Article
Geography, Physical
Eliott Capel, Christopher J. Cleal, Thomas Servais, Borja Cascales-Minana
Summary: The Silurian-Devonian plant radiation was triggered by the colonization of subaerial habitats. The diversity patterns of early land plants varied across different palaeogeographical units, with apparent events of diversification and extinction. Global diversity patterns are mostly similar to the historically best-sampled continent, but changes in floral composition through time reveal geographical disparities.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Alejandra Dalenz Farjat, Mario Suarez Riglos, Jose Luis Ortiz
Summary: This study investigates the distribution patterns and paleoecological strategies of Ludlow-Pridoli and Devonian Bivalves in the Bolivian Central Andean Basin. The research reveals the affinities between different regions and discusses the factors influencing the distribution of these bivalves.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Yang Chen, Zhikun Gai, Qiang LI, Jianhua Wang, Lijian Peng, Guangbiao Wei, Min Zhu
Summary: A new genus and species of agnathan fish, Yongdongaspis littoralis gen. et sp. nov., has been discovered in the Llandovery Huixingshao Formation in southwestern China. This fish exhibits transitional characteristics between Sinogaleaspidae and a higher group of eugaleaspidiforms. Phylogenetic analysis confirms Yongdongaspis as a sister taxon of this higher group. This discovery provides new fossil evidence for the subdivision and correlation of the Upper Red Beds in South China.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Review
Geosciences, Multidisciplinary
Eliott Capel, Christopher J. Cleal, Jinzhuang Xue, Claude Monnet, Thomas Servais, Borja Cascales-Minana
Summary: This study characterizes the development of Silurian-Devonian vegetation and discusses how different plant groups impacted diversity and evolutionary rates. The findings suggest a stepwise pattern of origination and extinction events that led to major floral transitions. Furthermore, the study shows a significant correlation between observed diversity and sampling effort, indicating the potential influence of sampling bias.
EARTH-SCIENCE REVIEWS
(2022)
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)
Article
Paleontology
David J. Holloway
Summary: The study describes the trilobites of Wenlock age from northern Arkansas and south-central Oklahoma, highlighting their close links with other Wenlock faunas of southern Laurentia, as well as with Avalonia and Baltica. The research also proposes a new lichid genus and clarifies the taxonomy of certain trilobite species.
PALAEONTOGRAPHICA ABTEILUNG A-PALAOZOOLOGIE-STRATIGRAPHIE
(2021)
Article
Geology
Heinrich Bahlburg
Summary: This study discusses the geological evolution of the Devonian southern Andes, highlighting the period of Silurian-Devonian lull and the evidence of volcanic magmatism found in northern Chile. It provides a new perspective for studying the tectonic evolution of the region.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
David J. Holloway, Maxwell R. Banks, Doris M. Banks
Summary: Thirteen species of trilobites from late Katian and Rhuddanian strata in the Arndell Sandstone of the Florentine Valley in southern Tasmania are described. The faunal affinities of the trilobites suggest links with terranes along the north-western margin of Gondwana, South America in the Late Ordovician, South China and possibly Laurentia in the early Silurian.
BULLETIN OF GEOSCIENCES
(2022)
Article
Geology
Monica Oliveira Manna, Claiton Marlon dos Santos Scherer, Manoela Bettarel Ballico, Adriano Domingos dos Reis, Lucas Vargas Moraes, Lorenza Augusta Belitzki Ferrari, Henrique Berger Roisenberg, Victor Gualberto de Oliveira
Summary: Based on field data from the Jaicos Formation in NE Brazil, this study analyzes the architecture and changes in fluvial deposition, identifying two distinct fluvial units with different flow regimes. Fluvial unit 1 represents a system with low discharge variability, while unit 2 represents a system with high discharge variability.
SEDIMENTARY GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Monera Adam Shoieb, Haylay Tsegab Gebretsadik, Omeid Rahmani, Mohd Suhaili Ismail, Syed Muhammad Ibad
Summary: The hydrocarbon potential of the Silurian-Devonian Kroh black shales in Peninsular Malaysia was investigated in this study through XRD and XRF analysis, which also provided information on depositional conditions and organic matter thermal maturity. The results revealed that the black shales originated from an intermediate to felsic igneous rock with marine sources of organic matter, and have preserved a fair to a good quantity of organic matter richness. The analysis also indicated that the Kroh black shales are at a minimal level of hydrocarbon generation, suggesting limited commercial potential for the Kroh Formation.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Zoology
Zoya A. Tolokonnikova, Petr V. Fedorov
Summary: This study describes new bryozoan species found in Southern Kazakhstan, providing insights into the connections between different regions during the late Devonian-early Carboniferous.
Article
Geosciences, Multidisciplinary
David P. West, Emily M. Peterman, Jessica Chen
Summary: The study reveals the tectonic evolution from the Ordovician to the Silurian-Devonian in the mid-coastal region of Maine. The initial terrane juxtapositioning along the east-verging Boothbay thrust fault before 423Ma was followed by the intrusion of ultra-potassic magma around 413Ma. These findings provide constraints on the long-lived Acadian deformation and metamorphism associated with the outboard accretion of the Avalonian micro-continent.
AMERICAN JOURNAL OF SCIENCE
(2021)
Article
Geochemistry & Geophysics
Xinwei Hu, Liang Gao, Qingfei Wang, Shihong Zhang, Xiang Sun, Shengchao Xue, Xin Tang, Zhenyu Yang, Jun Deng
Summary: We conducted systematic studies on the Dapingzhang VMS deposit to investigate the unclear relationship between mineralization, hydrothermal alteration, and rock magnetization. We found that magnetite is the dominant magnetic carrier and its concentration decreases from chloritization to mineralization. We also discovered secondary magnetite formation during different types and stages of hydrothermal alteration. This research provides insights into magnetic mineral variation and remagnetization during VMS mineralization.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geology
Maria Gajewska
Summary: The Middle Devonian was a significant period for the evolution of foraminifera, with the emergence of the first true calcareous multilocular taxa. This study presents and describes these unique foraminifera, as well as their taxonomic classification, paleobiogeography, and paleoenvironmental indicators.
ANNALES SOCIETATIS GEOLOGORUM POLONIAE
(2022)
Article
Geosciences, Multidisciplinary
Wenjin Zhao, Xiaolin Zhang, Guodong Jia, Yan'an Shen, Min Zhu
Summary: The Silurian-Devonian interval is crucial for the rise of sarcopterygian fishes and terrestrial vascular plants. Geochemical indicators from East Yunnan reveal significant shifts, aiding in determining the lungfish-tetrapod split period. This boundary in East Yunnan has provided valuable data for understanding the geological ages of fish-bearing strata, supporting the estimated split between lungfish and tetrapods.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Evolutionary Biology
Xianguang Hou, Mark Williams, Sarah Gabbott, David J. Siveter, Derek J. Siveter, Peiyun Cong, Xiaoya Ma, Robert Sansom
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2017)
Article
Biology
Robert S. Sansom, Matthew A. Wills
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2017)
Article
Biology
Robert S. Sansom, Peter G. Choate, Joseph N. Keating, Emma Randle
Article
Multidisciplinary Sciences
Lauren Sallan, Matt Friedman, Robert S. Sansom, Charlotte M. Bird, Ivan J. Sansom
Article
Zoology
Andrew R. Brinkworth, Robert Sansom, Matthew A. Wills
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2019)
Article
Biology
Emma Randle, Robert S. Sansom
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2019)
Article
Evolutionary Biology
Joseph N. Keating, Robert S. Sansom, Mark D. Sutton, Christopher G. Knight, Russell J. Garwood
SYSTEMATIC BIOLOGY
(2020)
Article
Paleontology
Humberto G. Ferron, Jenny M. Greenwood, Bradley Deline, Carlos Martinez-Perez, Hector Botella, Robert S. Sansom, Marcello Ruta, Philip C. J. Donoghue
Article
Ecology
Martin D. Brazeau, Sam Giles, Richard P. Dearden, Anna Jerve, Ya Ariunchimeg, E. Zorig, Robert Sansom, Thomas Guillerme, Marco Castiello
NATURE ECOLOGY & EVOLUTION
(2020)
Article
Paleontology
Sarah E. Gabbott, Robert S. Sansom, Mark A. Purnell
Summary: The study establishes a quantitative approach that combines data from decay experiments of extant taxa with preservation mode of fossils to evaluate information loss and retention in non-biomineralized fossils. It demonstrates that occurrence frequency of characters in fossils is correlated with character decay sequences observed in extant organisms, and decay prone characters are mineralized while decay resistant characters are organically preserved.
Article
Paleontology
Jane C. Reeves, Roy A. Wogelius, Joseph N. Keating, Robert S. Sansom
Summary: Reassessment of the anatomy of the enigmatic Lasanius from the Silurian period using modern techniques clarifies its vertebrate affinities and supports its position as an early stem-cyclostome. The study highlights the importance of increasing confidence in the anatomy of key early vertebrate taxa for a more stable understanding of vertebrate evolution.
Article
Biology
Jane C. Reeves, Robert S. Sansom
Summary: Exceptionally preserved fossils of soft-bodied organisms provide unique evidence for evolutionary history, but different approaches often lead to divergent reconstructions of taxa due to the challenges in disentangling ontogeny, taphonomy, and phylogeny. This study employs a multivariate ordination method using morphological character data from modern taxa to analyze morphological variation in fossil specimens. The results show that all three factors play a role in the variation observed in early vertebrates, highlighting the power of multivariate approaches to fossil interpretation.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Multidisciplinary Sciences
Martin. D. D. Brazeau, Haobo Yuan, Sam Giles, Anna. L. L. Jerve, E. Zorig, Ya. Ariunchimeg, Robert. S. S. Sansom, Robert. C. C. Atwood
Summary: The origin of jaws and teeth in vertebrate evolution is the subject of debate, with placoderms being key species. However, the structures of these placoderms, particularly their jaws, are poorly understood. By analyzing a near-complete upper jaw of an acanthothoracid, researchers were able to determine the bite position and compare its morphology with other placoderm groups. The study shows that the bite location for most placoderms is on the upper jaw cartilage, rather than on the dermal cheek, and suggests a biomechanical basis for the origin of jaws.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Biology
Thomas J. J. Smith, Robert S. S. Sansom, Davide Pisani, Philip C. J. Donoghue
Summary: Analyses of morphological disparity examine how phenotypic variation changes through time by incorporating living and fossil taxa. However, non-random patterns of data loss in fossil data due to taphonomic processes could distort perceptions of disparity. This study investigates the effects of random and structured data loss on measures of disparity and suggests caution in extrapolating general patterns in disparity from datasets that may only represent a subset of traits sampled.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biology
Dayou Zhai, Mark Williams, David J. Siveter, Thomas H. P. Harvey, Robert S. Sansom, Sarah E. Gabbott, Derek J. Siveter, Xiaoya Ma, Runqing Zhou, Yu Liu, Xianguang Hou
COMMUNICATIONS BIOLOGY
(2019)