Article
Geology
Mercedes Barros, Cecilia Pavon Pivetta, Daniel A. A. Gregori, Leonardo Benedini, Leonardo Strazzere, Mauro C. C. Geraldes, Paulo Marcos
Summary: The Comallo volcanic sedimentary Complex in the western North Patagonian Region is formed by the development and collapse of Plinian-type eruptive columns of rhyolitic and dacitic composition. The synchronous deposits are found in alluvial and lagoon environments. The derived zircon grains indicate the possibility of melting Paleoproterozoic and Mesoproterozoic crust. Basaltic and andesitic lava flows and pyroclastic deposits appear in the upward sequence, which are related to sustained pyroclastic fountains with a U-Pb zircon age of 185 Ma. The volcanic rocks are possibly derived from Paleoproterozoic, Mesoproterozoic, and Neoproterozoic crust affected by juvenile magmas in volcanic-arc environments. Chemical and isotopic variations are mainly caused by changes in the local and regional tectonic conditions, the thickness of the continental crust, as well as the dip and age of the subducted oceanic crust.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Plant Sciences
Cristina I. Nunes, Juan L. Garcia Massini, Ignacio H. Escapa, Diego M. Guido, Kathleen A. Campbell
Summary: This study describes new specimens of sooty molds associated with conifer leaves from Jurassic hot spring deposits in Patagonia, Argentina. Through light microscopy observations, it was found that these fungi grow on twigs with podocarpaceous affinities, forming dense subicula. Additional research revealed various asexual and sexual reproductive structures present in these specimens.
AMERICAN JOURNAL OF BOTANY
(2021)
Article
Paleontology
Javier Echevarria, Susana E. Damborenea, Miguel O. Mancenido
Summary: This study describes 20 species of Trigoniida in the Early Jurassic shallow-marine paleoenvironments of the Andes, including some new species and genera, revealing their stratigraphic range and evolutionary relationships. These fossils indicate variation and evolution among species, as well as evidence of the rapid recovery of Trigoniida species in the Early Jurassic.
JOURNAL OF PALEONTOLOGY
(2021)
Article
Biochemistry & Molecular Biology
David E. Berthold, Forrest W. Lefler, H. Dail Laughinghouse
Summary: The study identified three new genera and four new species of marine cyanobacteria in the coastal ecosystems of South Florida, characterized by discoid cells, homocytous unbranched filaments, and discoid apical cells.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2021)
Article
Plant Sciences
Naresh Kumar, Aniket Saraf, Sagarika Pal, Deeksha Mishra, Prashant Singh, Jeffrey R. R. Johansen
Summary: This passage discusses the isolation and characterization of three novel strains in the Calotrichaceae family from tropical habitats. The strains were studied for their morphology, phylogenetic placement, and secondary structures of conserved domains in the 16S-23S ITS. Two clades were identified, with the first clade named Fulbrightiella and consisting of two species, F. bharadwajae and F. oahuensis. The second clade was named Sherwoodiella and consisted of a single species, Sherwoodiella mauiensis. The finding and sequencing of the generitype for Calothrix remains an important and unfinished task in revising the Calotrichaceae.
JOURNAL OF PHYCOLOGY
(2023)
Article
Biology
Xi Yao, Paul M. Barrett, Lei Yang, Xing Xu, Shundong Bi
Summary: This study describes a new taxon of early armored dinosaurs from the Lower Jurassic Fengjiahe Formation of Yunnan Province, China. The taxon is distinguished by numerous unique cranial and postcranial features, and phylogenetic analysis suggests it may be closely related to Emausaurus or the clade Scelidosaurus+ Eurypoda. This discovery confirms the rapid geographic spread and diversification of thyreophorans after their first appearance in the Early Jurassic, and reveals previously unrealized morphological diversity.
Article
Entomology
Jindrich Rohacek, Kevin N. Barber
Summary: This study redefines, redescribes, and discusses the relationships of the New World genus Mumetopia Melander, 1913. The Nearctic type species, M. occipitalis Melander, 1913, is revised with detailed description and illustrations, and its relationship, biology, and distribution are studied using published and new data. A new genus, Xerocomyza gen. n., is described for an unusual species, X. hansoni sp. n., from high desert plains in Utah, USA, and its phylogenetic relationships are discussed, suggesting that Xerocomyza is a distinct lineage within Anthomyzidae possibly related to the Carexomyza + Chamae-bosca group clade (Barber & Rohacek, 2020, Arthropod Syst. Phylogeny 78: 69-109). Limited label data from type specimens are used to provide information on the biology and distribution of X. hansoni.
EUROPEAN JOURNAL OF ENTOMOLOGY
(2023)
Article
Multidisciplinary Sciences
Natsumi Kanzaki, Yuya Ikeda, Ryoji Shinya
Summary: A diplogastrid nematode was discovered on a dung beetle in Kyoto, Japan. This species, named Onthodiplogaster japonica n. gen., n. sp., has unique characteristics such as a cheilostomatal shape, deep stegostom, large ellipsoidal amphids, conical female tail, and a specific receptaculum seminis. It is distinct from other diplogastrid genera like Neodiplogaster and Mononchoides in terms of size and shape of the amphid, female tail shape, and presence of receptaculum seminis. The observation of its feeding behavior indicates that O. japonica n. gen., n. sp. exhibits monomorphic omnivory by feeding on nematodes, fungi, and bacteria in its habitat of dung and rotten materials.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Natalia M. Hernandez, Antonella Galetto, Ernesto O. Cristallini, Victor H. Garcia, Florencia Bechis, Laura B. Giambiagi
Summary: The Chachil depocenter located in the Andean foreland is characterized by NNW and NE-striking normal faults controlling its extensional architecture. The rift structure is related to the reactivation of Paleozoic discrete basement anisotropies, with local ENE extension possibly resulting from the refraction of the regional NNE to NE-oriented extension further north in the basin.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Microbiology
Mi-Jeong Park, Yun Jae Kim, Myeongkyu Park, Jihyun Yu, Teddy Namirimu, Yoo-Rim Roh, Kae Kyoung Kwon
Summary: In this study, genome-based criteria for classification of the Desulfovibrionaceae family were established and validated. Using the average amino-acid identity (AAI) cut-off value, 88 genomes were divided into 27 genera, resulting in the proposal of two new genera and one former invalid genus. Furthermore, using average nucleotide identity (ANI) and digital DNA-DNA hybridization standards, it was found that five strains have the potential to be classified as new species. Analysis of relative synonymous codon usage and metal resistance related genes confirmed common characteristics and metal tolerance among the strains.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Paleontology
Patrick Branger
Summary: A new genus, Micronautilus, is described and assigned to the family Paracenoceratidae. It consists of two species with very small shells, and is considered to be a natural lineage within the family. Micronautilus is currently known to be limited to the Bathonian of Western France. Its origin is likely to be linked to a group of nautilids assigned to 'Cenoceras' fuscum. Paleo-environmental data suggest that the dwarfism of this genus is not a result of isolated population or specific environmental conditions.
COMPTES RENDUS PALEVOL
(2023)
Article
Microbiology
Stanislava Kralova, Lenka Davidova-Gerzova, Adam Valcek, Matej Bezdicek, Ivan Rychlik, Veronika Rezacova, Alois Cizek
Summary: This study analyzed three difficult-to-cultivate and strictly anaerobic strains and proposed classifying them into two new genera.
MICROBIOLOGY SPECTRUM
(2022)
Article
Evolutionary Biology
Yegor Shishkin Skaro, Daria Drachko, Vasily V. V. Zlatogursky
Summary: A new family, genus and species of centrohelid heliozoans, Ricksol blepharistes gen. n., sp. n., was studied using microscopy and gene sequencing. This species has two types of siliceous scales, including a unique external scale type. Molecular analysis placed R. blepharistes in the Panacanthocystida group, distinct from any known families. This study also discussed the morphological similarities with related genera and the possible origins of the genus Acanthocystis.
ORGANISMS DIVERSITY & EVOLUTION
(2023)
Article
Multidisciplinary Sciences
Andrea Villa, Roel Montie, Martin Roeper, Monika Rothgaenger, Oliver W. M. Rauhut
Summary: The new taxon Sphenofontis from the Solnhofen Archipelago adds to the diversity of rhynchocephalians, showing significant differences from other Jurassic species and closer resemblance to the extant Sphenodon.
Article
Geography, Physical
E. Schwarz, M. Poyatos-More, S. Boya, L. Gomis-Cartesio, I Midtkandal
Summary: This study investigates a thick, bioturbated succession deposited during the early post-rift stage in the Neuquen Basin, Argentina, and compares it with global examples to discuss factors controlling the overprint of storm-event beds over several million years. The research shows that the sedimentation of these deposits is mainly controlled by bioturbation and long-term aggradational patterns, providing important insights for understanding depositional models and facies distribution in storm-influenced systems.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Evolutionary Biology
Mariel Ferrari, Andrzej Kaim
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2019)
Article
Paleontology
Susana E. Damborenea
JOURNAL OF PALEONTOLOGY
(2019)
Article
Geochemistry & Geophysics
Michal Jakubowicz, Jolanta Dopieralska, Andrzej Kaim, Petr Skupien, Steffen Kiel, Zdzislaw Belka
Article
Paleontology
Susana E. Damborenea, Maria Alejandra Pagani
JOURNAL OF PALEONTOLOGY
(2019)
Article
Geography, Physical
Sonia Ros-Franch, Javier Echevarria, Susana E. Damborenea, Miguel O. Mancenido, Hugh C. Jenkyns, Aisha Al-Suwaidi, Stephen P. Hesselbo, Alberto C. Riccardi
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Review
Geosciences, Multidisciplinary
M. Ruhl, S. P. Hesselbo, A. Al-Suwaidi, H. C. Jenkyns, S. E. Damborenea, M. O. Mancenido, M. Storm, T. A. Mather, A. C. Riccardi
EARTH-SCIENCE REVIEWS
(2020)
Article
Geosciences, Multidisciplinary
Krzysztof Hryniewicz, Yusuke Miyajima, Kazutaka Amano, Magdalena N. Georgieva, Michal Jakubowicz, Robert G. Jenkins, Andrzej Kaim
Summary: The studied seep carbonates from Tsushima, Japan, represent the earliest evidence of hydrocarbon seepage in the Sea of Japan, forming within a pull-apart basin before major anticlines had formed. The carbonates are primarily composed of calcite, with significant admixture of ankerite at Kanoura, and isotopic analysis indicates methanogenic origin.
GEOLOGICAL MAGAZINE
(2021)
Article
Geography, Physical
Krzysztof Hryniewicz, Sofia Bakayeva, Larysa Heneralova, Oleh Hnylko, Robert G. Jenkins, Andrzej Kaim
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Paleontology
Javier Echevarria, Susana E. Damborenea, Miguel O. Mancenido
Summary: This study describes 20 species of Trigoniida in the Early Jurassic shallow-marine paleoenvironments of the Andes, including some new species and genera, revealing their stratigraphic range and evolutionary relationships. These fossils indicate variation and evolution among species, as well as evidence of the rapid recovery of Trigoniida species in the Early Jurassic.
JOURNAL OF PALEONTOLOGY
(2021)
Article
Paleontology
Andrzej Kaim, Crispin T. S. Little, William J. Kennedy, Ellen M. Mears, Louise M. Anderson
Summary: Modern hydrothermal vent communities are supported by microbial primary producers, with many dominant taxa emerging during the Cenozoic and Cretaceous periods. Fossil records of vent communities from these time periods are scarce. A discovery of Cretaceous vent communities in Cyprus reveals a diversity of new species in gastropods, with shared tube worms among vent sites in the western Neotethyan Ocean.
PAPERS IN PALAEONTOLOGY
(2021)
Article
Multidisciplinary Sciences
Aisha H. Al-Suwaidi, Micha Ruhl, Hugh C. Jenkyns, Susana E. Damborenea, Miguel O. Mancenido, Daniel J. Condon, Gladys N. Angelozzi, Sandra L. Kamo, Marisa Storm, Alberto C. Riccardi, Stephen P. Hesselbo
Summary: The Pliensbachian-Toarcian boundary interval is characterized by a significant negative carbon-isotope excursion (CIE) in various marine and terrestrial archives, indicating a global disturbance to the carbon cycle. A new high-resolution organic-carbon isotope record from the Arroyo Chacay Melehue section in Argentina confirms the global significance of this anomaly. It also provides precise age assignments for the boundary and zonal boundaries using U-Pb zircon geochronology and a Bayesian Markov chain Monte Carlo (MCMC) stratigraphic age model.
SCIENTIFIC REPORTS
(2022)
Article
Paleontology
Maciej K. Pindakiewicz, Krzysztof Hryniewicz, Katarzyna Janiszewska, Andrzej Kaim
Summary: This study reports the discovery of the first cephalopod statoliths from the Early Cretaceous, filling the gap in the fossil record between Jurassic and Cenozoic forms. The statoliths show a closer resemblance to the Recent Idiosepiidae and are suggested to belong to the basal decabrachians. The robustly developed spur in the Mesozoic statoliths may play a similar role to the wing in Cenozoic and Recent decabrachians. The abundance ratio of statoliths vs fish otoliths also supports a Cretaceous turnover in marine organisms.
COMPTES RENDUS PALEVOL
(2022)
Article
Geochemistry & Geophysics
M. Jakubowicz, L. M. Agirrezabala, J. Dopieralska, M. Siepak, A. Kaim, Z. Belka
Summary: Studies on the involvement of intrusive magmatism in hydrocarbon generation within sedimentary basins have gained momentum due to the increasing appraisal of their role in controlling global carbon cycle perturbations and the exploration potential of volcanic sedimentary basins. A multi-proxy geochemical study in the Basque-Cantabrian Basin during the middle Cretaceous revealed radiogenic Nd isotope signals in methane-seep deposits, indicating a connection between hydrocarbon seepage and igneous activity, and demonstrating the potential of Nd isotopes in tracing magmatic-influenced fluids in volcanic sedimentary basins.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Ecology
Thomas Mors, Jonas Hagstrom, Andrzej Kaim, Krzysztof Hryniewicz
POLISH POLAR RESEARCH
(2019)
Article
Paleontology
Krzysztof Hryniewicz, Kazutaka Amano, Maria Aleksandra Bitner, Jonas Hagstrom, Steffen Kiel, Adiel A. Klompmaker, Thomas Mors, Cristina M. Robins, Andrzej Kaim
ACTA PALAEONTOLOGICA POLONICA
(2019)