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)
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
Paleontology
Joerg Maletz, Chuanshang Wang, Xiaofeng Wang
Summary: The graptolite succession of the YD-1 drill core in the Yangtze platform of China provides insight into the lower Silurian biostratigraphy of the Yichang region, revealing gaps and the necessity for further modification and revision of the graptolite biostratigraphy. The study highlights the incomplete nature of the Llandovery in the eastern flank of the Huangling anticline and emphasizes the challenges in dating the biostratigraphically younger part of the succession accurately with graptolite faunas.
PAPERS IN PALAEONTOLOGY
(2021)
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
Biology
Annalisa Ferretti, Stig M. Bergstrom
Summary: This study provides a modern taxonomic review of the late Darriwilian-early Sandbian conodont fauna in the Llandeilo area, revealing approximately 20 multielement species including representatives of Amorphognathus, Baltoniodus, Eoplacognathus, and Plectodina. The faunal assemblage shows biogeographic characteristics and links to age equivalent Baltoscandic faunas. Different genera are present compared to coeval Baltoscandic faunas, but similar species indicate a connection.
HISTORICAL BIOLOGY
(2022)
Article
Geography, Physical
Blanca A. Toro, Nexxys C. Herrera Sanchez, Daniel Goldman
Summary: This study uses CONOP9 to construct a range chart and correlation model from graptolite occurrences in different regions. The results reveal 13 graptolite biozones and demonstrate a diversification phase in the early Floian, with peaks in the late early Floian and the beginning of the middle Floian. These findings are generally consistent with previous research in other regions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Plant Sciences
Yan Liang, Jaak Nolvak, Olle Hints
Summary: Chitinozoan investigations in South China during the late Middle to early Late Ordovician are limited. This study presents new data from the Miaopo Formation at the Zhenjin section in the Yichang area, including the identification of 13 genera, 33 species, and the description of three new species. The presence of the Baltoscandian index species, Laufeldochitina striata, is documented for the first time in South China. The results suggest the reassignment of the C. megacalix Subzone to the L. striata Biozone based on concurrent first appearance datum, and the recognition of Armoricochitina granulifera as a useful marker for this time interval in South China.
Article
Geology
Liting Deng, Ming Li, Mo Huang
Summary: A restudy of the early Darriwilian graptolites from the Dameigou section in the Qaidam Basin provides new information for graptolite biostratigraphy. The identification of the Levisograptus dentatus Zone and the Holmograptus lentus Zone from the Qaidam Basin replaces the old Amplexograptus confertus Zone.
ESTONIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Geology
Byung-Do Choi, Baoyan Jia, Min Huh, Jongyun Jung, Yaqiong Wang
Summary: A total of seven species of cypridoidean ostracods were discovered in three sections in the Gyeongsang Basin, South Korea. The presence of one species is a first record in Korea. The taphonomic features indicate the presence of two distinct thanatocoenoses, and the absence of certain species may be attributed to unstable environments and low competitiveness.
CRETACEOUS RESEARCH
(2021)
Article
Paleontology
Thomas W. Wong Hearing, Mark Williams, Adrian Rushton, Jan Zalasiewicz, Toshifumi Komatsu, Christopher Stocker, Thomas H. P. Harvey, Shuji Niko, Hung Dinh Doan, Ha Thai Trinh, Hung Nguyen, Minh Trung Nguyen
Summary: Two new graptolite assemblages have been identified in the Phu Ngu Formation of Bac Kan Province, Vietnam, suggesting a Late Ordovician Katian age and enriching the biostratigraphical information of this formation.
PALEONTOLOGICAL RESEARCH
(2021)
Article
Geography, Physical
David A. T. Harper, Borja Cascales-Minana, David M. Kroeck, Thomas Servais
Summary: Diversification is a key property of life, with research on biodiversity trajectories based on data availability and analytical methods. Regional datasets exploring key fossil groups reveal distinctive biodiversity signals associated with low-latitude settings but also highlight significant gaps in knowledge.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geology
Jowrg Maletz, Per Ahlberg
Summary: The Krapperup drill core from southern Sweden contains one of the most important graptolitic Darriwilian successions of Baltica, providing insight into early evolution of axonophoran graptolites and demonstrating distinct biogeographic faunal differentiation during this time.
Article
Geology
Jorg Maletz, Per Ahlberg
Summary: The Dapingian and lower Darriwilian graptolite succession from the Krapperup drill core in Scania, Sweden, provides a detailed insight into the evolutionary changes of axonophoran graptolites on the Scandinavian platform in the early Paleozoic era. The succession includes faunal elements from the Darriwilian Arienigraptus zhejiangensis Subzone, Levisograptus mui, Levisograptus sinicus, and other axonophoran elements, with new species described. The investigated interval belongs to the upper part of the Toyen Shale Formation and is rich in important graptolite specimens.
Article
Geology
Fernando E. Lopez, Gladys Ortega, Guillermo L. Albanesi, Aldo L. Banchig
Summary: Upper Ordovician graptolites and conodonts from the Yerba Loca Formation in Argentina provide important regional and global correlations, particularly in poorly known deep marine environments. The fossils collected include late Sandbian Climacograptus bicornis Zone graptolites and Amorphognathus tvaerensis Zone conodonts. The presence of early Sandbian Nemagraptus gracilis Zone graptolites is also reported, expanding the understanding of this geological time period.
ESTONIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Jan Srodon, Daniel J. Condon, Elena Golubkova, Ian L. Millar, Oksana Kuzmenkova, Mariusz Paszkowski, Stanislaw Mazur, Artur Kedzior, Daniel Drygant, Valerian Ciobotaru, Sirle Liivamagi
Summary: Combined single zircon crystal CA-ID-TIMS U-Pb dating, micropaleontological study, and quantitative XRD analysis were used to correlate sections of the Podillya-Moldova Ediacaran succession with sections of the Volyn Large Igneous Province (Volyn LIP). The Volyn LIP activity had two phases: a first phase of mafic and felsic magmatism lasting from c.580 to 567 Ma, and a second phase of pyroclastic felsic magmatism lasting from 567 to c.545 Ma. The Podillya Ediacaran succession corresponds to the felsic phase of the Volyn LIP.
PRECAMBRIAN RESEARCH
(2023)
