10.1016/j.palwor.2024.09.009","DOIUrl":"10.1016/j.palwor.2024.09.009","url":null,"abstract":"<div><div>This paper reports the peculiarities of dimorphism based on some early representatives of the family Editiidae <span><span>Knüpfer, 1967</span></span>. A new genus <em>Blumeditia</em> n. gen., four new species (<em>Blumeditia eleganta</em> n.gen. n. sp., <em>Blumeditia pretzella</em> n. gen. n. sp., <em>Blumeditia auctus</em> n. gen. n. sp., <em>Adeditia tkachovae</em> n. sp.), one new subspecies (<em>Proeditia auriculata dimorpha</em> n. subsp.) and six taxa in open nomenclature (<em>Proeditia</em> aff. <em>cristata</em> <span><span>Bushmina, 1979</span></span>, <em>Proeditia auriculata</em> subsp. 1, <em>Proeditia auriculata</em> subsp. 2, <em>Proeditia</em>? sp. 2, <em>Proeditia</em>? sp. 3, and <em>Blumeditia</em> aff. <em>furcata</em> (<span><span>Sobolev, 1998</span></span>)) are systematically described from deposits of the Famennian–Tournaisian shelf of northeastern Laurussia (North and Subpolar Urals, southern part of the Chernyshev Ridge, Russia). The diagnoses of the genera <em>Adeditia</em> <span><span>Gramm and Egorov, 1986</span></span> and <em>Proeditia</em> <span><span>Bushmina, 1979</span></span> are revised. The stratigraphic ranges of the genera <em>Proeditia</em> <span><span>Bushmina, 1979</span></span>, <em>Blumeditia</em> n. gen., and <em>Adeditia</em> <span><span>Gramm and Egorov, 1986</span></span> (20 taxa) are shown. Possible phylogenetic relationships of the studied taxa are presented. The three taxa belonging to the closely related genera <em>Adeditia</em> <span><span>Gramm and Egorov, 1986</span></span>, <em>Blumeditia</em> n. gen., and <em>Proeditia</em> <span><span>Bushmina, 1979</span></span> show dimorphic differences of the extradomiciliar supratype that have not previously been documented in members of the family Editiidae <span><span>Knüpfer, 1967</span></span>.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100889"},"PeriodicalIF":1.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143273218","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

Fossilized soft tissues in tentaculitids from the Upper Devonian of Armenia: Towards solving the mystery of their phylogenetic affinities 来自亚美尼亚上泥盆世的触手类动物的软组织化石：解决它们系统发育亲缘关系的奥秘

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-18 DOI: 10.1016/j.palwor.2024.10.004

Olev Vinn , Tamara Hambardzumyan , Elena Temereva , Arayik Grigoryan , Meline Tsatryan , Lusine Harutyunyan , Karine Asatryan , Vahram Serobyan

{"title":"Fossilized soft tissues in tentaculitids from the Upper Devonian of Armenia: Towards solving the mystery of their phylogenetic affinities","authors":"Olev Vinn , Tamara Hambardzumyan , Elena Temereva , Arayik Grigoryan , Meline Tsatryan , Lusine Harutyunyan , Karine Asatryan , Vahram Serobyan","doi":"10.1016/j.palwor.2024.10.004","DOIUrl":"10.1016/j.palwor.2024.10.004","url":null,"abstract":"<div><div>The tentaculitids represent a significant and diverse group of mysterious fossils found in Palaeozoic strata. Their biology and evolutionary relationships remain poorly understood due to limited information about their soft body anatomy. The discovery of fossilized soft tissues in tentaculitids from the Upper Devonian of Armenia helps to resolve the long-standing mystery of tentaculitid phylogenetic affinities. The thick bundles of phosphatic bars in the tentaculitid interior closely resemble the musculature of several tubicolous invertebrates, such as phoronids and bryozoans. Based on this similarity, we interpret these structures as fossilized muscles of the tentaculitid animal. The attachment of tentaculitid body muscles in a honeycomb pattern to the body wall is unlike that of any mollusc. Based on this muscle arrangement, molluscan affinities of tentaculitoids can be refuted. The muscle arrangement in tentaculitids is more akin to that of bryozoans than to phoronids. Presumably, tentaculitids and bryozoans shared a common ancestor. This ancestor was probably a solitary animal, with coloniality emerging later in the bryozoan branch of the phylogenetic tree. Alternatively, tentaculitoids might have evolved from a bryozoan-like ancestor by losing their coloniality.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100888"},"PeriodicalIF":1.7,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095993","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 Eocene Metasequoia and Taxodium (Cupressaceae) from Lingbao, Henan Province and their implication for a perhumid climate in central China 河南灵宝早始新世水杉和杉木及其对中国中部过湿润气候的指示意义

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-10-16 DOI: 10.1016/j.palwor.2024.10.001

Ping Liu , Hui Jia , Li Xu , Yu Li , Ming-Yue Luo , Tian-Qi Dong , Jiao Huang , Cheng Quan

{"title":"Early Eocene Metasequoia and Taxodium (Cupressaceae) from Lingbao, Henan Province and their implication for a perhumid climate in central China","authors":"Ping Liu , Hui Jia , Li Xu , Yu Li , Ming-Yue Luo , Tian-Qi Dong , Jiao Huang , Cheng Quan","doi":"10.1016/j.palwor.2024.10.001","DOIUrl":"10.1016/j.palwor.2024.10.001","url":null,"abstract":"<div><div>In this study, fossil leaves of <em>Metasequoia</em> Hu and Cheng, along with leaves and cones of <em>Taxodium</em> Richard, from the lower Eocene of the Xiangcheng Group in Lingbao, Henan Province, central China, were examined. These fossils have been taxonomically assigned to <em>Metasequoia</em> sp. (cf. <em>M</em>. <em>glyptostroboides</em> Hu and Cheng) and <em>Taxodium dubium</em> (Sternberg) Heer. The closest modern relatives are <em>Metasequoia glyptostroboides</em> and <em>Taxodium distichum</em> (Linnaeus) Richard, which typically thrive in humid environments, indicating that similar conditions may have prevailed in early Eocene. Through the Species Distribution Model (SDM) experiment, it was suggested that <em>T</em>. <em>distichum</em> is significantly influenced by precipitation levels, highlighting the importance of moisture in their historical distribution. Moreover, the analysis of the survival environments of native <em>Metasequoia</em> and <em>Taxodium</em> indicates that the annual precipitation in Lingbao during the early Eocene exceeded 1000 mm, which is roughly double the current annual precipitation in the area. This precipitation level is comparable to the present-day subtropical climate zone. During the late Eocene and early Oligocene, the seasonal variation in precipitation was intensified due to the strengthening of the East Asian monsoon, which constrained the seed germination and seedling survival. This may have contributed to the decline in the populations of <em>Metasequoia</em> and <em>Taxodium</em> in East Asia during that period.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 3","pages":"Article 100885"},"PeriodicalIF":1.7,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135697","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