Palaeoworld最新文献

{"title":"First hadrosauroid record from Petreşti-Arini (Transylvanian Basin, Romania; Upper Cretaceous) and its implications for the evolution of the Hațeg Island vertebrate faunas","authors":"Aaron J. Ebner ,&nbsp;Zoltán Csiki-Sava ,&nbsp;Tim Treiber ,&nbsp;Radu Totoianu ,&nbsp;Felix J. Augustin","doi":"10.1016/j.palwor.2025.200937","DOIUrl":"10.1016/j.palwor.2025.200937","url":null,"abstract":"<div><div>The uppermost Cretaceous continental deposits of Transylvania (western Romania) represent one of the most iconic sources for fossil vertebrates from the Late Cretaceous European Archipelago. Among the numerous uppermost Cretaceous sites known from the Transylvanian Basin, Petreşti-Arini is one of the most important, due to its geological age and preservation of an unusual transitional near-shore environment. Current knowledge of the local vertebrate assemblage included many of the groups typically present in the Upper Cretaceous of Romania but not the hadrosauroids or titanosaurs. In this report, we describe a right humerus of a hadrosauroid discovered at Petreşti-Arini in the lower part of the Sebeş Formation. The humerus can be confidently assigned to a basal hadrosauroid based on its long and robust deltopectoral crest (45% of the humeral length) that is nevertheless shorter than in derived members of the clade (in which the deltopectoral crest is &gt; 55% of humeral length). The specimen represents the first record of hadrosauroids from Petreşti-Arini, dated to around the latest Campanian, making it not only the stratigraphically oldest record of hadrosauroids in the Transylvanian Basin but also one of their earliest well-constrained occurrences across Haţeg Island overall. The specimen refines previous scenarios and gives a better age constraint on the arrival of hadrosauroids to Haţeg Island, documenting their introduction to this area before the end of the Campanian. Additionally, it might imply some sort of paleoenvironmental control over hadrosauroid distribution on Haţeg Island.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 5","pages":"Article 200937"},"PeriodicalIF":1.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947362","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}

{"title":"A possible biotic precursor, Archaeodunaliella junggarensis n. gen. n. sp., in the Upper Paleozoic Fengcheng Formation from Junggar Basin, Northwest China","authors":"Li-Ye Zhu ,&nbsp;Hua Zhang ,&nbsp;Tian-Ming Shi ,&nbsp;Peng Tang","doi":"10.1016/j.palwor.2025.200936","DOIUrl":"10.1016/j.palwor.2025.200936","url":null,"abstract":"<div><div>Biotic precursors are key factors in evaluating hydrocarbon-source rocks. They are normally hard to determine due to the degradation of organisms, and the classification is more challenging since the incompleteness of fossil preservation. In the present study, spherical fossil microalgae are abundant and well-preserved in chert layers of the Fengcheng Formation (Kasimovian–Asselian) from the Well MY1 in the Mahu Sag, northwestern Junggar Basin, Xinjiang, Northwest China. These spheres are so far known to distribute in the northern part of the Mahu Sag, ranging from deep center to marginal area of the Mahu paleo-lake. They are very abundant and considered to be primary producer around the Well MY1 and nearby in the Mahu paleo-lake during the depositional period of the Fengcheng Formation. These spherical microalgae are likely the biotic precursors in the Fengcheng Formation source rock. Due to the absence of isolated specimens, detailed systematic study cannot be made on these spherical fossil microalgae and their classification is still uncertain. Specimens of these spherical fossil microalgae are extracted for the first time from the Well MY1. They show a great similarity to the palmelloid cells of the modern <em>Dunaliella</em> algae in terms of morphology, ecology, physiology, and biomarker compounds. These spherical fossil microalgae are herein described as a new genus and species, i.e., <em>Archaeodunaliella junggarensis</em> n. gen. n. sp. under the family Dunaliellaceae of the order Chlorophyta, which has an affinity with modern <em>Dunaliella</em>.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 5","pages":"Article 200936"},"PeriodicalIF":1.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947477","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}

{"title":"Corals from the middle Visean (Mississippian) coral biostrome in the Yashui section, Guizhou, South China: Palaeogeographical implication","authors":"Hui Wang ,&nbsp;Le Yao ,&nbsp;Wei Lin ,&nbsp;Qiu-Lai Wang","doi":"10.1016/j.palwor.2025.200934","DOIUrl":"10.1016/j.palwor.2025.200934","url":null,"abstract":"<div><div>Following the Late Devonian mass extinction events, rugose corals underwent a major phase of proliferation during the Visean Age (Middle Mississippian), as demonstrated by the diversification of reef-building colonial corals. The detailed taxonomical composition and palaeogeographical distribution of these reef builders, however, have not yet been explicitly studied. In this study, rugose and tabulate corals are described from the middle Visean coral biostrome in the Yashui section of central Guizhou, South China. Seven species of five genera are recognised, including solitary rugose corals <em>Arachnolasma cylindricum</em>, <em>Heterocaninia guixianense</em>, <em>H</em>. <em>multiseptatum</em>, and <em>Kueichouphyllum sinense</em>, colonial rugose coral <em>Stylostrotion houi</em>, and tabulate corals <em>Syringopora</em> cf. <em>ramulosa</em> and <em>Sy</em>. cf. <em>reticulata</em>. Within this coral fauna, <em>St</em>. <em>houi</em>, <em>Sy</em>. cf. <em>ramulosa</em> and <em>K</em>. <em>sinense</em> are most abundant and distinguished as the main builders of the biostrome. In the middle Visean, the same coral species of the Yashui coral fauna also occurred in other regions in Asia, which are positioned palaeogeographically in the eastern Palaeotethys.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 5","pages":"Article 200934"},"PeriodicalIF":1.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947478","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}

{"title":"The early Holocene vegetation history and quantitative reconstruction of climate in the Chahanur Lake, Inner Mongolia Plateau, China","authors":"Xu-Ran Zhang ,&nbsp;Hua-Yong Zhang ,&nbsp;Zhong-Yu Wang ,&nbsp;Hao Chen ,&nbsp;Xiao-Chang Wu ,&nbsp;Zhao Liu","doi":"10.1016/j.palwor.2025.200933","DOIUrl":"10.1016/j.palwor.2025.200933","url":null,"abstract":"<div><div>Vegetation is sensitive to climate change, and lake sediments store much information about palaeovegetation. Although environmental information has been recorded for most of the world’s lakes, some vegetation and climate history inconsistencies have persisted since the Holocene due to large regional differences. In this study, sediment samples were collected from Chahanur Lake on the Inner Mongolia Plateau, the dating sequence of the samples was determined by Accelerator Mass Spectrometry (AMS) ¹⁴C dating, and the vegetation history was reconstructed using the biome method and the climate was reconstructed using the weighted averaging partial least squares (WAPLS) method. Vegetation and climate history were systematically analysed. The results showed that the profile age of the lake was 11438–7918 cal. yr BP. During the early Holocene, vegetation evolved from sparse forest steppe (11438–10092 cal. yr BP) to broad-leaved forest steppe (10092–9288 cal. yr BP), and finally to the sparse forest steppe (9288–7918 cal. yr BP). Climate changed from cold and dry during 11438–10092 cal. yr BP, to warm and wet between 10092 and 9288 cal. yr BP, then warm and dry from 9288 to 7918 cal. yr BP. The reconstruction of palaeovegetation and palaeoclimate indicates increased precipitation during the early Holocene on the Inner Mongolia Plateau. This supports previous studies on palaeovegetation and enriches the Holocene pollen database.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 5","pages":"Article 200933"},"PeriodicalIF":1.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923705","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}

{"title":"Petrographic, palaeofloral, and taphonomic characteristics of the Permian coal-bearing sequences in Korba Basin, Central India: Implications for their palaeoecology and depositional settings","authors":"Vivek Kumar Mishra ,&nbsp;Vinod Atmaram Mendhe ,&nbsp;Vikram Partap Singh ,&nbsp;Shreya Mishra ,&nbsp;Srikanta Murthy ,&nbsp;Alka D. Kamble ,&nbsp;Sayed W. Abrar","doi":"10.1016/j.palwor.2025.200931","DOIUrl":"10.1016/j.palwor.2025.200931","url":null,"abstract":"<div><div>The coal-bearing deposits associated with the Barakar Formation of the Korba Basin were examined through a multi-disciplinary analysis, including organic petrographic, palynofacies, palynological, and taphonomic techniques. This cohesive approach is decisive for elucidating the genesis and evolution of organic matter, determining age constraints and reconstructing the palaeoecological and depositional environments during peat accumulation. The petrographic studies demonstrate that the vitrinite group of macerals has dominance (average 40.2 vol.%) over the inertinite and liptinite groups in the organic composition. Within the vitrinite group, the telovitrinite subgroup is chiefly comprised of the collotelinite maceral (average 25.7 vol.%), indicating the higher terrestrial influx and the presence of anaerobic environment conditions. While palynofacies analysis reveals dominance of degraded organic matter (average 39.88%). The subsequent degradation of such vegetation, probably caused by bacterial activity (and/or mechanical breakdown), results in substantial amounts of degraded organic matter and vitrodetrinite maceral (average 12.5 vol.%). The studied palynoassemblage is largely dominated by bisaccate pollen represented by <em>Scheuringipollenites</em>, <em>Faunipollenites</em>, <em>Striatopodocarpites</em>, <em>Striasulcites</em>, etc. Based on inter-, intra- and Gondwanan palynological correlation, these palynoassemblages are Artinskian in age. Further, the affinity of palynoassemblage reflects glossopterid-dominated forest along with lower proportions of Coniferales (average 2.3%) and Peltaspermales (average 1.8%) in relatively warm and humid climatic conditions. The appreciable presence of cordaites (average 12.3%), indicated by the monosaccate pollen of <em>Parasaccites</em> and <em>Barakarites</em>, suggests high terrigenous input into the mire. However, the occurrence of the spores of filicopsid and lycopsid indicates a significant contribution from herbaceous vegetation.</div><div>Further, the values of various petrographic indices and their cross-plotting suggest that the precursors of the peat-forming vegetation (mainly telmatic) were deposited in wet forest settings under mesotrophic hydrological conditions with intermittent fluctuation to rheotrophic conditions. Likewise, the palynofacies analysis indicates that organic matter deposition occurred under suboxic conditions in distal settings. The diverse palynofacies elements retrieved indicate that organic matter deposition occurred under suboxic conditions in distal settings. The taphonomic studies reveal the predominance of buoyant saccate taxa (Group E) and the rarity of spores in the recovered palynoassemblage, indicating an allochthonous origin for the organic matter and the influence of depositional environment on the palynocomposition.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 5","pages":"Article 200931"},"PeriodicalIF":1.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929082","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}

{"title":"… and the devil is in the details: A response to Furió et al. (2024)","authors":"Vicente D. Crespo ,&nbsp;Carolina Castillo","doi":"10.1016/j.palwor.2025.200932","DOIUrl":"10.1016/j.palwor.2025.200932","url":null,"abstract":"<div><div>In 2023, we described a new taxon <em>Europotamogale melkarti</em> <span><span>Crespo, Cruzado-Caballero, and Castillo, 2023</span></span>, based on a single dental remain (<span><span>Crespo et al., 2023</span></span>). <span><span>Furió et al. (2024)</span></span> subsequently invalidated this taxon in their response, which contained numerous errors and misinterpretations of the fossil record, the literature, and our original article. Here, we systematically address the principal errors made by Furió et al. in their response.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 4","pages":"Article 200932"},"PeriodicalIF":1.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867926","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}

{"title":"Early Paleogene plant biomes of the Pacific side of Eurasia","authors":"Olesia V. Bondarenko ,&nbsp;Torsten Utescher","doi":"10.1016/j.palwor.2024.06.007","DOIUrl":"10.1016/j.palwor.2024.06.007","url":null,"abstract":"<div><div>Major plant biome changes in East Asia during the early Paleogene are studied using the Integrated Plant Record vegetation analysis for the first time based on paleobotanical records. The paleobotanical record employed for the reconstruction comprises 110 paleofloras covering the early Paleocene to early Eocene, a time-span of ca. 17 Myr. Our data indicate the presence of more forested conditions over East Asia during the early Paleogene than at present. The early Paleogene vegetation cover in the study area fundamentally differed from modern and was much more homogeneous compared to the modern one. Mixed mesophytic zonal vegetation dominated on the Pacific side of Eurasia during the early Paleogene. Thermophilous mixed mesophytic forests were distributed even at very high latitudes, but at the same time, ecotone between the mixed mesophytic / broadleaved evergreen forests and broadleaved evergreen forest were confined to regions south of 50°N. The proportions of sclerophyllous plants are low in general, even in the mid-latitudes. The localities with open woodlands are all located south of ca. 45°N. The observed vegetation patterns and their changes throughout the early Paleogene in many cases can be correlated with climate patterns and the overall continental paleoclimate evolution as reconstructed from the paleobotanical record. The higher-than-present spatial homogeneity of early Paleogene vegetation coincides with shallow temperature gradients and a significantly more humid regional rainfall pattern over East Asia during the early Paleogene.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100865"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782012","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}

{"title":"Palaeoenvironmental implications of a turritelline-dominated assemblage from Upper Cretaceous carbonate rocks of Narmada Basin, India","authors":"Prantik Mondal ,&nbsp;Arunaditya Das ,&nbsp;Biplab Bhattacharya ,&nbsp;Kalyan Halder","doi":"10.1016/j.palwor.2024.06.003","DOIUrl":"10.1016/j.palwor.2024.06.003","url":null,"abstract":"<div><div>Turritelline-dominated assemblages (TDAs) occur in modern siliciclastic seas within shallow depths, under normal to below normal salinity, high nutrient flux, high ocean upwelling current and/or runoff and cool water conditions. Similar assemblages in carbonate sediments are rare in modern oceans. However, TDA in carbonate rocks are common during the Cretaceous. In this study, we report the presence of a TDA in the late Turonian Nodular Limestone Formation of the Bagh Group, Narmada Basin, central India. An unusually small species of <em>Turritella</em>, <em>T</em>. <em>bardhani</em> Halder, n. sp., is described from the TDA. The TDA, in terms of host rock microfacies and taphonomy, indicates shallow water to intertidal, low to moderate energy, eutrophic to mesotrophic conditions, that prevailed in restricted lagoonal to marginal lagoonal, back-reef environments. The turritellines, based on trace elements and Rare Earth Elements concentration, thrived under dysoxic conditions and experienced above-normal marine salinities. The preferences of modern TDAs do not fully represent such past ecological and lithological conditions, indicating an example of a non-uniformitarian shift in habitat.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100855"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781741","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}

{"title":"Taxonomy and evolutionary implications of a new fossil stonefly family (Insecta, Plecoptera) from Middle Cretaceous Kachin amber of northern Myanmar","authors":"Zhi-Teng Chen","doi":"10.1016/j.palwor.2024.06.002","DOIUrl":"10.1016/j.palwor.2024.06.002","url":null,"abstract":"<div><div>Plecoptera, commonly known as stoneflies, represent an ancient order of aquatic insects with significant ecological importance in freshwater ecosystems. This study describes a new genus and species of stonefly, <em>Crossoperla teslenkoae</em> n. gen. n. sp., based on a female adult preserved in Middle Cretaceous Kachin amber. Morphological examination reveals the taxonomic placement of <em>C</em>. <em>teslenkoae</em> within the infraorder Systellognatha of the suborder Arctoperlaria. Distinctive wing venation patterns and genitalic structures differentiate <em>C</em>. <em>teslenkoae</em> from extant and extinct stonefly families. A new extinct fossil family, Crossoperlidae n. fam. is established for the new stonefly. The findings contribute to the understanding of stonefly evolution, palaeodiversity, and ecological adaptations.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100854"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141781742","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}

{"title":"New fossil woods from the middle Eocene climate optimum of north-central Turkey","authors":"Ünal Akkemik ,&nbsp;Özlem Toprak ,&nbsp;Dimitra Mantzouka","doi":"10.1016/j.palwor.2024.06.005","DOIUrl":"10.1016/j.palwor.2024.06.005","url":null,"abstract":"<div><div>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 <em>Apocynoxylon umuttuncii</em> Akkemik and Mantzouka, n. sp., and <em>Ficoxylon anatolicum</em> Akkemik and Mantzouka, n. sp., are described, together with two more coniferous species <em>Pinuxylon</em> cf. <em>P. tarnocziense</em> (<span><span>Tuzśon, 1901</span></span>) <span><span>Greguss, 1954</span></span> and <em>Juniperoxylon</em> cf. <em>J. acarcaea</em> <span><span>Akkemik, 2021a</span></span>. 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 <em>Actinodaphnoxylon zileensis</em> Akkemik and Mantzouka in <span><span>Akkemik et al., 2021</span></span> from the same geological unit and <em>Palmoxylon sabaloides</em> <span><span>Greguss, 1969</span></span> from the same area.</div></div>","PeriodicalId":48708,"journal":{"name":"Palaeoworld","volume":"34 1","pages":"Article 100862"},"PeriodicalIF":1.7,"publicationDate":"2025-02-01","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}