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Climate and vegetation changes in southern Primorye (Russian Far East) since the Last Glacial Maximum: A quantitative analysis 末次冰川极盛时期以来滨海南部(俄罗斯远东地区)的气候和植被变化:定量分析
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2025-02-01 DOI: 10.1016/j.palwor.2024.06.009
Tatiana A. Evstigneeva , Olesia V. Bondarenko , Torsten Utescher
{"title":"Climate and vegetation changes in southern Primorye (Russian Far East) since the Last Glacial Maximum: A quantitative analysis","authors":"Tatiana A. Evstigneeva ,&nbsp;Olesia V. Bondarenko ,&nbsp;Torsten Utescher","doi":"10.1016/j.palwor.2024.06.009","DOIUrl":"10.1016/j.palwor.2024.06.009","url":null,"abstract":"<div><div>The climate and vegetation for southern Primorye during the last 21 kyr are studied for the first time in detail using quantitative techniques on high-temporal resolution pollen record. The data obtained showed a clear relationship with global climate events: Last Glacial Maximum, Heinrich 1, Bølling/Allerød, Younger Dryas and the warmest climate event around ca. 8.0 ka. A moderate monsoon-type climate persisted in Primorye during the last 21 kyr. The mean annual temperature did not fall below 0°C. The magnitude of the glacial–interglacial mean temperature difference in southern Primorye was ca. 7°C. Cold and cool temperate climate existed between ca. 21.0 and 11.6 ka and after 4.3 ka respectively. Climate variables of the Last Glacial Maximum were slightly below present-day values, and drier conditions prevailed compared to the late Holocene. Moderately cool conditions with excessive moisture existed during the cold events of the late Pleistocene, i.e., Younger Dryas and Heinrich 1, and in the late Holocene. Humidification did not occur due to heavy rainfall, but due to less evaporation because of low average annual temperatures during these cold events. During the last 21 kyr, there existed dry and wet seasons in Primorye, as at present, associated with monsoon circulation. The summer monsoon was more intense at ca. 16.6 ka, 14.4 ka, 11.6 ka and from ca. 11.0 to 4.3 ka.</div><div>The southern Primorye during last 21 kyr had a diverse spatial vegetation pattern with conifer and broadleaved deciduous forests of warmer or colder temperate type, dry and humid grasslands, open woodlands and riparian vegetation. Both today and in the past, the heterogeneity of the relief and climate created a diverse vegetation cover. The warmest component, broadleaved summergreen warm temperate trees, had a high proportion from 10.4 to 4.6 ka. Late Pleistocene plant communities, especially during the Last Glacial Maximum, were characterized by a high diversity of dry herbs, which indicates a dry steppe. There are indications of forest-steppe during LGM based on PFT and IPR analyses.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100870"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782013","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
Craniomandibular osteology and the first record of the ocular skeleton in a South American rhynchosaur (Archosauromorpha, Hyperodapedontinae) 颅颌面骨学和南美洲犀龙(古龙科,Hyperodapedontinae)眼部骨骼的首次记录
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2025-02-01 DOI: 10.1016/j.palwor.2024.07.002
Jeung Hee Schiefelbein , Mauricio Silva Garcia , Sérgio Furtado Cabreira , Lúcio Roberto da Silva , Rodrigo Temp Müller
{"title":"Craniomandibular osteology and the first record of the ocular skeleton in a South American rhynchosaur (Archosauromorpha, Hyperodapedontinae)","authors":"Jeung Hee Schiefelbein ,&nbsp;Mauricio Silva Garcia ,&nbsp;Sérgio Furtado Cabreira ,&nbsp;Lúcio Roberto da Silva ,&nbsp;Rodrigo Temp Müller","doi":"10.1016/j.palwor.2024.07.002","DOIUrl":"10.1016/j.palwor.2024.07.002","url":null,"abstract":"<div><div>A new rhynchosaur specimen from the Upper Triassic (Candelária Sequence) of Southern Brazil is presented in this contribution. While these reptiles constitute some of the most sampled fossils from these beds, their taxonomic, phylogenetic, and palaeobiological status remain understudied. Delving into the cranial elements of the new specimen we performed a taxonomic and phylogenetic assessment, assigning it to “<em>Hyperodapedon</em>” <em>sanjuanensis</em>, a form that occurs in Brazil and Argentina. This assignment was based on distinctive craniomandibular features such as the absence of lingual teeth in the dentary, a unique feature among hyperodapedontine rhynchosaurs. Furthermore, our phylogenetic analysis supports this scenario. Our approach emphasizes the broader need for comprehensive anatomical descriptions of South American rhynchosaurs, particularly in Brazil, where some crucial taxa remain undescribed and/or unfigured. This study also reinforces the need for a revision of the clade Hyperodapedontinae and the <em>Hyperodapedon</em> genus. The orbital region of the new specimen reveals delicate scleral ossicles, presenting a unique window into the visual adaptations and habits of these reptiles. This is the first record of the ocular skeleton for a rhynchosaur of South America. Beyond the taxonomic and phylogenetic implications, this study elucidates the role of the ocular skeleton in regards to sensory adaptations in hyperodapedontine rhynchosaurs.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100853"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781743","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
Upper Ordovician conodonts from the Taoqupo section in the southwestern margin of the North China Craton 华北克拉通西南缘陶渠坡剖面上奥陶统锥齿动物
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2025-02-01 DOI: 10.1016/j.palwor.2024.06.004
Shi-Xiao Li , Xiu-Chun Jing , Hong-Rui Zhou , Xun-Lian Wang , Yang Shen , Qiang Fang , Zhen-Tao Wang
{"title":"Upper Ordovician conodonts from the Taoqupo section in the southwestern margin of the North China Craton","authors":"Shi-Xiao Li ,&nbsp;Xiu-Chun Jing ,&nbsp;Hong-Rui Zhou ,&nbsp;Xun-Lian Wang ,&nbsp;Yang Shen ,&nbsp;Qiang Fang ,&nbsp;Zhen-Tao Wang","doi":"10.1016/j.palwor.2024.06.004","DOIUrl":"10.1016/j.palwor.2024.06.004","url":null,"abstract":"<div><div>A diverse but relatively low yielding conodont fauna has been recovered from the Yaoxian and the Taoqupo formations at the Taoqupo section, Tongchuan City, Shaanxi Province, North China. This conodont fauna comprises 20 species belonging to 12 genera, exhibiting a mixture of North China and North American Midcontinent provincial affinities, and with several pandemic species associated. Five stratigraphically important species are documented in detail. Among them, <em>Tasmanognathus shichuanheensis</em> is revised as having a septimembrate apparatus. Five successive conodont biozones of late Sandbian to middle Katian age are recognized, namely the <em>Tasmanognathus shichuanheensis</em> Biozone, the <em>Phragmodus undatus</em> Biozone, the <em>Belodina confluens</em> Biozone, the <em>Yaoxianognathus neimengguensis</em> Biozone, and the <em>Yaoxianognathus yaoxianensis</em> Biozone, in ascending order. Some age-diagnostic and widely distributed conodonts present within the Taoqupo conodont fauna greatly facilitate a precise local, regional and international correlation of the present biozonation with coeval representative successions in North China, Northwestern China, South China, and the North American Midcontinent. Biostratigraphic correlations enable ages at the stage slice-level of the middle Sa2, the middle Sa2 to early Ka1, the middle Ka1, the late Ka1 to earliest Ka2, and the middle Ka2 to be assigned to the aforementioned five conodont biozones respectively.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100857"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781740","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
“Out-of-India” dispersal of the extinct fabaceous genus Podocarpium Braun ex Stizenberger 已灭绝的荚果属植物 Podocarpium Braun ex Stizenberger 的 "印度境外 "扩散
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2025-02-01 DOI: 10.1016/j.palwor.2024.05.006
Ashif Ali , Robert A. Spicer , Raman Patel , Rajendra Singh Rana , Mahasin Ali Khan
{"title":"“Out-of-India” dispersal of the extinct fabaceous genus Podocarpium Braun ex Stizenberger","authors":"Ashif Ali ,&nbsp;Robert A. Spicer ,&nbsp;Raman Patel ,&nbsp;Rajendra Singh Rana ,&nbsp;Mahasin Ali Khan","doi":"10.1016/j.palwor.2024.05.006","DOIUrl":"10.1016/j.palwor.2024.05.006","url":null,"abstract":"<div><div><em>Podocarpium</em> is a well-known extinct single-seeded legume genus having extensive Cenozoic fossil occurrences from East Asia to central Europe. To date, there have been no fossil records of this genus from South Asia, including India. Here, we report and describe for the first time a well-preserved fossil pod from the early Eocene of Rajasthan, western India, assigned to extinct <em>Podocarpium</em> based on detailed morphology. It is characterized by an asymmetrical, oblique valve with a single oblong seed, a distinctly curved stipe, a wingless margin, a prominent vascular strand along the dorsal suture that anastomoses into the apex, a weakly curved ventral suture, fine reticulate veins, a short acuminate apex, and a narrowly acute base. This discovery is the oldest fossil evidence of <em>Podocarpium</em> recorded to date worldwide. Together with previous fossil records, we suggest an “Out-of-India” dispersal hypothesis to explain the biogeography of this extinct legume genus. It might have originated under warm and humid tropical climatic conditions in the early Eocene of India (South Asia), then migrated to China (East Asia), and subsequently spread north and westward to Europe.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100860"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781737","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
Devonian Lingulichnus and in situ lingulids: Taphonomy and paleoenvironments of preservation
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-17 DOI: 10.1016/j.palwor.2024.200906
Rodrigo Scalise Horodyski , Renata Guimarães Netto , Daniel Sedorko
{"title":"Devonian Lingulichnus and in situ lingulids: Taphonomy and paleoenvironments of preservation","authors":"Rodrigo Scalise Horodyski ,&nbsp;Renata Guimarães Netto ,&nbsp;Daniel Sedorko","doi":"10.1016/j.palwor.2024.200906","DOIUrl":"10.1016/j.palwor.2024.200906","url":null,"abstract":"<div><div>Lingulids are significant infaunal elements of Lower to Middle Devonian in the Paraná Basin, Brazil, with <em>Lingulichnus</em> traces sometimes found in association with <em>in situ</em> lingulids specimens (Lingulida, Brachiopoda). These trace fossils are typically confined to offshore and transitional offshore-to-lower shoreface environments. This study investigates the relationship between <em>Lingulichnus</em> and <em>in situ</em> lingulids, explores their depositional and paleobiological implications. Four taphonomic modes were identified: (i) autochthonous — <em>in situ</em>, isolated lingulids normally associated with <em>Lingulichnus verticalis</em> or <em>L</em>. <em>inclinatus</em>; (ii) allochthonous — lingulids with reworking evidence (e.g., disarticulated or fragmented shells); (iii) autochthonous sub-primary position — <em>in situ</em> lingulids associated to <em>Lingulichnus hamatus</em>; (iv) temporary sub-primary position — <em>in situ</em> lingulids, isolated or associated to <em>L</em>. <em>hamatus</em> or <em>L</em>. <em>verticalis</em>. Except for the former, these taphonomic modes present high paleoecological resolution, and therefore, paleobiological implications. The <em>in situ</em> lingulids, with small size (≤ 1 cm), occur associated with <em>Lingulichnus</em>, suggesting fast burial under high sedimentation rates, and are concentrated in initial transgressive systems tracts in the study area. In this way, isolated <em>in situ</em> lingulids or associated with <em>Lingulichnus</em> can be a good indicator of high sedimentation rates, and demonstrate the preferential preservation of small organism unable to escape from the fast burial.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 200906"},"PeriodicalIF":1.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642670","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 second progonocimicid (Hemiptera: Coleorrhyncha) from the Middle Cretaceous Kachin amber of Myanmar
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-12 DOI: 10.1016/j.palwor.2024.200904
Yi-Jun You , Tian Jiang , Xin-Er Guan , Beata Bieszczad , Jacek Szwedo
{"title":"A second progonocimicid (Hemiptera: Coleorrhyncha) from the Middle Cretaceous Kachin amber of Myanmar","authors":"Yi-Jun You ,&nbsp;Tian Jiang ,&nbsp;Xin-Er Guan ,&nbsp;Beata Bieszczad ,&nbsp;Jacek Szwedo","doi":"10.1016/j.palwor.2024.200904","DOIUrl":"10.1016/j.palwor.2024.200904","url":null,"abstract":"<div><div>From the Late Permian to the Late Cretaceous, the ancient family Progonocimicidae of hemipteran suborder Coleorrhyncha was widely distributed across both northern and southern hemispheres. Up until now only one species has been described from Middle Cretaceous Kachin amber. Here we describe a new genus and species <em>Awanis clarus</em> n. gen. n. sp., making it the second report from the Middle Cretaceous Kachin amber and the third record in Cretaceous fossil resins. This increases the taxonomic diversity and morphological disparity of progonocimicids during the Cretaceous.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 200904"},"PeriodicalIF":1.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642672","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
Annual growth bands in the late Carboniferous reef-building colonial rugose coral Ivanovia and their environmental significance
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-12 DOI: 10.1016/j.palwor.2024.200905
Yong-Li Zhang , Wen-Tao Huang , En-Pu Gong , Guan-Ming Lai , Mark A. Wilson , Jun-Jie Wang , Ning-Feng Du , De-Peng Li
{"title":"Annual growth bands in the late Carboniferous reef-building colonial rugose coral Ivanovia and their environmental significance","authors":"Yong-Li Zhang ,&nbsp;Wen-Tao Huang ,&nbsp;En-Pu Gong ,&nbsp;Guan-Ming Lai ,&nbsp;Mark A. Wilson ,&nbsp;Jun-Jie Wang ,&nbsp;Ning-Feng Du ,&nbsp;De-Peng Li","doi":"10.1016/j.palwor.2024.200905","DOIUrl":"10.1016/j.palwor.2024.200905","url":null,"abstract":"<div><div>Annual growth bands featuring with high- and low-density bands of massive reef-building corals are considered to be physiological response to seasonal changes in environment and have been widely used as environmental and climatic proxies. Here, we conduct paleontological and geochemical analysis on the late Carboniferous massive coral (<em>Ivanovia</em>) with distinct density bands from Houchang area, South China. Four <em>Ivanovia</em> species including <em>Ivanovia</em> cf. <em>manchurica</em>, <em>I</em>. <em>podolskiensis</em>, <em>I</em>. <em>guizhouensis</em>, <em>Ivanovia</em> sp. have been found in the study area. Aluminum (Al) content and oxygen isotope (δ<sup>18</sup>O) of the annual growth bands in <em>Ivanovia</em> sp. suggest that high-density bands are probably formed during hot and rainy seasons with high temperature and more terrestrial input. In contrast, low-density bands are generally constructed during cooler periods with optimal environmental conditions, consistent with the modern tropical reef-building coral density bands. Spectral analysis of the Al and δ<sup>18</sup>O series from the <em>Ivanovia</em> sp. reveals significant 2–7 yr cycles close to the cyclicality (2–7 yr) of modern El Niño–Southern Oscillation (ENSO). This study highlights the coral annual growth bands and ENSO-like variability during the late Carboniferous.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 200905"},"PeriodicalIF":1.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642671","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
Larger benthic foraminifera and strontium isotope stratigraphy of the Palaeocene limestones in the Guru area, south Xizang (Tibet): an attempt to build a high-resolution biozonation for the eastern Neo-Tethys
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-12 DOI: 10.1016/j.palwor.2024.200903
Xue-Song Ma , Qing-Hai Zhang , Lin Ding , Qian Zhang
{"title":"Larger benthic foraminifera and strontium isotope stratigraphy of the Palaeocene limestones in the Guru area, south Xizang (Tibet): an attempt to build a high-resolution biozonation for the eastern Neo-Tethys","authors":"Xue-Song Ma ,&nbsp;Qing-Hai Zhang ,&nbsp;Lin Ding ,&nbsp;Qian Zhang","doi":"10.1016/j.palwor.2024.200903","DOIUrl":"10.1016/j.palwor.2024.200903","url":null,"abstract":"<div><div>Larger benthic foraminifera (LBF) are one of the most important microfossil groups for Palaeogene biostratigraphy, particularly for shallow-marine carbonate deposits. During the Palaeocene, LBF thrived throughout the Neo-Tethyan Ocean, especially in the eastern Neo-Tethys. However, previous studies on Palaeocene LBF biostratigraphy in this area are relatively poor. This paper presents a detailed stratigraphic study of LBF and strontium isotope from the Palaeocene limestones at Guru, south Tibet. About 68 species of 29 genera were identified, among which 19 species are reported for the first time from south Tibet. Following an Oppel zone approach and adopting some key index fossils that are widely accepted in the Neo-Tethys, four Shallow Benthic Zones (SBZ) ranging from SBZ 2 to SBZ 5 were recognised. Based on detailed LBF changes in each SBZ, we tentatively divide SBZ 2 (uppermost Danian–upper Selandian), SBZ 3 (upper Selandian–middle Thanetian), and SBZ 5 (upper Thanetian) into 3, 3, and 2 sub-biozones, respectively. The <sup>87</sup>Sr/<sup>86</sup>Sr ratios from 42 bulk carbonate samples were measured to construct an independent age framework for the Palaeocene limestones. Integration of LBF and <sup>87</sup>Sr/<sup>86</sup>Sr data yielded a high-resolution stratigraphy and provided absolute age controls for each SBZ. Ages of SBZ 2, SBZ 3, SBZ 4, and SBZ 5 were estimated to be ∼62–60 Ma, ∼60–57.4 Ma, ∼57.4–57 Ma, and ∼57–56 Ma, respectively. Our newly built Palaeocene LBF biostratigraphy at Guru needs further testing from other areas in the Neo-Tethyan realm, and is open for refinement and correction in the future.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 200903"},"PeriodicalIF":1.7,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684501","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 record of Brachyoxylon wood from Upper Jurassic of Sichuan Basin, Southwest China and its paleoenvironmental significance
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-04 DOI: 10.1016/j.palwor.2024.11.007
Ao-Wei Xie , Yong-Dong Wang , Ning Tian , Zi-Kun Jiang , Xiao-Ping Xie , Shu-Na Xi , Shi-Hui Bai , Dieter Uhl
{"title":"First record of Brachyoxylon wood from Upper Jurassic of Sichuan Basin, Southwest China and its paleoenvironmental significance","authors":"Ao-Wei Xie ,&nbsp;Yong-Dong Wang ,&nbsp;Ning Tian ,&nbsp;Zi-Kun Jiang ,&nbsp;Xiao-Ping Xie ,&nbsp;Shu-Na Xi ,&nbsp;Shi-Hui Bai ,&nbsp;Dieter Uhl","doi":"10.1016/j.palwor.2024.11.007","DOIUrl":"10.1016/j.palwor.2024.11.007","url":null,"abstract":"<div><div>Diverse and abundant foliage fossils are well known and well documented from the Upper Triassic to the Lower and Middle Jurassic of the Sichuan Basin in Southwest China. Yet, the fossil record of Upper Jurassic plants in this region is sparse. Decades ago, hundreds of fossil wood specimens were unearthed from the Upper Jurassic in the central part of the Sichuan Basin, offering important insights into the region’s past terrestrial ecosystems and paleoclimate. Despite their significance, systematic studies of these fossils have been limited. Here, we describe the anatomy of a fossil wood specimen from the Upper Jurassic Penglaizhen Formation in Shehong City, Sichuan Province. The specimen displays key <em>Brachyoxylon</em> features, including mixed radial tracheid pitting in conjunction with araucarioid cross-field pitting. This is the first record of the coniferous wood <em>Brachyoxylon</em> in the central Sichuan Basin. Paleoclimatic evidence from associated leaves, pollen, and sediments, suggests that these trees thrived under generally warm and semi-arid to arid conditions, likely in riparian and lacustrine environments with local water abundance, as indicated by the growth rings with narrow latewood bands.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 100899"},"PeriodicalIF":1.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new fossil record of Adiantum (Pteridaceae) from Oligocene of Qaidam Basin, Northwest China and its palaeoenvironmental implications
IF 1.7 3区 地球科学
Palaeoworld Pub Date : 2024-12-04 DOI: 10.1016/j.palwor.2024.11.006
Hong-Yu Chen , Tao Yang , Ya Li , Dieter Uhl , Lei Han , Jia-Hao Cai , Li Zhang , Yong-Dong Wang , De-Fei Yan
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