Article
Plant Sciences
Edlley M. Pessoa, Alexandre C. Ribeiro, Nathan A. Jud
Summary: The newly discovered fossil leaf Baderadea pinnatissecta has simple morphology similar to some herbaceous Ranunculales. By comparing the leaf architecture with ferns, gymnosperms, and similar angiosperms, the fossil is confirmed to be an herbaceous eudicot angiosperm with unique characteristics.
AMERICAN JOURNAL OF BOTANY
(2021)
Article
Geochemistry & Geophysics
Milena Cristina Rosa, Norberto Morales, Mario Luis Assine
Summary: The Precambrian Patos Shear Zone (PASZ) and associated faults played a crucial role in the evolution of the Araripe Basin in northeastern Brazil. The study reveals two reactivations of the PASZ, which resulted in stress inversion during basin evolution.
Article
Geosciences, Multidisciplinary
Maria Alcione Lima Celestino, Tiago Siqueira Miranda, Gorki Mariano, Marcio Lima Alencar, Jim Buckman, Nick M. W. Roberts, Jose Antonio Barbosa, Virginio H. M. L. Neumann, Jorge Andre Braz Souza, Eduardo Roemers-Oliveira
Summary: This study aims to understand the control of the Triunfo Fault Zone on the development of carbonate breccia pipes in the Crato Formation and constrain the timing of brittle deformation. Results suggest that polyphasic deformation in the pipes may be caused by the circulation of fluid along pre-existing faults and pipes.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Eduardo Premaor, Elizabete P. Ferreira, Paulo A. Souza, G. Raquel Guerstein, Mitsuru Arai
Summary: This study conducted taxonomic and biochronostratigraphic analyses of dinoflagellate cysts from 26 cutting samples from well 1-SCS-2 in the northern part of the Pelotas Basin, revealing that the palynological assemblages are composed of continental and marine taxa, dominated by dinoflagellate cysts. Six palynochronostratigraphic intervals were defined in the sediments of the Imbe acute accent Formation and the Cidreira Formation.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Multidisciplinary Sciences
Damares Ribeiro Alencar, William Santana, Allysson Pontes Pinheiro, Daniel Lima, Antonio Alamo Feitosa Saraiva, Gustavo Ribeiro de Oliveira
Summary: We describe a new stenopodidean shrimp, Dubiostenopus parvus n. gen. n. sp., from the Romualdo Formation of Brazil. This is the first stenopodidean shrimp described from the Romualdo Formation and South America. The specimen is approximately 10 mm in length with a robust cephalothorax and well-developed cheliped.
Article
Zoology
Maria Emilia Tome, Rilda Araripe, David Oliveira, Alcina Barreto, Ludmila Prado, Flavia Pedrosa, Priscilla Pereira, Luiz Ricardo Nascimento, Christiano Ng
Summary: A systematic study was conducted on Early Cretaceous ostracod assemblages from the Santo Antônio section in the Araripe Basin, Brazil. The section represents one of the first marine ingression events during the formation of the Atlantic Ocean. The study identified 15 taxa, including six brackish ostracods and nine typically brackish-marine species, with seven new species. This detailed taxonomic study provides new insights into marine ostracods around the upper Aptian/lower Albian boundary in the Araripe Basin.
Article
Geology
Francisco Irineudo Bezerra, Monica M. Solorzano-Kraemer, Marcio Mendes
Summary: This study compares the taphonomic characteristics of kerogenized and pyritized fossil insects in the Crato Formation of northeastern Brazil, revealing that pyritized insects have higher preservation quality than kerogenized insects, contrary to previous findings. The study provides insight into the taphonomic bias resulting from different preservation pathways in insect fossils within the same geological setting.
CRETACEOUS RESEARCH
(2021)
Article
Geography, Physical
Alexander Wheeler, Jian Shen, Tim A. Moore, Ofentse M. Moroeng, Jingjing Liu
Summary: In this study, we analyzed the palynology, organic petrography, and carbon isotopes of the #16 Seam in the Hailar Basin, Inner Mongolia, China. Our results showed a diverse microflora consisting of ferns, conifers, horsetails, lycopsids, bryophytes, ginkgoes, and cycads. The accumulation of the coal was likely controlled by rising water table, flooding, and fires. The top of the coal seam indicated the gradual drowning of the paleomire. Interestingly, no angiosperm pollen was found in the samples, suggesting they were not adapted to the extreme conditions of the mire.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
Yitian Yin, Laiming Zhang, Xue Gu, Runsheng Yin, Yixiong Wen, Tianjie Jin, Chengshan Wang
Summary: This study reveals that the uppermost Cretaceous-lowermost Paleogene strata in the low-latitude Nanxiong Basin exhibit an extremely high mean annual terrestrial temperature, which may be attributed to the Deccan Traps volcanism and the extremely hot and arid regional climate.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geology
Rilda C. Araripe, David H. Oliveira, Maria E. Tome, Renata Moura de Mello, Alcina M. F. Barreto
Summary: This study investigated the Aptian-lower Albian microfossil association in the Romualdo Formation in the Araripe Basin, northeastern Brazil, identifying nine species of foraminifera and five species of ostracods from various environments. Three assemblages were identified and their stratigraphic position was determined for each outcrop, suggesting different marine influences in the south-central versus southwestern portions of the basin. The presence of the foraminifera genus Agathammina indicates an affinity with the Tethyan fauna, leading to the conclusion that the marine ingression during the Aptian-Albian followed a north-northeast direction, reaching initially the south-central part of the basin.
CRETACEOUS RESEARCH
(2021)
Article
Plant Sciences
Leandro C. A. Martinez, Ana Archangelsky, Sergio Archangelsky
Summary: Well-preserved and diverse Early Cretaceous palynological assemblages were studied from the Springhill Formation in Patagonia, Argentina. The palynomorphs and angiosperm pollen grains found provide evidence of the paleoenvironment and paleoclimate of the area and suggest an early diversification of angiosperms in Patagonia during the Cretaceous period.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2023)
Article
Plant Sciences
Maria Edenilce P. Batista, Maria Iracema B. Loiola, Arlete A. Soares, Alexandra A. Mastroberti, Artur A. Sa, Daniel Rodrigues Nascimento, Wellington Ferreira Silva Filho, Lutz Kunzmann
Summary: This study describes a new species of fossil Araucaria plant found in the Araripe Basin and identifies mucilage cells in the leaves. The discovery suggests new insights into plant evolution within the Araucariaceae family.
INTERNATIONAL JOURNAL OF PLANT SCIENCES
(2022)
Article
Geography, Physical
Marlone H. H. Bom, Daiane Ceolin, Karlos G. D. Kochhann, Guilherme Krahl, Gerson Fauth, Cristianini T. Bergue, Jairo F. Savian, Oscar Strohschoen Junior, Marcello G. Simoes, Mario L. Assine
Summary: The study on the sedimentary strata of the Romualdo Formation reveals that during the Late Aptian, the presence of ostracods, benthic foraminifera, bivalves, and gastropods coincided with levels of relatively high paleosalinity estimates, indicating dysoxic to anoxic bottom water conditions. The upper part of the highstand systems tract shows deposits in coastal environments, characterized by higher zirconium/rubidium ratios and increased phytoclasts and terrigenous contents.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geology
Zewei Wang, Yun Xu, Qiaojing Zhao, Minmin Zhang, Weixu Li, Balaji Panchal, Bangjun Liu
Summary: Wildfires played a significant role in the climate and vegetation evolution during the Cretaceous greenhouse period. The study of peatland wildfires in the Lower Cretaceous Damoguaihe Formation revealed frequent occurrence of wildfires, dominated by low-temperature fires. The vertical variation of combustion products indicated changes in frequency and intensity of wildfires during deposition. The presence of angiosperm-derived charcoal suggests adaptation of angiosperms to the harsh peatland environment. © 2023 Elsevier Ltd. All rights reserved.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Renan Alfredo Machado Bantim, Rafael Cesar Lima Pedroso de Andrade, Jennyfer Sobreira Ferreira, Antonio Alamo Feitosa Saraiva, Alexander Wilhelm Armin Kellner, Juliana Manso Sayao
Summary: This study describes a pteranodontoid pterosaur with anhanguerid affinities, which comes from the Araripe Basin in Brazil. The specimen is large in size but considered to be immature. Its ontogenetic stage is established by comparing skeletal fusion and detailed osteohistological analyses.
CRETACEOUS RESEARCH
(2021)
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)