Review of Palaeobotany and Palynology最新文献_第4页

Cactaceae fossil pollen grains recovered from 15.6-Ma evaporites in south-central Mexico 墨西哥中南部15.6 ma蒸发岩中发现的仙人掌科化石花粉粒

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105463

Elia Ramírez-Arriaga , Aarón Rodríguez-Reyes , Mercedes B. Prámparo , Azucena Canto , Laura Elena Gómez-Lizárraga , G. Iriliana López-Caballero , Alfonso Valiente-Banuet

Cacti constitute one of the most iconic and highly diversified groups of plants in the Americas, as Mexico, the Andean region, and eastern Brazil are the main centers of diversity. For many years, its divergence time has been the central question and an enigmatic topic since research has always been hindered by the scarcity of fossil records. The present study documents the palynological diversity of tricolpate and pantocolpate pollen grains with Cactaceae affinity during the Middle Miocene in the Tehuacán-Cuicatlán Valley, an important center of cactus diversity in south-central Mexico. Aridity during this period coincides with the Mid-Miocene Climatic Optimum and is supported by evaporitic rocks from the upper part of the Tehuacán Formation (TF). Tricolpate pollen grains similar to Cephalocereus-Mammillaria cactus genus, were less abundant in the TF, and cluster analysis distinguished three groups. Furthermore, principal component analysis (PCA) showed that the polar area index, the distance between the apices of the colpi, and the equatorial diameter were the characteristics that explained the maximum variance among the tricolpate specimens. In addition, three groups were identified among the pantocolpate specimens with affinities to the genus Pereskia-Opuntia. PCA of the pantocolpate pollen grains revealed that pollen diameter, columella diameter and density, columella length, exine thickness, and spinule density explained the maximum variance among these grains. Miocene pollen grains from Cactaceae were shorter than those of modern species, suggesting that adaptations to the arid climate may have triggered polyploidy and an increase in pollen grain size.

仙人掌是美洲最具代表性和高度多样化的植物群之一，因为墨西哥、安第斯地区和巴西东部是多样性的主要中心。多年来，它的分化时间一直是一个中心问题，也是一个谜题，因为化石记录的缺乏一直阻碍着研究。本文研究了墨西哥中南部重要的仙人掌多样性中心Tehuacán-Cuicatlán山谷中中新世具有仙人掌科亲缘关系的三孔和pantocolpate花粉粒的孢粉学多样性。这一时期的干旱与中中新世气候最适宜期一致，并受到Tehuacán组上部蒸发岩的支持。与Cephalocereus-Mammillaria cactus属相似的Tricolpate花粉粒在TF中的丰度较低，聚类分析将其划分为3个类群。此外，主成分分析（PCA）表明，极地面积指数、趾尖间距离和赤道直径是解释三足动物标本间最大方差的特征。此外，还鉴定出3个类群与Pereskia-Opuntia属有亲缘关系。花粉粒的主成分分析表明，花粉直径、小柱直径和密度、小柱长度、外壁厚度和小刺密度是各粒间差异最大的解释因子。中新世仙人掌科的花粉粒比现代仙人掌科的花粉粒短，表明对干旱气候的适应可能引发了多倍体和花粉粒大小的增加。

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引用次数: 0

Taphonomic Completeness: A new metric for assessing fossil leaf preservation using the Spitsbergen Cenozoic fossil flora 埋藏完整性：利用斯匹次卑尔根新生代化石区系评估化石叶片保存的新指标

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105464

Harrison O'Rourke , Eimear Nic Lughadha , Karen L. Bacon

Leaves are the most common type of plant macrofossil found in the plant fossil record; however, comparing leaf preservation quality across plant groups, sites, and time periods is challenging. A new metric was devised that allowed the quality of leaf preservation to be quantitatively measured for leaf fossils preserved from different localities, timepoints and plant life forms, based on a suite of leaf traits. The metric produces a score between 6 (high quality preservation) and 0 (low quality preservation). The leaf traits visible in the Spitsbergen Cenozoic fossil flora were studied to analyse the effect of leaf traits on preservation potential. Non-metric multidimensional scaling indicated that plant life form strongly influenced the leaf traits preserved within the Spitsbergen fossil flora, while stratigraphy had a much weaker effect, indicating that depositional environment and climate influenced preservation less than plant life form. The ‘Taphonomic Completeness’ metric indicated that the gymnosperms and ferns had a significantly higher leaf preservation quality than the woody angiosperms and the herbaceous angiosperms, with the latter group having the lowest quality preservation overall. This result suggests that there may be a bias against the leaves of herbaceous species being preserved in the fossil record, which has implications for interpreting the plant fossil record and how paleo ecosystems functioned. Additionally, the development of this quantitative ‘Taphonomic Completeness’ metric provides a standardised approach that can be widely applied to fossil leaf assemblages from other sites and time periods, allowing robust, large-scale comparisons of preservation quality across fossil floras.

叶子是植物化石记录中最常见的植物大化石类型；然而，比较不同植物类群、地点和时间段的叶片保存质量是具有挑战性的。设计了一种新的度量标准，可以根据一系列叶片特征，对不同地点、时间点和植物生命形式保存的叶片化石的叶片保存质量进行定量测量。该度量产生的分数在6（高质量保存）和0（低质量保存）之间。研究了斯匹次卑尔根新生代植物区系中可见的叶片性状，分析了叶片性状对保存潜力的影响。非度量多维尺度表明，植物生命形式对斯匹次卑尔根化石区系中保存的叶片性状影响较大，而地层的影响较弱，表明沉积环境和气候对保存的影响小于植物生命形式。结果表明，裸子植物和蕨类植物的叶片保存质量显著高于木本被子植物和草本被子植物，草本被子植物的叶片保存质量最低。这一结果表明，化石记录中保存的草本物种的叶子可能存在偏见，这对解释植物化石记录和古生态系统的功能具有重要意义。此外，这种定量的“埋藏完整性”指标的发展提供了一种标准化的方法，可以广泛应用于其他地点和时期的化石叶片组合，允许对化石区系的保存质量进行可靠的大规模比较。

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引用次数: 0

First records of Pinuxylon and Xenoxylon wood from the Cretaceous in Shandong Province, Northeast China 山东白垩纪初见梭梭木和Xenoxylon木的记录

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105465

Ruiying Hao , Zhanchun Zou , Zikun Jiang , Kemin Xu , Ning Tian , Zhenguo Ning , Aowei Xie , Xiao Shi , Yongdong Wang , Guohua Xu , Fuxia Zhang

Early Cretaceous petrified wood demonstrates remarkably high diversity across both northern and southern phytoprovinces in China. In recent years, an increasing number of fossil wood discoveries have been made in Cretaceous deposits throughout China, while current research on Early Cretaceous fossil wood remains primarily focused on the northeastern region. However, Cretaceous fossil wood occurrences remain exceptionally scarce in Shandong Province compared with other regions. This study reports the first discovery of well-preserved fossil wood from the Lower Cretaceous in the Jiaolai Basin, represented by two taxa, i.e., Pinuxylon shandongense sp. nov. and Xenoxylon latiporosum (Cramer) Gothan. Notably, P. shandongense sp. nov. constitutes the earliest fossil record of the genus Pinuxylon reported. Phenetic analysis of anatomical characters indicates that this new species is most closely related phylogenetically to P. pinastroides (Kraus) Stockmans et willière. Furthermore, anatomical examination of Xenoxylon latiporosum combined with growth-ring analysis of Keteleerioxylon shandongense indicates that the Jiaolai Basin experienced a seasonal climate during the Early Cretaceous, characterized by localized humid zones within a predominantly arid regime. These discoveries markedly expand the fossil records of Xenoxylon and Pinuxylon, providing unprecedented clarity regarding floristic assemblages in the ecotone between northern and southern phytoprovinces. They yield critical insights into both Mesozoic wood evolution and the paleobiogeography of Cretaceous fossil woods in East Asia. Furthermore, our reconstruction of Early Cretaceous paleoenvironments in the Jiaolai Basin, based on growth-ring analysis, establishes fundamental evidence for Cretaceous paleoclimatic reconstructions in this region.

早白垩世的石化木材在中国北部和南部的植物省都显示出非常高的多样性。近年来，在中国各地白垩纪沉积物中发现了越来越多的木化石，但目前对早白垩世木化石的研究仍主要集中在东北地区。然而，与其他地区相比，山东省白垩纪木材化石产地仍然异常稀少。本文报道了在胶莱盆地首次发现保存完好的下白垩统木材化石，以Pinuxylon shandongense sp. 11和Xenoxylon latiporosum (Cramer) Gothan两个分类群为代表。值得注意的是，P. shandonggense sp. nov.是目前报道的最早的Pinuxylon属化石记录。解剖性状的表型分析表明，该新种与P. pinastroides (Kraus) Stockmans et will的系统亲缘关系最为密切。此外，结合对山东油桐生长年轮的分析，对油桐的解剖分析表明，早白垩世胶莱盆地经历了一个季节性气候，以干旱为主的局部湿润带为特征。这些发现显著扩展了Xenoxylon和Pinuxylon的化石记录，为南北植物省之间过渡带的植物区系组合提供了前所未有的清晰度。它们提供了对中生代木材演化和东亚白垩纪化石木材的古生物地理学的重要见解。此外，在生长年轮分析的基础上重建了胶莱盆地早白垩世古环境，为该地区重建白垩世古气候奠定了基础。

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引用次数: 0

Monitoring seasonal pollen deposition in an arid environment using Tauber traps: ecological and aerobiological insights from Kashan, central Iran 利用陶伯捕集器监测干旱环境中的季节性花粉沉积：来自伊朗中部卡尚的生态和有氧生物学见解

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-22 DOI: 10.1016/j.revpalbo.2025.105462

Elham Mahlooji , Morteza Djamali , Hossein Akhani , Emmanuel Gandouin , Hossein Batooli , Marzieh Heidarzadeh Arani , Mohammad-Reza Mozdianfard

Monitoring atmospheric pollen deposition with Tauber traps has long supported palaeoecological studies in temperate regions of Europe, but their application in arid regions and their potential in aerobiology remain underexplored. We installed Tauber traps at three sites in Kashan and neighboring towns on the western margin of the central Iranian desert, with weekly and monthly (4-weekly) collections over one year, to assess their efficiency in capturing seasonal airborne pollen. The traps reliably reflected both regional desert-steppe vegetation and urban or peri-urban plantations. Comparison with clinical allergy data shows that Chenopodiaceae (s. str.) and Artemisia, together with Morus alba, Olea europaea, and Cupressus, are the major airborne allergens in Kashan. Our findings stress that the allergenic importance of Chenopodiaceae and Artemisia—dominant in summer and autumn pollen rains—has been underestimated in regional aerobiological surveys and clinical testing, which typically rely on a narrow set of non-native extracts. We propose that Tauber traps, as a simple and inexpensive tool, could complement aerobiological monitoring in remote drylands and inform both ecological and medical studies.

利用陶伯捕集器监测大气花粉沉积长期以来一直支持欧洲温带地区的古生态学研究，但其在干旱地区的应用及其在空气生物学中的潜力仍未得到充分探索。我们在伊朗中部沙漠西部边缘的卡尚和邻近城镇的三个地点安装了陶伯捕集器，在一年的时间里每周和每月（4周）收集一次，以评估它们捕捉季节性空气传播花粉的效率。捕集器可靠地反映了区域荒漠草原植被和城市或城郊人工林。与临床变态反应资料比较发现，喀山地区空气中主要的变态反应原为藜科（s.s str.）和青蒿科，以及桑、油橄榄和柏树。我们的研究结果强调，Chenopodiaceae和蒿属植物在夏季和秋季花粉雨中占主导地位，在区域空气生物学调查和临床试验中被低估了，这些调查和临床试验通常依赖于一组狭窄的非本地提取物。我们建议，陶伯捕集器作为一种简单而廉价的工具，可以补充偏远旱地的空气生物学监测，并为生态和医学研究提供信息。

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引用次数: 0

Deep learning of pollen images under low annotation costs: joint optimization of morphological features and training and prediction strategies 低标注成本下花粉图像的深度学习：形态特征与训练预测策略的联合优化

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-21 DOI: 10.1016/j.revpalbo.2025.105458

Teng Zhang , Limi Mao

Pollen identification is of great importance in the fields of palynology, palaeoecology, botany, medicine and forensic science, but traditional microscopic morphological analysis methods are inefficient and subjective. In this study, we propose an innovative approach based on deep learning to improve the accuracy and efficiency of pollen identification. We constructed a high-quality pollen dataset containing 5521 images of 141 species and a structured attribute table containing 20 standardized morphological features. With an improved ResNet50 architecture, the model utilizes a masking mechanism to combine image features with morphological data, significantly improving classification performance. In addition, we propose a joint training strategy that utilizes both weakly labeled data (unlabeled images + some morphological features) and fully labeled data to alleviate the data scarcity problem. The experimental results show that with the introduction of morphological features, the accuracy of the model significantly improves from 83.00% to at least 89.49% and exhibits stronger generalization ability, effectively reducing overfitting. This study provides a scalable solution for automated pollen identification, addressing key challenges in data utilization and classification accuracy.

花粉鉴定在孢粉学、古生态学、植物学、医学和法医学等领域具有重要意义，但传统的显微形态分析方法效率低、主观性强。在本研究中，我们提出了一种基于深度学习的创新方法来提高花粉鉴定的准确性和效率。我们构建了一个高质量的花粉数据集，包含141个物种的5521张图像和包含20个标准化形态学特征的结构化属性表。该模型采用改进的ResNet50架构，利用掩蔽机制将图像特征与形态学数据相结合，显著提高了分类性能。此外，我们提出了一种利用弱标记数据（未标记图像+一些形态学特征）和完全标记数据的联合训练策略，以缓解数据稀缺性问题。实验结果表明，引入形态特征后，模型的准确率从83.00%显著提高到89.49%以上，具有更强的泛化能力，有效地减少了过拟合。该研究为花粉自动识别提供了一个可扩展的解决方案，解决了数据利用和分类准确性方面的关键挑战。

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引用次数: 0

Palaeotorreya, a new genus of extinct Taxaceae from the Early Cretaceous of Northeast China 东北早白垩世已灭绝的红豆杉科一新属古榧树

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-19 DOI: 10.1016/j.revpalbo.2025.105461

Ting Wang , Chong Dong , Jianguo Hui , Xueqiong Wei , Gongle Shi

Taxaceae (the yew family) are a relict family of conifers, with most species having a highly restricted or fragmentary distribution in the northern hemisphere and New Caledonia. Fossil data indicate that the family had diverged by the earliest Jurassic in southern Sweden, and extant taxaceous genera might had appeared since the Jurassic. In this article, we describe a new genus and species of extinct Taxaceae, Palaeotorreya shenghuii gen. et sp. nov., based on lignified leaves from the Lower Cretaceous Huolinhe Formation in West Ujimqin Banner, eastern Inner Mongolia, Northeast China. The leaves of Palaeotorreya shenghuii are linear to linear-lanceolate and hypostomatic. Epidermal cells of adaxial epidermis and non-stomatal zones of abaxial epidermis are strongly elongated. Two lateral stomatal bands on the abaxial leaf surface are narrow and sunken, each is flanked and concealed by two folding edges bearing dense and prominent papillae. Stomata are longitudinally oriented and arranged in short longitudinal files. Stomata are haplocheilic, stomatal complexes are monocyclic, with a complete and solid stomatal ring surrounding the stomatal pit on the outer cuticle surface. Palaeotorreya shenghuii is most comparable with Torreya within extant conifers, but also bears resemblance in stomatal structure to other genera of extant Taxaceae. The new fossils add to our knowledge of the diversity of the yew family during the Early Cretaceous.

红豆杉科（红豆杉科）是针叶树的一个遗存科，大多数物种在北半球和新喀里多尼亚的分布非常有限或零碎。化石资料表明，该科在瑞典南部最早的侏罗纪时期就已经分化，而现存的红杉属可能在侏罗纪以后就出现了。本文以内蒙古东部乌金沁旗西部下白垩统霍林河组木质素化叶片为研究对象，描述了已灭绝的红豆杉科植物Palaeotorreya shenghuii gen. et sp. nov.一个新属和新种。生辉古香榧叶线状至线状披针形，叶片低气孔。正面表皮的表皮细胞和背面表皮的非气孔区明显伸长。叶背面的两条侧生气孔带狭窄而凹陷，每条气孔带被两条折叠的边缘所包围，边缘上有密集而突出的乳突。气孔纵向定向，排列成短的纵锉状。气孔为单倍体，气孔复合体为单环，在外角质层表面的气孔坑周围有一个完整而坚固的气孔环。生辉古香榧与现存针叶树中香榧最具可比性，但其气孔结构也与现存红豆杉科其他属的香榧相似。这些新化石增加了我们对早白垩纪紫杉科多样性的认识。

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引用次数: 0

New fossil evidence from southwestern China sheds light on the formation of modern distribution of Toddalia (Rutaceae) 中国西南地区新发现的化石证据揭示了龙牙亚（龙牙科）现代分布的形成

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-16 DOI: 10.1016/j.revpalbo.2025.105460

Jiang-Min Chen , Xue-Ping Ji , Chun-Xia Zhang , Yu Ji , Jun Yang , Huan-Chong Wang , Yun-Heng Ji , Yong-Jiang Huang

Toddalia Juss. is a genus in Rutaceae, with a modern geographical range that extends from West and East Africa to South, East and Southeast Asia. The genus has a good fossil record in Europe, where it has become extinct, but is poorly represented in the geological record of Asia, where it flourishes today. This study reports the second fossil record of Toddalia in Asia, based on three-dimensional seed remains recovered from the latest Miocene Baoshan Basin in western Yunnan, southwestern China. The fossil seeds are characterized by their reniform shape, smooth surface, large hilar scar, unique raphe excrescence and layered seed coat. Following morphological and anatomical comparisons with both extant and other fossil species, the fossil seeds were assigned to T. nanlinensis, a species first reported from the Early-Middle Miocene Longchuan Basin in southwestern Yunnan. This new fossil finding suggests that the Baoshan Basin probably had forest vegetation in a warm, humid climate at some time during the latest Miocene. This is in line with previous suggestions based on other fossils, such as hominoids (Lufengpithecus sp.) and other mammals, found from the same sedimentary layer of the basin. Together with the previous record, our fossil discovery mirrors continuous presence of Toddalia in southwestern China since at least the Early-Middle Miocene. This provides insight into how the modern distribution range of the genus formed in this region and even in Asia.

Toddalia汁液。是芸香科的一个属，其现代地理分布范围从西非和东非延伸到南亚、东亚和东南亚。该属在欧洲有很好的化石记录，在那里它已经灭绝了，但在亚洲的地质记录中却很少有代表，在那里它今天很繁荣。本研究报告了在滇西宝山盆地中新世晚期发现的三维种子化石，这是亚洲第二次对幼童龙的化石记录。化石种子具有肾形、表面光滑、门瓣瘢痕大、独特的中缝赘肉和层状种皮等特点。通过与现存和其他化石种的形态和解剖比较，化石种子归属于滇西南龙川盆地早中新世-中中新世首次报道的一种T. nanlinensis。这一新的化石发现表明，在中新世晚期的某个时候，在温暖潮湿的气候下，宝山盆地可能有森林植被。这与先前在盆地同一沉积层中发现的其他化石（如人猿（陆丰猿人）和其他哺乳动物）的建议一致。与之前的记录相结合，我们的化石发现反映了至少从中新世早期到中中新世以来，中国西南部就一直存在着托德利亚。这为了解该属的现代分布范围如何在该地区甚至在亚洲形成提供了见解。

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引用次数: 0

Three new exquisitely preserved haplolepideous mosses from the mid-Cretaceous of Kachin, Myanmar 缅甸克钦邦白垩纪中期三种保存完好的单层藓类植物

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-16 DOI: 10.1016/j.revpalbo.2025.105459

Ya Li , Yong-Dong Wang , Peng-Cheng Wu , Lwin Mar Saing , Chun-Xiang Li , Qiang Wang

Dicranidae (haplolepideous mosses) are the second-largest group of mosses with about 4000 species, and thus the radiation of Dicranidae is considered to be a major event in the evolutionary process of mosses. However, the present fossil record of Dicranidae is rather limited for understanding the early diversification of this successful and speciose lineage. Here, we describe three new exquisitely preserved haplolepideous mosses as Calymperites heinrichsianus, Calymperites marginatus and Calymperites striatus based on 32 whole gametophytes and 10 gametophyte fragments embedded in 16 pieces of Kachin amber from the mid-Cretaceous of northern Myanmar. The three fossil species all exhibit a combination of characters, including lanceolate leaves with a simple costa, clasping leaf bases with large rectangular hyaline cells (cancellinae), and subquadrate to short rectangular, smooth to slightly bulging upper lamina cells. These characters are indicative of Calymperaceae, a monophyletic family that is placed in the core Dicranales. Considering the mid-Cretaceous age and morphological differences to extant species, the present three species of Calymperites probably represent stem group members of Calymperaceae. They, along with previously reported three species of Calymperites (Calymperaceae) and Ditrichites aristatus (Ditrichaceae or Dicranaceae), provide palaeobotanical evidence for the early diversification of Dicranidae in the mid-Cretaceous Kachin amber forest of northern Myanmar. Palaeoecological habitat reconstruction indicates that Calymperites from Kachin amber has obviously ecological niche differentiation.

单枝藓科（Dicranidae）是第二大藓类，约有4000种，因此Dicranidae的辐射被认为是苔藓进化过程中的一个重大事件。然而，目前的化石记录对于了解这种成功的物种谱系的早期多样化是相当有限的。本文基于缅甸北部中白垩世克钦琥珀的16块配子体和32个完整配子体和10个配子体碎片，描述了3种新保存完好的单层藓类，分别为heinrichsianus Calymperites、marginatus Calymperites和striatus Calymperites。这三个化石种都表现出以下特征的组合：披针形叶，有一个简单的边缘；紧扣叶基，有大的矩形透明细胞（cancellinae）；近方形到短矩形，光滑到略鼓的上层细胞。这些特征表明萼花科，一个单系的家庭，被放置在核心的Dicranales。考虑到中白垩世时代和与现存物种的形态差异，这3种萼花可能代表萼花科茎群成员。它们与先前报道的三种Calymperites （Calymperaceae）和dirichites aristatus （dirichaceae或Dicranaceae）一起，为缅甸北部克钦琥珀森林中白垩纪中期Dicranidae的早期多样化提供了古植物学证据。古生态生境重建表明，克钦琥珀的钙辉石具有明显的生态位分化。

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引用次数: 0

Ecological response of organic walled microplankton associations to the final stages of the Late Paleozoic Ice Age (LPIA) in Paraná Basin, southwestern Gondwana 冈瓦纳西南部帕拉纳<e:1>盆地晚古生代冰期末期有机壁面浮游生物群落的生态响应

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-16 DOI: 10.1016/j.revpalbo.2025.105456

Rafael R. Bender , Cristina M. Félix , Paulo A. Souza , Tainara Caroline de Aguiar Medeiros , Daiana R. Boardman , Ana Karina Scomazzon

The stratigraphic distribution of organic walled microphytoplanktonic taxa throughout different climatic phases from the Upper Paleozoic of Paraná Basin is evaluated herein. Newly analyzed palynological samples reveal the presence of the genera Botryococcus, Tasmanites, Leiosphaeridia and Deusilites along the interval encompassed by the Pennsylvanian Crucisaccites monoletus Zone (CmZ) and the Gzhelian-Artinskian Vittatina costabilis Zone (VcZ), corresponding to the upper Itararé Group and the final stages of the Late Paleozoic Ice Age (LPIA). Numeric data and general composition of the palynomorph associations are consistent with a proximal deltaic-marine environment under glacial influence with great influx of continental organic particles. A detailed review of the available literature shows that some organisms such as prasinophytes and certain acritarch groups (genera Deusilites and Navifusa) are more abundant within the glacial and terminal glacial stages of the basin, becoming less prominent in the post-glacial phase and finally disappearing almost completely in the subsequent strata. Contrastingly, most records of algae related to Zygnemaphyceae and Chlorococcales originate from the post-glacial stage, suggesting closer affinity for coastal environments of fresh/brackish waters, whereas the acritarch genera Micrhystridium and Veryhachium proliferate from the base of the Palermo Formation, in units interpreted as epicontinental seas. The available information indicates that the presence of algal elements in palynological successions from this interval is mainly controlled by paleogeography, climate, onshore-offshore trends, salinity and paleoenvironmental conditions. As a consequence, it is inferred that lithostratigraphic units from the Upper Paleozoic of Paraná Basin and other chronocorrelated units across Gondwana are characterized by particular microphytoplanktonic signatures.

本文评价了塔里木盆地上古生界不同气候期有机壁浮游微植物类群的地层分布。新分析的孢粉样品显示，在宾夕法尼亚十字带（CmZ）和Gzhelian-Artinskian Vittatina costabilis带（VcZ）所包围的间隙中，存在Botryococcus， Tasmanites， Leiosphaeridia和Deusilites属，对应于晚古生代冰期（LPIA）的上部itarar群和最后阶段。地貌组合的数值数据和一般组成与冰川影响下的近三角洲-海洋环境相一致，大陆有机颗粒大量涌入。对现有文献的详细回顾表明，在盆地的冰期和末冰期，一些生物如湿生植物和某些关键性类群（Deusilites属和Navifusa属）更为丰富，在冰期后变得不那么突出，最终在随后的地层中几乎完全消失。相比之下，大多数与Zygnemaphyceae和Chlorococcales相关的藻类记录来自冰川后阶段，表明它们与淡水/咸淡水的沿海环境更接近，而微纹藻属和Veryhachium则从巴勒莫组的底部繁殖，其单位被解释为陆表海洋。现有资料表明，该层位孢粉演替中藻类元素的存在主要受古地理、气候、近岸趋势、盐度和古环境条件的控制。据此推断，来自帕拉南盆地上古生界的岩石地层单元和冈瓦纳其他与时间相关的单元具有特定的微浮游植物特征。

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引用次数: 0

New palynological data from the Devonian of southern Poland (Siewierz area, Podleśna quarry) 波兰南部（siwierz地区，Podleśna采石场）泥盆纪孢粉新资料

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-11 DOI: 10.1016/j.revpalbo.2025.105457

Marcelina Kondas, Paweł Filipiak

The sedimentary succession exposed in the Podleśna quarry near Siewierz (southern Poland) yielded the first confirmed occurrence of Devonian palynomorphs from this locality. Based on the composition of the miospore assemblages—the most abundant palynomorph group—the deposits have been assigned to the EX2 to possibly EX3 subzones of the EX Miospore Zone, corresponding to the rhenanus/varcus to latifossatus/semialternans conodont zones (Givetian). Preliminary palynofacies analysis suggests deposition in a proximal shelf setting.

在siwierz（波兰南部）附近的Podleśna采石场中发现的沉积序列首次证实了该地区的泥盆纪岩形。根据最丰富的微孢子组合组成，矿床被划分为EX2至EX3亚带，对应于小孔/静脉状到纬窝状/半互生牙形带（Givetian）。初步的孢粉相分析表明沉积在近陆架环境中。

引用次数: 0