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
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
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
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
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
M. G. Rodrigues, F. G. Varejao, S. A. Matos, F. T. Fuersich, L. V. Warren, M. L. Assine, M. G. Simoes
Summary: This study explains the sedimentary environment, bed-by-bed accumulation history, and carbonate microfacies of the Aptian Romualdo Formation in the Araripe Basin, Brazil, revealing high-frequency details in a restricted shallow sea setting. The shell beds are multi-event carbonate deposits generated by the superposition of various processes.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Energy & Fuels
Yunong Wu, Hongqi Yuan, Yinghua Yu, Shanshan Zhang, Weibin Ruan
Summary: This study discusses the atypical Gilbert-type delta deposition of the Damoguaihe Formation, characterized by mudstone-dominated foresets. It emphasizes the importance of understanding the depositional properties for hydrocarbon exploration and highlights the potential exploration risks posed by fine-grained lithologic aspects.
Article
Geology
Mateus Kroth, Leonardo Borghi, Fabia E. R. Bobco, Bruno Cesar Araujo, Luis Fernando Silveira, Guilherme Duarte, Lais de Oliveira Ferreira, Margot Guerra-Sommer, Joalice de Oliveira Mendonca
Summary: This study conducted a sedimentological analysis of the coquina interval in the Aptian Romualdo Formation in the Araripe Basin, revealing the establishment of an epeiric sea in the region during the Early Cretaceous, the impact of sea-level fluctuations on paleogeographical configurations, and variations in sedimentary environments.
SEDIMENTARY GEOLOGY
(2021)
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
Energy & Fuels
Penglin Zhang, Qingtao Meng, David Misch, Reinhard F. Sachsenhofer, Zhaojun Liu, Fei Hu, Lin Shen
Summary: Lacustrine oil shale in the Beipiao Basin was characterized by the presence of well-preserved fossils, with organic matter primarily sourced from phytoplankton and aquatic algal-bacterial organisms. High-quality oil shales were deposited under anoxic freshwater conditions, with low terrigenous detrital input, indicating a warm and humid paleoclimate.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
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
Zoology
Olga Alcantara Barros, Paulo Victor de Oliveira
Summary: This study describes a new fossil shrimp, Somalis piauiensis, from the Araripe Basin. The fossil has a carapace with antennal and branchiostegal spines, as well as a long rostrum with thirteen dorsal spines giving it a serrate appearance. The laminar scaphocerite is large and has a weakly rounded lateral margin, and is longer than the rostrum. This is the first occurrence of a shrimp fossil in the Piaui territory.
Article
Multidisciplinary Sciences
Caizhi Shen, Rodrigo Pegas, Chunling Gao, Martin Kundrat, Lijun Zhang, Xuefang Wei, Xuanyu Zhou
Summary: The article explores the taxonomy of tapejarine specimens, focusing on a new postcranial specimen of Sinopterus dongi from the Jiufotang Formation in China. While abundant specimens exist, detailed revisions on the taxonomic issues are still lacking, highlighting the need for further comparative studies and taxonomic revisions.
Article
Geosciences, Multidisciplinary
Li Li, Lian Jiang, Simon C. George, Zhaojun Liu
Summary: The analysis of aromatic compounds in lacustrine sediment samples from the Jiufotang Formation in the Chaoyang Basin revealed different characteristics in terms of environmental, maturity, and source-related parameters, indicating variations influenced by sedimentary environment, early productivity, and organic matter sources.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Marcia Fernandes Aquino dos Santos, Ingrid Mattos, Jose Ricardo M. Mermudes, Sandro Marcelo Scheffler, Pedro Reyes-Castillo
Summary: Species with a xylobiont lifestyle are rarely fossilized due to taphonomic reasons. The discovery of a new genus and species of Passalidae fossil provides insights into the origin and radiation of terrestrial Coleoptera, suggesting the family has existed for over 150 million years.
CRETACEOUS RESEARCH
(2021)
Article
Biology
Xin Cheng, Renan A. M. Bantim, Juliana M. Sayao, Alexander W. A. Kellner, Xiaolin Wang, Antonio A. F. Saraiva
HISTORICAL BIOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Ricardo Pereira, Flaviana Jorge de Lima, Felipe M. Simbras, Sheila Maria Bretas Bittar, Alexander Wilhelm Annin Kellner, Antonio Alamo F. Saraiva, Renan A. M. Bantim, Juliana M. Sayao, Gustavo R. Oliveira
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Multidisciplinary Sciences
He Chen, Shunxing Jiang, Alexander W. A. Kellner, Xin Cheng, Xinjun Zhang, Rui Qiu, Yang Li, Xiaolin Wang
Article
Multidisciplinary Sciences
Juliana Manso Sayao, Antonio Alamo Feitosa Saraiva, Arthur Souza Brum, Renan Alfredo Machado Bantim, Rafael Cesar Lima Pedroso de Andrade, Xin Cheng, Flaviana Jorge de Lima, Helder de Paula Silva, Alexander W. A. Kellner
SCIENTIFIC REPORTS
(2020)
Correction
Multidisciplinary Sciences
Juliana Manso Sayao, Antonio Alamo Feitosa Saraiva, Arthur Souza Brum, Renan Alfredo Machado Bantim, Rafael Cesar Lima Pedroso de Andrade, Xin Cheng, Flaviana Jorge de Lima, Helder de Paula Silva, Alexander W. A. Kellner
SCIENTIFIC REPORTS
(2020)
Correction
Multidisciplinary Sciences
Xiaolin Wang, Taissa Rodrigues, Shunxing Jiang, Xin Cheng, Alexander W. A. Kellner
SCIENTIFIC REPORTS
(2020)
Article
Ecology
Allysson P. Pinheiro, Antonio Alamo Feitosa Saraiva, William Santana, Juliana Manso Sayao, Rodrigo Giesta Figueiredo, Taissa Rodrigues, Luiz Carlos Weinschutz, Luiza Corral Martins de Oliveira Ponciano, Alexander Wilhelm Armin Kellner
Article
Multidisciplinary Sciences
Geovane Alves de Souza, Marina Bento Soares, Arthur Souza Brum, Maria Zucolotto, Juliana M. Sayao, Luiz Carlos Weinschutz, Alexander W. A. Kellner
Article
Multidisciplinary Sciences
Arianny P. Storari, Taissa Rodrigues, Renan A. M. Bantim, Flaviana J. Lima, Antonio A. F. Saraiva
Summary: This study provides insight into a mass mayfly mortality event in the Crato Formation, revealing the biological community structure and environmental changes in this layer. The findings suggest that the palaeolake in the Crato Formation likely experienced high evaporation during dry seasons, impacting the fauna living in this setting.
SCIENTIFIC REPORTS
(2021)
Article
Biology
Arianny P. Storari, Roman J. Godunko, Frederico F. Salles, Antonio A. F. Saraiva, Arnold H. Staniczek, Taissa Rodrigues
Summary: Among mayflies, the Hexagenitidae is the most common family in the Cretaceous, particularly in the world-renowned Crato Formation in northeastern Brazil. This study provides a checklist and revision of some previously described species from the Crato Formation, introduces a new species, and describes new specimens. The findings contribute to the taxonomical and morphological diversity of the adult mayfly fauna in the Crato Formation.
HISTORICAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Richard Buchmann, Borja Holgado, Gabriela Sobral, Leonardo dos Santos Avilla, Taissa Rodrigues
Summary: Research on the postcranial skeletal pneumaticity in pterosaurs often lacks quantitative assessments, but a study on an anhanguerine pterosaur found that the Air Space Proportion (ASP) in the vertebrae ranged from 68% to 72%. The results also showed that the neural arch had a higher ASP in all vertebrae.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Flaviana Jorge de Lima, Juliana Manso Sayao, Luiza C. M. de Oliveira Ponciano, Luiz C. Weinschutz, Rodrigo G. Figueiredo, Taissa Rodrigues, Renan Alfredo Machado Bantim, Antonio Alamo Feitosa Saraiva, Andre Jasper, Dieter Uhl, Alexander W. A. Kellner
Summary: The Cretaceous high-fire period was a global event that affected plant communities on almost all continental masses. Researchers discovered fossilized macro-charcoal on James Ross Island, confirming the occurrence of paleo-wildfires in the Santa Marta Formation in the Campanian vegetation. This discovery adds new information to the paleo-wildfire scenario for Gondwana.
Article
Multidisciplinary Sciences
Arianny P. Storari, Taissa Rodrigues, Antonio A. F. Saraiva, Frederico F. Salles
Article
Zoology
Rafael G. Souza, Rodrigo G. Figueiredo, Sergio A. K. Azevedo, Douglas Riff, Alexander W. A. Kellner
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2020)
