Article
Paleontology
Jcrg Maletz, Xiao-Feng Wang, Chuan-Shang Wang
Summary: A revision of early Tremadocian graptolites of the genus Rhabdinopora revealed that Rhabdinopora proparabola from Xiaoyang-qiao section in North China is the oldest species of the genus. These early Tremadocian species of Rhabdinopora can be distinguished based on the presence or absence and branching pattern of their nemata. The biozones of Rhabdinopora proparabola, Rhabdinopora campanulatum, Rhabdinopora flabelliformis (Anisograptus matanensis Biozone), and Rhabdinopora anglica show global correlation. However, there are no planktic graptolites in a short interval at the base of the Ordovician System.
Article
Geosciences, Multidisciplinary
Ming Li, Lixia Li, Wenhui Wang
Summary: Well-preserved graptolites of the genus Kiaerograptus are reported for the first time in the Nanba section, Yiyang, Hunan Province, South China. Based on these new specimens, the Kiaerograptus biozone is established for the first time in South China, which has significant implications for biostratigraphical correlation.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2023)
Review
Geosciences, Multidisciplinary
Jian-Po Wang, Qi-Jian Li, Stephen Kershaw, Yuan-Yuan Zhang, Shen-Yang Yu, Yue Li
Summary: This study provides an overview of the controls on the distribution of organic reefs during the Early Ordovician Period in the Yangtze Platform in South China. The composition of reefs was mainly driven by water depth, with a transition from microbial-dominated to metazoan-dominated reefs. Different environmental settings and water depths played a role in the formation of different types of biotic structures in different regions.
JOURNAL OF PALAEOGEOGRAPHY-ENGLISH
(2021)
Article
Geosciences, Multidisciplinary
Xiaoqun Yang, Zhong Li, Tailiang Fan, Zhiqian Gao, Shuai Tang
Summary: Guided by conodont biostratigraphy and field observations of unconformities, stable carbon isotopic analysis was conducted on Lower-Middle Ordovician sections in the Tarim Basin. The delta C-13 trend in these sections shows three distinct characteristics corresponding to different stages, reflecting variations in local factors and global signals.
GEOLOGICAL MAGAZINE
(2021)
Article
Geology
Ming Li, Pengju Liu, Liting Deng, Lixia Li
Summary: In this paper, we restudied isolated graptolites from acid residue in the Erdaopuzi section in the Baishan area of Jilin Province, northeast China, and discussed taxonomic problems of the subgenus Clonograptus (Neoclonograptus). Four genera and six species were identified, and two graptolite zones were determined based on the significant evolution of morphological characters, namely Adelograptus Zone and the Psigraptus Zone.
ESTONIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Plant Sciences
Aicha Achab, Joerg Maletz
Summary: This study redefines the age of the Euconochitina symmetrica Zone found at the G locality in Levis and provides revisions on the correlation with the graptolite zones. It reveals that the age of E. symmetrica is different from what was initially suggested and gives a better positioning of the Lower Ordovician Laurentian chitinozoan zones on the Ordovician time scale.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Geology
Yan Liang, Olle Hints, Jaak Nolvak, Peng Tang
Summary: Due to unclear illustrations and descriptions, identifying chitinozoans has become complicated and the description of new species has decreased significantly. Building an open-access database and restudying poorly documented specimens using advanced techniques can help solve the problems in chitinozoan research and facilitate progress in the fields of systematics, evolution, biostratigraphy, paleogeography, and the biological affinity of chitinozoans.
ESTONIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Geography, Physical
Ge Zhu, Qiao Lyu, Minghao Du, Weihui Wang
Summary: This study utilized computational fluid dynamics to construct simplified computer models of 92 Ordovician chitinozoan species and assessed the long-term changes in hydrodynamic properties. The results show that chitinozoans gradually increased their floating ability during evolution, consistent with the idea of increased planktonic diversity during the Great Ordovician Biodiversification Event (GOBE). It was also found that structural innovations in chitinozoans were influenced by hydrodynamics, indicating the importance of hydrodynamic pressure in the evolution of Ordovician microplankton.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geochemistry & Geophysics
Xinze Lu, Cole T. Edwards, Brian Kendall
Summary: This study investigates the role of ocean anoxia/euxinia on the base Stairsian mass extinction event by measuring elemental concentrations and uranium isotope compositions in carbonate samples from three sections in the Great Basin. The results show different uranium isotope trends in the three sections, with the distal sections better preserving global ocean signals. The study suggests that the small mass extinction event was not associated with an expansion of global ocean euxinia.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geosciences, Multidisciplinary
Chloe E. A. Amberg, Stewart G. Molyneux, Jan A. Zalasiewicz, Thijs R. A. Vandenbroucke
Summary: This study examines chitinozoan assemblages from the North and South Wales in order to correlate and determine the age of the Arenig Series. The results suggest that the South Wales succession is correlated with the upper Floian Stage, while the North Wales succession is correlated with the Dapingian and Darriwilian stages.
GEOLOGICAL MAGAZINE
(2023)
Article
Plant Sciences
Yangui Li, Xiaohong Chen, Huazhou Yao, Chuanshang Wang, Xiaofeng Wang, Jorg Maletz, Chunbo Yan, Junaid Khan
Summary: This study proposed an optimized scheme of chitinozoan biozonation across the Aeronian-Telychian boundary in the Middle Yangtze area, recognizing five chitinozoan biozones and discussing differences with other regions. It demonstrated that the E. daozhenensis Biozone is more suitable as the lowest chitinozoan biozone of the Telychian in the Yangtze region, replacing the previous Plectochitina brevicollis Biozone. Additionally, the study showed that the uppermost Shamao Formation is diachronous in the Middle Yangtze region based on chitinozoan stratigraphic correlation.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Paleontology
Yan Liang, Peng Tang, Guang-Xu Wang, Guan-Zhou Yan, Qian Wang
Summary: A systematic study on chitinozoans from a Middle-Upper Ordovician succession in Qiaojia, China, reveals the presence of 34 species of 12 genera. The fossils indicate an early Darriwilian age for the upper Hungshihyen Formation and a younger age for the Huadan Formation. However, further research is needed to resolve conflicts in age assignment.
Article
Geology
Jaak Nolvak, Yan Liang, Olle Hints
Summary: The global Spinachitina fragilis Chitinozoan Biozone is considered the lowermost Silurian zone. Despite its wide geographical occurrence, confusion in taxonomy and distribution of the species exists due to the poor documentation in its type region. Restudied material from the type locality and supplementary sections in the East Baltic region suggests that the S. fragilis Biozone coincides with the late Hirnantian age, leading to a revision of the latest Ordovician chitinozoan biozonal scheme for the region. Globally, the S. fragilis Biozone may span across the Ordovician-Silurian boundary.
ESTONIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Rodrigo T. Muller, Mauricio S. Garcia
Summary: Researchers have discovered the oldest dinosaur morphological fossil in the Middle Triassic sediments of Brazil, narrowing the geographical gap between South America, Africa, and Argentina during the early radiation of dinosaur morphological forms.
Article
Geosciences, Multidisciplinary
Yiying Deng, Junxuan Fan, Shuhan Zhang, Xiang Fang, Zhongyang Chen, Yukun Shi, Haiwen Wang, Xinbing Wang, Jiao Yang, Xudong Hou, Yue Wang, Yuandong Zhang, Qing Chen, Aihua Yang, Ru Fan, Shaochun Dong, Huiqing Xu, Shuzhong Shen
Summary: The study utilized high-resolution chronostratigraphy to reveal two major biological events in the early Paleozoic era: GOBE and LOME. GOBE started in the early Ordovician and ended at the Darriwilian boundary, consisting of two major radiation phases; while the Late Ordovician witnessed two extinction events resulting in a regional species loss of approximately 67%.
EARTH-SCIENCE REVIEWS
(2021)
Article
Plant Sciences
David M. Kroeck, Andres Pardo-Trujillo, Angelo Plata Torres, Millerlandy Romero-Baez, Thomas Servais
Review
Paleontology
Ronald E. Martin, Thomas Servais
Article
Paleontology
Yan Liang, Guang-Xu Wang, Thomas Servais, Rong-Chang Wu, Jaak Nolvak, Olle Hints, Xin Wei, Fang-Yi Gong, Guan-Zhou Yan
Article
Plant Sciences
Navid Navidi-Izad, Hossein Hashemi, Borja Cascales-Minana, Sylvie Regnier, Charles H. Wellman, Thomas Servais
Review
Geosciences, Multidisciplinary
Zhen Shen, Claude Monnet, Borja Cascales-Minana, Yiming Gong, Xianghong Dong, David M. Kroeck, Thomas Servais
EARTH-SCIENCE REVIEWS
(2020)
Article
Geosciences, Multidisciplinary
David A. T. Harper, Borja Cascales-Minana, Thomas Servais
GEOLOGICAL MAGAZINE
(2020)
Article
Geosciences, Multidisciplinary
Shucan Zheng, Qinglai Feng, Nicolas Tribovillard, Thomas Servais, Yan Zhang, Bo Gao
JOURNAL OF EARTH SCIENCE
(2020)
Article
Paleontology
Kui Yan, Thomas Servais, Longlong Shan, Jun Li
NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN
(2020)
Article
Plant Sciences
Navid Navidi-Izad, Hossein Hashemi, Sylvie Regnier, David Kroeck, Kui Yan, Thomas Servais
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2020)
Article
Plant Sciences
Amalia Spina, Simonetta Cirilli, Mansour Ghorbani, Roberto Rettori, Andrea Sorci, Thomas Servais
Summary: A detailed palynological study was conducted on the lower Palaeozoic Mila and Ilbeyk formations in the Zagros Basin of southwestern Iran, establishing three palynozones and providing valuable correlations for age determination of Cambrian successions in southern Iran. The close affinities of the Cambrian assemblages with microfloras from peri-Gondwana and Baltica suggest they were part of the same large bioprovince as indicated by current palaeogeographical maps.
Review
Plant Sciences
Shucan Zheng, Sebastien Clausen, Qinglai Feng, Thomas Servais
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2020)
Article
Paleontology
Houcine B. Benachour, Kaddour Mebarki, Mustapha Bensalah, David M. Kroeck, Navid Navidi-Izad, Sylvie Regnier, Thomas Servais
NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN
(2020)
Article
Plant Sciences
David M. Kroeck, Mathilde Blanchon, Axelle Zacai, Navid Navidi-Izad, Houcine B. Benachour, Claude Monnet, Elena Raevskaya, Zbigniew Szczepanik, Thomas Servais
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2020)
Article
Geology
Yan Liang, Olle Hints, Peng Tang, Chenyang Cai, Daniel Goldman, Jaak Nolvak, Erik Tihelka, Ke Pang, Joseph Bernardo, Wenhui Wang
Article
Plant Sciences
Wenhui Wang, Shijia Gao, Thomas Servais, Birendra P. Singh, Paul Myrow
Summary: The Pin Formation in the northern Indian Himalaya may contain a record of the late Katian warming event, with palynological samples indicating a Late Katian age. The study of acritarchs and chitinozoans from this formation provides insights into Upper Ordovician biostratigraphy in the region, highlighting the need for further detailed studies with more samples to refine the understanding.
Article
Plant Sciences
Gar W. Rothwell, Ruth A. Stockey
Summary: This study utilizes anatomical analysis of fossils from Vancouver Island, Canada, to support the development of a whole plant concept for the Eocene species of Gleichenia and provide data for the first organismal concept of an extinct species of Gleichenia from the Cenozoic fossil record. The findings suggest that the characteristics of the Gleicheniaceae family were present during the Cretaceous and Paleogene periods, with modern species well-established and diversifying.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Kathrin Ganz, Cesar Morales-Molino, Erika Gobet, Dmytro Kiosak, Nadezhda Kotova, Jacqueline van Leeuwen, Sergey Makhortykh, Christoph Schworer, Willy Tinner
Summary: This study presents a palaeoecological reinvestigation from the Kardashynskyi mire in southern Ukraine, reconstructing the vegetation dynamics, fire history, and land use for the past 8300 years. The results show that both climate and human activities have driven the vegetation changes, and the remaining special vegetation types are severely threatened under current conditions.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Willem O. van der Knaap, Bas van Geel, Jacqueline F. N. van Leeuwen, Frans Roescher, Dick Mol
Summary: Pollen analysis of fossilized teeth from a giant deer found in The Netherlands provides insights into the diet, landscape, and climate of the specimen. The study suggests that the giant deer most likely lived during the early Eemian or an early Weichselian interstadial.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Yun Guo, Yu Zhou, Josef Psenicka, Jiri Bek, Jana Votockova Frojdova, Zhuo Feng
Summary: A new species of adpressed leptosporangiate fern, Szea yunnanensis sp. nov., is described from Yunnan Province, Southwest China. The fronds of this new species have unique characteristics such as fertile pinnules with triangular to falcate shape and abaxial sori arranged in one row on each side of the midvein.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Adele C. M. Julier, Glynis J. Humphrey, Caitlin Dixon, Lindsey Gillson
Summary: The relationships between woody vegetation cover and fire, climate, herbivory, and human activities in African savanna ecosystems are complex. Fire suppression policies implemented in a national park in northeast Namibia from 1888 to 2005 did not lead to noticeable decreases in fire or enhanced tree recruitment, suggesting that fire occurrence in savanna ecosystems is more closely linked to climate than management. Fire management should adapt to rainfall variability and integrate customs of early dry season burning.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Milan Libertin, Jiri Kvacek, Jiri Bek
Summary: This paper revises the genus Aberlemnia from the Early Devonian of Scotland based on its type-material A. caledonica and describes a new species, Aberlemnia krizii sp. nov, from the Silurian of Czechia. The study provides detailed diagnoses and highlights the differences between the two species. Aberlemnia is positioned on an evolutionary clade line leading to the Lycophytina.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
