Palaeoworld最新文献_第2页

Biogeographic dynamics of graptolites during the Late Ordovician Mass Extinction in South China 华南晚奥陶世大灭绝期间爬行动物的生物地理动态

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.06.008

Lin-Na Zhang, Sha-Sha Sun, Zong-Yuan Sun, Ming-Feng Lu, Qing Chen

{"title":"Biogeographic dynamics of graptolites during the Late Ordovician Mass Extinction in South China","authors":"Lin-Na Zhang, Sha-Sha Sun, Zong-Yuan Sun, Ming-Feng Lu, Qing Chen","doi":"10.1016/j.palwor.2024.06.008","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.06.008","url":null,"abstract":"Studying the temporal and spatial distributions and dynamics of fossils is crucial for understanding macroevolution processes in geological history. Biodiversity data provide an overview of faunal changes during extinction events, but it cannot differentiate the impact of extinction events on different species. Biogeographic study complements these data by offering more detailed insights into evolutionary patterns. A dataset of 704 graptolite occurrence records for the Late Ordovician Mass Extinction (LOME) was compiled from 60 localities in South China. The geographic distributions of 26 species across four graptolite biochrons (from late Katian to Hirnantian) were quantitatively reconstructed using ArcGIS. Two types of geographic range indexes, including convex hull areas and maximum distribution distances, were calculated for each species in each time slice. Based on the variations in the geographic ranges, the graptolites can be divided into three types. The geographic ranges of the first type shrank before the extinction, that of the second type expanded before the extinction but shrank during the extinction, and that of the third type expanded during the extinction. The first two types include Diplograptina species; and the third of Neograptina species. The study revealed that the extinction event affected all diplograptid graptolite species, as evidenced by the rate of decrease in geographic ranges. Interestingly, the impact of the major extinction appeared to be uniform across all graptolite species, irrespective of their initial geographic range size. The distribution centers of the graptolite species remained relatively stable and predominantly surrounded the center of the sea during the LOME. The substantial reduction in the geographic ranges of diplograptid species might be due to the global factors rather than local sea level decline.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782008","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

Shallow-water whale-fall communities: Evidence from the middle–late Eocene basilosaurid whale bones, Wadi El-Hitan, Fayum, Egypt 浅水鲸落群落：来自埃及法尤姆 Wadi El-Hitan 中新世晚期玄武鲸骨的证据

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.06.006

Esraa S. Ibrahim, Magdy M. El Hedeny, Ahmed M. El-Sabbagh, Gebely A. Abu El-Kheir, Alaa G. Osman, Aldoushy Mahdy, Enas A. Ahmed

{"title":"Shallow-water whale-fall communities: Evidence from the middle–late Eocene basilosaurid whale bones, Wadi El-Hitan, Fayum, Egypt","authors":"Esraa S. Ibrahim, Magdy M. El Hedeny, Ahmed M. El-Sabbagh, Gebely A. Abu El-Kheir, Alaa G. Osman, Aldoushy Mahdy, Enas A. Ahmed","doi":"10.1016/j.palwor.2024.06.006","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.06.006","url":null,"abstract":"The present study examines the basilosaurid whale bone specimens collected from the Sandouk El-Borneta section, Wadi El-Hitan (Valley of Whales), Fayum, Egypt. These specimens are embedded in highly fossiliferous calcareous sandstones of the middle Eocene Gehannam and the upper Eocene Birket Qarun formations. These whale bones display some post-mortem alterations, representing good signs of at least three distinct stages in what is called the whale fall. The co-occurrence of shark, ray, and crocodile fossil specimens with the examined whale bones may indicate the first mobile-scavenger stage. Borings of the siboglinid polychaete genus represent the most common worm type that deeply bioeroded the whale bones, contributing to their rapid degradation, and representing the enrichment-opportunist stage. These fossil traces of the bone-eating worm represent the first record in the Eocene Epoch regionally and inter-regionally, filling the gap between the Late Cretaceous and the Oligocene occurrences. Subsequently, the studied whale bones served as hard substrates for some calcareous tube-dwelling encrusting polychaetes, balanoid barnacles, sheet‐like cheilostome bryozoans, and scleractinian corals. Furthermore, a bioerosion structure produced by polychaete annelids was also observed. The presence of these sclerobionts assemblage confirms the well-developed final reef stage with prolonged exposure and colonisation of these whale bones prior to final burial. Based on the recorded post-mortem alterations, together with other sedimentological and palaeontological data, the studied whale bones were deposited in a shallow open marine bay to sheltered gulf environments, which were characterised by low depositional energy, low to moderate rate of sedimentation, and high surface water productivity.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782016","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 fossil woods from the middle Eocene climate optimum of north-central Turkey 土耳其中北部中始新世最佳气候的新木材化石

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.06.005

Ünal Akkemik, Özlem Toprak, Dimitra Mantzouka

{"title":"New fossil woods from the middle Eocene climate optimum of north-central Turkey","authors":"Ünal Akkemik, Özlem Toprak, Dimitra Mantzouka","doi":"10.1016/j.palwor.2024.06.005","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.06.005","url":null,"abstract":"The middle Eocene climate optimum, a crucial greenhouse event in Earth’s life history, occurred approximately 40 Ma. Fossil wood identifications of middle Eocene age reveal important evidence for the terrestrial tropical/subtropical conditions during this period. The purpose of the present study is to identify new fossil woods from the middle Eocene of north-central Turkey and to evaluate the paleoclimate and paleovegetational history of the north-central Turkey based on new records. Seven fossil woods were collected from the middle Eocene Göynücek Volcanics of the Çekerek Formation (Sarıkaya village, close to Çekerek, Yozgat). Two new species Akkemik and Mantzouka, n. sp., and Akkemik and Mantzouka, n. sp., are described, together with two more coniferous species cf. () and cf. . Although dealing with a rather low number of fossil wood findings, indistinct boundaries of the tree rings, low xeromorphy ratios and high conductivity values in these two new fossil angiosperm species and less visible and indistinct boundaries in the two fossil coniferous species may reflect the warm, humid tropical conditions of the middle Eocene of north-central Turkey. The results are consistent with our former paleoecological evaluation based on the fossil woods including Akkemik and Mantzouka in from the same geological unit and from the same area.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781745","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 data and redescription of Kellnerius jamacaruensis Santana et al., 2013, a Palaemonidae shrimp from the Araripe Basin in northeastern Brazil 来自巴西东北部 Araripe 盆地的虾科虾 Kellnerius jamacaruensis Santana et al.

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.005

Olga Alcântara Barros, Paulo Victor de Oliveira, Antônio Álamo Feitosa Saraiva

引用次数: 0

Actinopterygians from the continental Permian–Triassic boundary section at Babiy Kamen (Kuznetsk Basin, Siberia, Russia) 来自巴比卡门（俄罗斯西伯利亚库兹涅茨克盆地）大陆二叠纪-三叠纪边界剖面的动口纲动物

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.007

Aleksandr S. Bakaev

{"title":"Actinopterygians from the continental Permian–Triassic boundary section at Babiy Kamen (Kuznetsk Basin, Siberia, Russia)","authors":"Aleksandr S. Bakaev","doi":"10.1016/j.palwor.2024.05.007","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.05.007","url":null,"abstract":"The Kuznetsk Basin in Siberia (Russia) is an important area for the study of the continental biota of late Permian to Early Triassic in continuous sections. This study presents a taxonomic description of ray-finned fishes (other fish remains are absent at the section) from the Permian–Triassic boundary section at Babiy Kamen. The new material was collected, bed by bed, during geological and paleontological excavations of coastal-floodplain, shallow-basin deposits of the Tailugan and Maltseva formations. The poorly preserved but diverse ichthyofaunal fossils of the Tailugan Formation consists predominantly of typical Late Paleozoic “palaeoniscoid” fishes (Eurynotoidiidae, Varialepididae, etc.). The earliest known Triassic (Induan) Kedrovo Member of the Maltseva Formation contained a less diverse but well preserved ichthyofaunal fossils including “palaeoniscoid” fishes ( and ). The same species were described earlier from the Induan of the Tunguska Basin. The ichthyofauna of the Early Triassic (Olenekian) Ryaboy Kamen Member of the Maltseva Formation consists of typical Triassic stem-neopterygian (, and ) fishes. The same fishes have been described earlier from the Olenekian of Tunguska Basin. The composition of the ichthyofauna completely changed twice — at the Permian–Triassic and the Induan–Olenekian boundaries.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782015","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

A new species of Pseudotsuga (Pinaceae) from the lower Miocene of Lesvos, Greece, and its palaeogeographical and palaeoclimatic implications 希腊莱斯沃斯下中新世的一个松柏（松科）新种及其古地理和古气候影响

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.06.001

Yan-Bin Zhu, Ya Li, Jian-Ping Zhang, Yong-Dong Wang, Nikolaos Zouros

{"title":"A new species of Pseudotsuga (Pinaceae) from the lower Miocene of Lesvos, Greece, and its palaeogeographical and palaeoclimatic implications","authors":"Yan-Bin Zhu, Ya Li, Jian-Ping Zhang, Yong-Dong Wang, Nikolaos Zouros","doi":"10.1016/j.palwor.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.06.001","url":null,"abstract":"a Carrière is commonly known as Douglas-fir, a minor genus attributed to Pinaceae. Four extant species are included in this genus, with dispersed distribution in East Asia and western North America. possesses a number of fossil records of needled leaves, seed cones, and seeds. Nevertheless, few reliable fossil wood of this genus has been specifically investigated. Here, we describe some anatomically well-preserved petrified fossil wood from the lower Miocene of Lesvos Island, Greece, as n. sp. The studied fossil wood remains are characterized by the presence of normal axial and radial resin canals, piceoid cross-field pitting, along with distinctive helical thickenings in cell walls consistent with . The present fossil conifer further enriches the species diversity of the Miocene Petrified Forest in Lesvos. The first report of from the southern Europe in this study extends the tempo-spatial distribution patterns of and contributes to further understanding of its origin and evolutionary history. The occurrence of . fossil wood, as well as other palaeontological macrofloral composition evidence, indicates a humid warm temperate to subtropical climatic condition during the early Miocene within the Lesvos, which differs significantly from the current Mediterranean climate.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781787","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 Early to Late Cretaceous (Albian–Cenomanian) transition in Putumayo, Colombia: a biostratigraphic and carbon isotope stratigraphic correlation for northwestern South America 哥伦比亚普图马约早白垩世向晚白垩世（阿尔卑斯-塞诺曼）的过渡：南美洲西北部的生物地层和碳同位素地层相关性

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.011

Javier Luque, Jonatan Bustos, Manuel Páez-Reyes, Alejandro Beltrán-Triviño, Angie Rodríguez, Alexandra Delgado, Johan M. Sánchez, Julián Caraballo, Mikel A. López-Horgue

{"title":"The Early to Late Cretaceous (Albian–Cenomanian) transition in Putumayo, Colombia: a biostratigraphic and carbon isotope stratigraphic correlation for northwestern South America","authors":"Javier Luque, Jonatan Bustos, Manuel Páez-Reyes, Alejandro Beltrán-Triviño, Angie Rodríguez, Alexandra Delgado, Johan M. Sánchez, Julián Caraballo, Mikel A. López-Horgue","doi":"10.1016/j.palwor.2024.05.011","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.05.011","url":null,"abstract":"Despite the rich geological and paleontological record of Colombia, the Putumayo region near Ecuador remains one of the least explored regions in the equatorial Neotropics, mainly due to its thick vegetation, deep rock weathering, soil formation, and ground cover, geographic remoteness, and inaccessibility of well-exposed outcrops. This has resulted in limited comparisons with neighboring basins and thus the generation of more comprehensive biostratigraphic correlations with western and northern South America, as well as other paleobiogeographic regions (e.g., Tethys, Western Interior Seaway). Here, we present 67 occurrences of uppermost Lower Cretaceous to lowermost Upper Cretaceous ammonoids and other macrofossils (e.g., bivalves, decapod crustaceans, osteichthyan fish remains, plant remains), as well as a δC chemostratigraphic curve derived from 105 samples from the middle Albian of the uppermost Caballos Formation and the upper Albian to lower Cenomanian lower Villeta Formation, collected from a stratigraphic section exposed along the Mocoa–San Francisco Road, Putumayo, Colombia, here called the San Francisco section. The chemostratigraphic, carbon-isotope curve for the region shows a great similarity with the shape of the accepted curve for the late Albian Oceanic Anoxic Event 1d, which is characterized by a worldwide long positive δC excursion anomaly. The new biostratigraphic and isotopic data serve as a point of reference to compare the Putumayo Basin with neighboring basins (e.g., Marañon Basin in Perú, Oriente Basin in Ecuador, Upper Magdalena Valley Basin in Colombia), and thus the generation of more comprehensive upper Lower Cretaceous and lower Upper Cretaceous biostratigraphic and chemostratigraphic correlations for northwestern South America.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782007","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

Quantitative insights into osteocyte density developmental patterns in fossilized bone — A new method 对化石骨中骨细胞密度发育模式的定量研究--一种新方法

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.010

Denis Horvath, Xu-Ri Wang, Martin Kundrát

{"title":"Quantitative insights into osteocyte density developmental patterns in fossilized bone — A new method","authors":"Denis Horvath, Xu-Ri Wang, Martin Kundrát","doi":"10.1016/j.palwor.2024.05.010","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.05.010","url":null,"abstract":"This study presents a new methodology that combines quantitative image analysis, clustering, and statistical techniques to examine the 2D distribution of osteohistological features in an extinct stem-group bird. The driving force of our research was the need to map ontogenetic changes in the spatial density of osteocyte lacunae in the type specimen of from the Lower Cretaceous of China. We particularly focused on developing tools to reveal quantitative aspects of the dynamics in the formation of avascular bone in this active flier. We achieve this goal by proposing an algorithm with the following methodological steps: 1) We obtain relevant coordinate details for pixel locations selected by thresholding the original image with shading as a criterion. 2) We estimate density using the Gaussian kernel estimator and refined it through observations and regression analysis. 3) After slicing the image, we apply k-means clustering to obtain one-dimensional representations of lacunar density. 4) We proceed by implementing weighted averaging employing the k-nearest neighbor approach. Having applied these steps, we are able to quantitatively disclose growth processes previously unnoticed and reveal dynamics in the formation of lacunar bone tissue in the enantiornithine birds capable of power flight.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782010","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

Storm deposits and trace fossils of Xinji Formation (Cambrian Series 2) in the southern margin of North China Plate 华北板块南缘辛集地层（寒武系2）的风暴沉积和微量化石

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.009

Ming-Yue Dai, Lan-Lan Han, Yong-An Qi, Yao-Gang Du, Zhong-Lei Yin, Song-Hua Chen, Shi-Yun Qing

{"title":"Storm deposits and trace fossils of Xinji Formation (Cambrian Series 2) in the southern margin of North China Plate","authors":"Ming-Yue Dai, Lan-Lan Han, Yong-An Qi, Yao-Gang Du, Zhong-Lei Yin, Song-Hua Chen, Shi-Yun Qing","doi":"10.1016/j.palwor.2024.05.009","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.05.009","url":null,"abstract":"The Xinji Formation (Cambrian Series 2) in the southern margin of the North China Plate developed typical siliciclastic storm deposits and abundant trace fossils. These deposits are characterized by essential indicators, such as erosional surfaces, lag deposits, blocky beddings, hummocky cross stratifications, horizontal or wavy beddings. Storm deposits in the study area are dominated by the development of hummocky cross stratifications, which is categorized into five storm deposit types based on the arrangement of different sedimentary units in the profile. These five types of storm deposits from I to V show the transition from proximal storm deposits to distal storm deposits, the gradual weakening of storm intensity, and the associated growth of quiescent intervals. The trace fossils are mainly developed in the sandstone-mudstone interbeds between storm events and include 14 ichnospecies in 11 ichnogenera: isp., , , , , , isp., , , , isp., isp., , . By analyzing the ichnological index (burrow size, BPBI, ichnodiversity and ichnodisparity) from different storm deposits, it can be seen that from storm deposit type I to storm deposit type V, the ichnological index shows an increasing trend. Combined with the relationship between storm deposits and trace fossils, it is inferred that differences in storm intensity result in different colonization windows, and thus variations in ichnological index of preserved trace fossils. Based on the characteristics of storm deposits and distribution of trace fossils, the preservation forms of trace fossils under storm influence are explored.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782014","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 record of Brachyoxylon wood from the Lower Cretaceous of Qingyuan, southeastern China and its palaeoclimatic implications 中国东南部清远下白垩统 Brachyoxylon 木的新记录及其古气候影响

IF 1.7 3区地球科学

Palaeoworld Pub Date : 2024-07-17 DOI: 10.1016/j.palwor.2024.05.004

Jian-Guo Hui, Su-Xin Yin, Xiao-Liang Cai, Chong Dong, Yuan-Dong Liu, Ning Tian, Gong-Le Shi

{"title":"New record of Brachyoxylon wood from the Lower Cretaceous of Qingyuan, southeastern China and its palaeoclimatic implications","authors":"Jian-Guo Hui, Su-Xin Yin, Xiao-Liang Cai, Chong Dong, Yuan-Dong Liu, Ning Tian, Gong-Le Shi","doi":"10.1016/j.palwor.2024.05.004","DOIUrl":"https://doi.org/10.1016/j.palwor.2024.05.004","url":null,"abstract":"Early Cretaceous was a key period for the evolution of terrestrial ecosystems. In southeastern China, the late Early Cretaceous (Aptian–Albian) floras are relatively well known and characterized by diverse Cheirolepidiaceae, but the early Early Cretaceous floras in southeastern China are poorly known mainly because of the lack of plant fossils. Here we report petrified woods from a new early Early Cretaceous locality in Qingyuan, southern Zhejiang Province, southeastern China. The new fossil woods collected from the Xishantou Formation (earliest Berriasian, earliest Early Cretaceous) are assigned to Tian, Zhu, and Wang based on the anatomy of the secondary xylem. The new material of from Qingyuan lacks distinct growth rings or resin canals and has mixed type pitting on the radial walls of the tracheids, araucarioid cross-field pitting, and uniseriate rays. It is the earliest record of in southeastern China. has been regarded as the wood of the extinct conifer family Cheirolepidiceae and grew in arid to semi-arid environments. Evidence also suggests Cheirolepidiaceae played an important role in the vegetation of southeastern China throughout the Early Cretaceous.","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781739","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