Review
Zoology
Maria Alejandra Abello, Gabriel M. Martin, Yamila Cardoso
Summary: The systematic review of extinct species in the family Caenolestidae reveals it as a monophyletic group with three new taxa recognized. Stilotherium is the earliest diverging lineage, with C. miocaenicus being the extinct species most closely related to extant caenolestids.
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2021)
Article
Paleontology
Narla S. Stutz, Patricia Hadler, Francisco R. Negri, Laurent Marivaux, Pierre-Olivier Antoine, Francois Pujos, Tiago R. Jaco, Emmanuelle M. Fontoura, Leonardo Kerber, Annie S. Hsiou, Roberto ventura Santos, Andre M. V. Alvim, Ana Maria Ribeiro
Summary: The Amazonian region has significant biodiversity, but its history, especially regarding marsupials, is still largely unknown. Recent paleontological field efforts in Northwestern Brazil have led to the discovery of fossil marsupial teeth, providing new insights into the ancient fauna of the area.
ACTA PALAEONTOLOGICA POLONICA
(2023)
Article
Paleontology
Luis Otavio Rezende Castro, Daniel A. Garcia-Lopez, Lilian Paglarelli Bergqvist, Herminio Ismael de Araujo-Junior
Summary: The study describes a new basal notoungulate species, Nanolophodon tutuca gen. et sp. nov., with unique characteristics that distinguish it from traditional henricosborniids. The identification of the paraconid in notoungulates and the potential synonymy between Itaboraitherium atavum and Othnielmarshia pristina are also discussed, questioning their classification within the henricosborniid group based on complex dental patterns.
Article
Geology
Paula Braga Adler, Luiz Fernando De Ros, Katia Leite Mansur, Andre Luiz Ferrari, Luiz Alberto Fernandes, Alcides Nobrega Sial
Summary: The Itaborai Basin, located in Rio de Janeiro state, is the smallest segment of the Southeastern Brazil Continental Rift and first opened during the Palaeocene. Studies on the basin have focused on its fossiliferous content, but few have explored its depositional and diagenetic processes. Detailed analysis of the basal sedimentary deposits has provided insight into the initial tectono-sedimentary conditions responsible for basin formation, with calcretes and travertines showing diverse microscopic features and morphogenetic stages. Tectonic activity, humid climate, and hydrothermal processes played key roles in the early evolution of the basin, with potential implications for understanding the South Atlantic Aptian Pre-Salt lacustrine deposits.
Article
Zoology
Laura Chornogubsky
Summary: Polydolopidae is a family of Palaeogene marsupials found in outcrops in southern South America and the Antarctic Peninsula. Through taxonomic revision and phylogenetic analysis, new genera and species within the family have been identified. The family appeared in the early Palaeocene and went extinct during the Early Oligocene, possibly due to climatic deterioration.
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2021)
Article
Geosciences, Multidisciplinary
Juliana M. Leme, Heyo Van Iten, Marcello G. Simoes
Summary: In this study, a new species Paraconularia ediacara, the oldest documented conulariid cnidarian, is described based on a compressed thin specimen from the terminal Ediacaran Tamengo Formation near Corumba, Brazil. The specimen shows bell-curve-shaped, nodose transverse ribs and provides compelling evidence of homology with a particular conulariid genus. The discovery of P. ediacara supports the hypothesis that cnidarians originated during mid-late Proterozoic times and provides a new internal calibration point for dating the split between scyphozoan and cubozoan cnidarians.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Microbiology
Luciana G. Oliveira, Mayara G. Kettner, Maria Luiza S. Lima, Mariele P. Carneiro Leao, Ana Carla da S. Santos, Antonio F. Costa
Summary: The study aimed to isolate, identify, and report the species richness of Trichoderma species in the soil of different regions of Pernambuco, Brazil. DNA sequences of 56 isolates were analyzed, revealing two sections, Trichoderma (35 isolates) and Pachybasidium (21 isolates), and a total of nine species, including possible new species. The findings indicate the potential for agricultural applications due to the diversity of Trichoderma species in Pernambuco soils.
CURRENT MICROBIOLOGY
(2023)
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
Edison Vicente Oliveira, Leonardo M. Carneiro, Francisco J. Goin
Summary: A new small-sized metatherian from the early Eocene period has been discovered in Brazil, showing primitive features and likely having an insectivorous diet.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2021)
Article
Geosciences, Multidisciplinary
C. C. Rangel, L. M. Carneiro, E. V. Oliveira
Summary: The Itaborai fauna has preserved two of the oldest known sparassodonts in South America, Patene simpsoni and Nemolestes brasiliensis. This article presents new fossil evidence of Nemolestes brasiliensis and assigns it to a new genus, Silvenator. Phylogenetic analysis suggests that Silvenator is closely related to the thylacinid Badjcinus and, to a lesser extent, Allqokirus. This study further supports the hypothesis that the Itaborai fauna only contains early lineages of sparassodonts.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Multidisciplinary Sciences
Diego J. Santana, Leandro Alves da Silva, Anathielle Caroline Sant'Anna, Donald B. Shepard, Sarah Mangia
Summary: A new species of Proceratophrys from southern Amazonia in Brazil has been described based on differences in morphology, male advertisement call, and genetic distance. This new species is most similar to P. concavitympanum and P. ararype but can be distinguished by its larger eyes and unique features of the advertisement call. The species is only known from its type locality and faces threats from illegal activities and development projects.
Article
Neurosciences
Jyothi Thittamranahalli Kariyappa, Simone Zanoni, Andre Bongers, Lydia Tong, Ken W. S. Ashwell
Summary: The study mapped brain regions and connections in a diprotodontid marsupial using high-field microstructural MRI. They identified new cortical connectivity patterns and emphasized the importance of these findings for understanding mammalian brain evolution.
JOURNAL OF COMPARATIVE NEUROLOGY
(2022)
Article
Zoology
Raymond H. Bate, David J. Horne, Sarah E. Horne, Lyndsey Douglas, C. Giles Miller, Alan R. Lord
Summary: This study re-illustrates the type materials of 10 genera, one subgenus, 110 species, and 28 subspecies described by Wicher et al. (1959), Krommelbein et al. (1961, 1962, 1963, 1964a,b, 1965a,b), Krommelbein & Weber (1971), and Bate (1972, 1994) using optical digital technology, aiming to provide a standard reference for future systematic work and its biostratigraphical and palaeoenvironmental application.
Article
Physics, Multidisciplinary
Wei Jiang, Duarte J. P. de Sousa, Jian-Ping Wang, Tony Low
Summary: A novel approach to achieve a giant anomalous Hall effect in materials with flat bands by decreasing electronic bandwidth to increase momentum separation is proposed. This approach can be realized experimentally through strain engineering in pyrochlore and spinel compounds.
PHYSICAL REVIEW LETTERS
(2021)
Article
Evolutionary Biology
Norberto P. Giannini, Miriam M. Morales, Laura A. B. Wilson, Paul M. Velazco, Fernando Abdala, David A. Flores
Summary: Marsupials are a major representation of mammalian diversification, confined geographically to the Americas and Australasia. Their cranial morphospace is influenced by size, shape trends, and evolutionary convergence, showing marked patterns of ecological and phylogenetic structuring. While some groups exhibit convergence, others show remarkable evolutionary divergence, with varying rates of evolution across different forms. Extinct forms are expected to fill in space voids and potentially increase intra- and intercontinental convergence.
JOURNAL OF MAMMALIAN EVOLUTION
(2021)
Article
Evolutionary Biology
Laura Chornogubsky, A. Natalia Zimicz, Francisco J. Goin, Juan C. Fernicola, Patricio Payrola, Magali Cardenas
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2019)
Article
Evolutionary Biology
Francisco J. Goin, Emma C. Vieytes, Javier N. Gelfo, Laura Chornogubsky, Ana N. Zimicz, Marcelo A. Reguero
JOURNAL OF MAMMALIAN EVOLUTION
(2020)
Article
Geosciences, Multidisciplinary
Edison V. Oliveira, Petrius S. Belo, Gelson L. Fambrini, Alcides N. Sial, Ana K. B. Silva, Alcina M. F. Barreto
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Environmental Sciences
Juliana Guzman-Gonzalez, Alcides N. Sial, Enelise Katia Piovesan, Edison Vicente Oliveira, Gelson Luis Fambrini
JOURNAL OF PALEOLIMNOLOGY
(2020)
Article
Evolutionary Biology
Ana Natalia Zimicz, Francisco Javier Goin
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2020)
Article
Biology
Luana C. Andrade, Fernando H. de S. Barbosa, Luiza B. Melki, Edison Oliveira, Herminio de Araujo-Junior, Vanderlei Maniesi
Summary: A study conducted on a fossil mammal assemblage in northeastern Brazil identified four different types of diseases, primarily found in a giant ground sloth and an indeterminate mammal species, expanding the understanding of disease occurrences in xenarthras species.
HISTORICAL BIOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Johnson Sarmento de Oliveira Nascimento, Edison Vicente Oliveira, Jorge Luiz Lopes da Silva
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Paleontology
Luana Cardoso de Andrade, Edison Vicente Oliveira, Dimila Mothe, Vanderlei Maniesi
REVISTA BRASILEIRA DE PALEONTOLOGIA
(2020)
Article
Evolutionary Biology
Juan Carlos Fernicola, Ana N. Zimicz, Laura Chornogubsky, Mihai Ducea, Laura E. Cruz, Mariano Bond, Michelle Arnal, Magali Cardenas, Mercedes Fernandez
Summary: Recent research has identified the basal beds of the lower section of the Lumbrera Formation as early Eocene deposits dating between 55-46.2 Ma, based on a succession of hyperthermal events. The study also presents one of the oldest cingulate assemblages in America from the early Eocene hyperthermal period, indicating an early diversification of the Cingulata during the Paleocene.
JOURNAL OF MAMMALIAN EVOLUTION
(2021)
Article
Geosciences, Multidisciplinary
Juan Carlos Fernicola, Ana Natalia Zimicz, Laura Chornogubsky, Laura Edith Cruz, Mariano Bond, Michelle Arnal, Magali Cardenas, Mercedes Fernandez
Summary: This text discusses the cingulate assemblage found in the Eocene deposits of Northwestern Argentina, reclassifying and discussing these groups based on a new geochronological framework, involving different periods such as Mustersan SALMA, Casamayoran SALMA, and Itaboraian SALMA.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Biology
Natalia Zimicz, M. Fernandez, M. Bond, L. Chornogubsky, J. C. Fernicola
Summary: A new remain of a SANU, named Kyraodus churcalensis gen. et. sp nov., is described from the lower levels of the Lumbrera Formation. It possesses distinct features such as brachydont and bunodont molars, a larger talonid compared to the trigonid, and an intact distal wall of the metaconid. Cladistic analysis revealed its position within a clade including Mioclaenidae, Litopterna, Didolodontidae, and Phenacodontidae, separate from Notoungulata plus Kollpaniidae. This study highlights the significance of Northwestern Argentina for the early radiation of native ungulates.
HISTORICAL BIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
C. C. Rangel, L. M. Carneiro, E. V. Oliveira
Summary: The Itaborai fauna has preserved two of the oldest known sparassodonts in South America, Patene simpsoni and Nemolestes brasiliensis. This article presents new fossil evidence of Nemolestes brasiliensis and assigns it to a new genus, Silvenator. Phylogenetic analysis suggests that Silvenator is closely related to the thylacinid Badjcinus and, to a lesser extent, Allqokirus. This study further supports the hypothesis that the Itaborai fauna only contains early lineages of sparassodonts.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Multidisciplinary Sciences
Edison Vicente Oliveira, Leonardo M. Carneiro, Francisco J. Goin
Summary: A new small-sized metatherian from the early Eocene period has been discovered in Brazil, showing primitive features and likely having an insectivorous diet.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2021)
Article
Paleontology
Mercedes Fernandez, Ana N. Zimicz, Mariano Bond, Laura Chornogubsky, Michelle Arnal, Magali Cardenas, Juan C. Fernicola
Summary: The Quebrada de Los Colorados Formation in Northwestern Argentina has recently revealed a new faunistic assemblage of South American native ungulates, increasing the taxonomic richness known for this formation. The presence of new species suggests a possible ungulate migration from Patagonia to Northwestern Argentina during the Eocene. The observed taxonomic differences among different formations in Northwestern Argentina may be related to orogenic factors rather than sampling biases.
ACTA PALAEONTOLOGICA POLONICA
(2021)
Article
Geosciences, Multidisciplinary
Ana Natalia Zimicz, Mercedes Fernandez, Mariano Bond, Laura Chornogubsky, Michelle Arnal, Magali Cardenas, Juan Carlos Fernicola
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)