Article
Geology
Katrina Mayo, Ricardo L. Silva, Paul R. Durkin
Summary: This study refines the paleoenvironmental reconstructions of Late Cretaceous rivers through facies and facies associations analysis, meander-belt architecture characterization, and paleohydraulic parameter calculations. The results demonstrate that the meander-belt deposits of the Dinosaur Park Formation were deposited in a fluvial environment upstream of the fluvial-marine transition zone, changing our understanding of the paleogeography of the Western Interior Seaway in western Canada. This study contributes to the validation and development of a systematic approach to the paleoenvironmental reconstruction of ancient river systems based on paleohydraulic analysis.
SEDIMENTARY GEOLOGY
(2023)
Article
Multidisciplinary Sciences
Stephen F. Poropat, Matt A. White, Tim Ziegler, Adele H. Pentland, Samantha L. Rigby, Ruairidh J. Duncan, Trish Sloan, David A. Elliott
Summary: The Snake Creek Tracksite in the Upper Cretaceous Winton Formation of Queensland, Australia, presents an important vertebrate ichnoassemblage, including the first sauropod tracks reported from eastern Australia. This site also preserves a small number of theropod and ornithopod tracks, as well as the first fossilised crocodyliform and possible turtle tracks reported from Australia.
Article
Multidisciplinary Sciences
Ross N. Mitchell, Christopher J. Thissen, David A. D. Evans, Sarah P. Slotznick, Rodolfo Coccioni, Toshitsugu Yamazaki, Joseph L. Kirschvink
Summary: A new high-resolution paleomagnetic record from two overlapping stratigraphic sections in Italy provides evidence for a 12-degree true polar wander oscillation from 86 to 78 million years ago, with the greatest excursion at 84-82 million years ago. This challenges the notion of the spin axis being largely stable over the past 100 million years and represents the most recent large-scale TPW documented.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Romain Vullo, Eberhard Frey, Christina Ifrim, Margarito A. Gonzalez Gonzalez, Eva S. Stinnesbeck, Wolfgang Stinnesbeck
Summary: The newly described Aquilolamna is a bizarre probable planktivorous shark from early Late Cretaceous open marine deposits in Mexico that shows an unexpected evolutionary experimentation with underwater flight among sharks. This long-winged shark with unique body plan belongs to a newly described group (Aquilolamnidae) and may have occupied the ecological niche filled by mobulids and other batoids after the Cretaceous-Paleogene boundary.
Article
Geology
Liubov Bragina, Nikita Bragin, Efthymios Tsiolakis, Vasilis Symeou, Nikolaos Papadimitriou, Polina Proshina
Summary: The Perapedhi Formation in the Akamas Peninsula of Cyprus contains well-preserved Upper Cretaceous radiolarian assemblage, indicating a possible reconsideration of its previous Campanian age conclusion. The age of the basal horizons of the Perapedhi Formation can vary significantly, showing a diachronous character of the lower boundary of the formation.
CRETACEOUS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Nisar Ahmed, Numair A. Siddiqui, Abdul H. B. A. Rahman, Muhammad Jamil, Muhammad Usman, Zulqarnain Sajid, Faisal Kamal Zaidi
Summary: The Belaga Formation in Sarawak is interpreted as a submarine fan model deposited in the proto-South China Sea basin, consisting of sandstone, siltstone, mudstone, and black shale. Comprehensive studies on the shales in this region have not been conducted to interpret their significance as a potential source rock for oil and gas fields.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2021)
Article
Multidisciplinary Sciences
Gregory F. Funston, Philip J. Currie, Chinzorig Tsogtbaatar, Tsogtbaatar Khishigjav
Summary: The Nemegt Formation in the Gobi Desert of Mongolia has produced abundant and diverse oviraptorosaur fossils, including two species of caenagnathid: Elmisaurus rarus and Nomingia gobiensis. However, recent research suggests that these two taxa may actually represent the same animal. The low diversity of caenagnathids in the Nemegt Formation may be related to competition with other oviraptorosaur families, particularly oviraptorids.
Article
Biology
Nicolas R. Chimento, Federico L. L. Agnolin, Makoto Manabe, Takanobu Tsuihiji, Thomas H. H. Rich, Patricia Vickers-Rich, Fernando E. E. Novas
Summary: A tooth from the Late Cretaceous in Argentina suggests the presence of monotremes in South America at the end of the Mesozoic Era. Monotremata, a group of egg-laying mammals represented by the platypus and echidnas, is endemic to Australia and nearby islands. The discovery of a Late Cretaceous monotreme in southern Argentina indicates their presence in circumpolar regions and suggests that their distinctive anatomical features were already present in ancient forms.
COMMUNICATIONS BIOLOGY
(2023)
Article
Plant Sciences
Seyed Habib Shojaei, Khodadad Mostafavi, Ali Omrani, Arpad Illes, Csaba Bojtor, Saeed Omrani, Seyed Mohammad Nasir Mousavi, Janos Nagy
Summary: This study aimed to identify drought-tolerant genotypes of maize and compare their response under normal and humidity stress conditions. Through graphical analysis and evaluation of multiple indices, the study identified desirable genotypes such as KSC704 and KSC260. The findings contribute to the breeding of drought-tolerant maize varieties.
Article
Multidisciplinary Sciences
S. Augusta Maccracken, Ian M. Miller, Kirk R. Johnson, Joseph M. Sertich, Conrad C. Labandeira
Summary: The Kaiparowits Formation in southern Utah, USA, preserves diverse plant, invertebrate, and vertebrate fossils, indicating a high biodiversity. Researchers discovered a new fossil leaf taxon called Catula gettyi in this formation and found extensive feeding damage caused by herbivorous insects on it.
Article
Energy & Fuels
Tim A. Moore, Shifeng Dai, Carme Huguet, Jillian Pearse, Jingjing Liu, Joan S. Esterle, Rongkun Jia
Summary: This study conducted petrographic, geochemical, and carbon isotopic determinations on coal samples from the Late Cretaceous-Paleocene Guaduas Formation in Colombia. The results revealed the characteristics and influences of the depositional environment and climate on the formation.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
F. Agosta, C. Manniello, F. Cavalcante, C. Belviso, G. Prosser
Summary: This study focused on the structural setting of a small area of the Murge Plateau in southern Italy, documenting the influence of Late Cretaceous transtensional faulting on the geological features through field geological and structural mapping, as well as mineralogical and petrographic investigations of rock samples. The results indicate a few km-long transtensional fault system formed by high-angle faults and dilational fissures, leading to the development of karst-related features. The study suggests that the Late Cretaceous transtensional faulting on the Apulian Platform was likely associated with orogenic processes involving the northern edge of the Adriatic micro-plate.
MARINE AND PETROLEUM GEOLOGY
(2021)
Review
Geosciences, Multidisciplinary
Lydian M. Boschman
Summary: The Andes, the longest continental mountain range on Earth, started forming in the Late Cretaceous with highly diachronous uplift in different regions. Reconstructing the timing of surface uplift is crucial for understanding continental-scale moisture transport, the origin and evolution of the Amazon River and Rainforest, and the coevolution of solid Earth, landscapes, climate, and life in South America.
EARTH-SCIENCE REVIEWS
(2021)
Article
Biology
Hebert Bruno Nascimento Campos
Summary: The newly described Javelinadactylus sagebieli represents a new species of tapejarid pterosaur from the Maastrichtian of North America, belonging to the Thalassodrominae subfamily. This discovery indicates that tapejarids were still diversifying in the Late Cretaceous period.
Article
Mathematics
Ivan E. Villalon-Turrubiates, Rogelio Lopez-Herrera, Jorge L. Garcia-Alcaraz, Jose R. Diaz-Reza, Arturo Soto-Cabral, Ivan Gonzalez-Lazalde, Gerardo Grijalva-Avila, Jose L. Rodriguez-Alvarez
Summary: The article introduces an evaluation method based on fuzzy process capability indices, which improves accuracy through modeling and experimental design. The proposed method provides a better overview of process performance, showing its potential, and is considered non-invasive.
Article
Geology
Rodrigo A. Otero
CRETACEOUS RESEARCH
(2019)
Article
Multidisciplinary Sciences
Rodrigo A. Otero
Article
Geology
J. P. O'Gorman, S. Santillana, R. Otero, M. Reguero
CRETACEOUS RESEARCH
(2019)
Article
Geology
Paulina Jimenez-Huidobro, Rodrigo A. Otero, Sergio Soto-Acuna, Michael W. Caldwell
CRETACEOUS RESEARCH
(2019)
Article
Geosciences, Multidisciplinary
Rodrigo A. Otero, Patricio Sepulveda
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Paleontology
Rodrigo A. Otero, Jhonatan Alarcon-Munoz, Sergio Soto-Acuna, Jennyfer Rojas, Osvaldo Rojas, Hector Ortiz
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2020)
Article
Multidisciplinary Sciences
Lucas J. Legendre, David Rubilar-Rogers, Grace M. Musser, Sarah N. Davis, Rodrigo A. Otero, Alexander O. Vargas, Julia A. Clarke
Article
Geosciences, Multidisciplinary
Rodrigo A. Otero, Sergio Soto-Acuna, Jennyfer Rojas, Osvaldo M. Rojas
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geology
Rodrigo A. Otero, Sergio Soto-Acun
Summary: A partial postcranial skeleton of an elasmosaurid plesiosaur recovered from central Chile is described as a new aristonectine, being the second representative of this clade known in the southeastern Pacific during the late Maastrichtian. This new taxon is recovered as a basal aristonectine in phylogenetic analysis, possessing unique morphology intermediate between non-aristonectine Weddellian elasmosaurids and aristonectines.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Rodrigo A. Otero
Summary: This research describes an isolated terminal caudal centrum of a mosasaur found in central Chile, which belongs to the Mosasaurinae and extends the local mosasaur diversity previously composed of tylosaurines and halisaurines. It also confirms the widespread distribution of mosasaurines in the Weddellian region prior to the K/Pg event.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Rodrigo A. Otero, Mario E. Suarez
Summary: This study presents new material of ray-finned fishes from Upper Cretaceous strata in central Chile, including specimens of the genus Enchodus and teeth of Pachyrhizodus and indeterminate pachycormids. It provides a critical review of historical ray-finned fishes in the region and suggests that the latest Cretaceous actinopterygian diversity along the southeastern Pacific was more discrete and scarce than previously thought.
CRETACEOUS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Rodrigo A. Otero
Summary: This contribution presents novel records of ray-finned fishes from the Oxfordian of Cerritos Bayos, northern Chile, including new diversity of Pachycormiformes and the first Upper Jurassic local record of a Lepisosteidae. These new records expand the known actinopterygian diversity from the Upper Jurassic of southeastern Panthalassa.
Article
Geosciences, Multidisciplinary
Rodrigo A. Otero, David Rubilar-Rogers, Sergio Soto-Acuna, Alexander M. Vargas, Gonzalo Mella Rojas, Raul Ugalde, Osvaldo Rojas, Jennyfer Rojas, Fernando E. Novas
Summary: This contribution reveals new vertebrate remains found in Triassic strata in the Atacama Desert, northern Chile. These include the first temnospondyl record in the El Bordo Basin, as well as actinopterygians related to Pseudobeaconiidae and a ray-finned fish with uncertain classification, Guaymayenia paramillensis. The findings suggest a Middle-to-Upper Triassic age for the Estratos El Bordo unit, providing insights into the paleoenvironment of southwestern South America during this time.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Paleontology
Rodrigo A. Otero, Constanza Figueroa Bravo, Paula Soto-Huenchuman, Sara Fernandez-Collemann, Ana M. Valenzuela-Toro, Carolina S. Gutstein
Summary: This study presents two specimens of Chimaeriformes from Upper Jurassic strata of central Chile, marking the oldest known Chimaeriformes in the Southern Hemisphere to date. One fossil is attributed to Ischyodus townsendi, and the other is Ischyodus sp., suggesting faunal interchange between the northern Tethys and the southeastern Pacific during the Late Jurassic.
ACTA PALAEONTOLOGICA POLONICA
(2021)
Article
Paleontology
Jose P. O'Gorman, Rodrigo A. Otero, Norton Hiller, Robin F. O'Keefe, R. Paul Scofield, Ewan Fordyce
Summary: The holotype specimen of Alexandronectes zealandiensis was analyzed using digital reconstruction based on CT scans, revealing unique features such as the shape of the ectopterygoid and high dorsal crest of the pterygoid. Additional details of the internal anatomy were described, including the presence of a stapes and the description of the inner ear labyrinth and floccular recess for the first time among elasmosaurids. These findings provide insights into the adaptive mechanisms of elasmosaurids, particularly related to their long necks and predatory behavior.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2021)
Article
Geology
Jimmy de Rooij, Sybrand A. N. Lucassen, Charlotte Furer, Anne S. Schulp, P. Martin Sander
Summary: This study presents a detailed osteohistological analysis on Triceratops horridus and Triceratops cf. prorsus specimens, aiming to understand the growth and development of ceratopsids. The analysis reveals a distinct pattern of bone tissue growth in Triceratops limb elements, but also suggests that taxonomic ambiguity between Torosaurus and Triceratops cannot be solely resolved based on histological data.
CRETACEOUS RESEARCH
(2024)
Review
Geology
J. R. Ovando-Figueroa, J. A. Moreno-Bedmar, M. Company, J. A. Jacobo-Delgado
Summary: This article presents a review of ammonoid specimens from the Berriasian and Valanginian age in Zacatecas, Mexico. The study includes updated museographic information, new images, and 3D models of the specimens. Taxonomic identification has revealed six species and two genera. Stratigraphic range data suggests that the specimens belong to the uppermost upper Berriasian to lower Valanginian interval, with several biozones identified. Additionally, a paleobiogeographic analysis indicates a clear affinity with contemporaneous ammonoid assemblages from the Mediterranean region.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Jake Kotevski, Ruairidh J. Duncan, Adele H. Pentland, James P. Rule, Patricia Vickers-Rich, Thomas H. Rich, Erich M. G. Fitzgerald, Alistair R. Evans, Stephen F. Poropat
Summary: The cranial remains of non-avian theropod dinosaurs from the Cretaceous period in Australia are poorly understood. This study presents new evidence of non-mandibular cranial material, possibly belonging to the Megaraptoridae family, and contributes to the limited knowledge of Australian Cretaceous theropod cranial remains.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Josh Jenkins Shaw, Alexey Solodovnikov, Evgeny E. Perkovsky
Summary: A fossil of the monogeneric rove beetle subfamily Trichophyinae (genus Trichophya) has been discovered in the Upper Cretaceous Taimyr amber from northern Siberia. This finding indicates the morphological differences between ancient and modern Trichophya species groups. By comparing the morphology, distribution, and habitat requirements of extant species, the taxonomy, biogeography, and paleoecology of the Trichophya in Taimyr amber can be better understood.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Martin Kostak, Frank Wiese, Zuzana Kozlova, Adam Culka, Martin Mazuch, Martin Soucek
Summary: A well-preserved fossil of an upper Cretaceous acanthoceratoid ammonite has been discovered in the Bohemian Cretaceous Basin, providing important insights into the jaw anatomy of these extinct organisms.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler
Summary: The Santa Marta Formation in the Antarctic Peninsula is an important sedimentary sequence that provides insights into paleoenvironmental changes. The distribution of sedimentary organic matter reveals three distinct palynofacies associations and shows a progressive transgression from terrestrial to marine environments.
CRETACEOUS RESEARCH
(2024)
Article
Geology
B. J. Vazquez, D. Castanera, B. Vila
Summary: In Europe, the fossil record of sauropods in the uppermost Cretaceous is mainly found in Spain, France, and Romania. Recently, a significant discovery of titanosaurs' teeth was made in Els Nerets, Spain, which contains the largest tooth sample from the Late Cretaceous in Europe. The teeth show distinct characteristics but cannot be attributed to any known European species. Based on tooth morphology and wear facets distribution, a new taxon is proposed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Youssef S. Bazeen, Walid G. Kassab, El Sayed M. Moneer, Gebely A. Abu El-Kheir, Mohamed K. Abdelgawad, Haitham M. Ayyad
Summary: This study investigates the Maastrichtian-Danian succession in the Abu Minqar section of the Western Desert of Egypt, using an integrated analysis of biostratigraphy and chemostratigraphy. The results suggest that regional tectonics played a substantial role in the depositional history and paleoenvironmental circumstances of the southern Tethys margin.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Fernando R. Rios, Ana M. P. Mizusaki, Rualdo Menegat, Isaque C. Rodrigues
Summary: This study examines the temporal and spatial relationships between fluvio-aeolian, aeolian, and volcanic systems in the southernmost part of the Parana Basin during the Late Jurassic and Early Cretaceous. By analyzing facies and architectural elements, the evolution of the volcano-sedimentary record is reconstructed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Antonio M. Casas, Arsenio Munoz, Alberto Tella, Carlos L. Liesa
Summary: This work proposes the application of magnetic surveying to study the cyclicity in sedimentary basins. Through measuring the total magnetic field and vertical magnetic gradient, the short-wavelength magnetic anomalies associated with the sedimentary sequence can be analyzed, providing information about the magnetic susceptibility and magnetic remanence of different sedimentary units. The cyclostratigraphic analysis reveals the existence of various cycles and enables the dating of the basin fill, offering new constraints for basin evolution.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Felix Schlagintweit, David Gercar, Bostjan Rozic
Summary: A mixed assemblage of planktonic and benthonic foraminifera has been found in the Lower Flyschoid Formation in the western part of the Slovenian Basin. These findings provide valuable insights into the biostratigraphy and paleogeographic configuration of the region during the Early to Middle Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Arkaprava Mukhopadhyay, Debarati Chattopadhyay, Arghya Poddar, Ranita Saha, Sachin Patil, Tushar Sonkar, Sujoy Das, Rudranil Basak, Shubhabrata Paul, Arindam Roy
Summary: Predator-prey interaction exerts significant selection pressure on the evolutionary pathways of both parties. This research presents a new dataset of gastropod drilling predation on molluscan prey from the Upper Cretaceous, highlighting the influence of drilling predation during this period. The study utilizes a hybrid method of surface sampling without physically breaking the host rock. Findings suggest that drilling predation was an established form of predation during the Late Cretaceous, yet remains understudied.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Dany Azar, Andre Nel
Summary: Lebanoaktassia curiosa is a new genus and species of strange dragonfly, representing the first Gondwanan species of the family Aktassiidae. It was found in Hjoula, Lebanon, along with two endemic dragonfly families, suggesting a possible connection to an island insular system in the Early Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Pablo M. Villegas, A. Martin Umazano, Marcelo Krause, Mariana Brea
Summary: Conifer fossil woods from the Campanian Puntudo Chico Formation were studied, confirming the presence of Brachyoxylon currumillii and the introduction of Cupressinoxylon sp. cf. C. artabeae in the formation. The new specimens of Podocarpoxylon mazzonii suggest that this taxon is common in the Cretaceous to Eocene floristic assemblages. The growth-ring analysis of these fossil trees indicates their development under temperate and humid conditions, with slight sensitivity from year to year and a terminal event representing a cessation or retardation of cambial activity. Other paleoclimatic proxies suggest a temperate-warm and humid depositional environment with some semi-arid events in the Puntudo Chico Formation.
CRETACEOUS RESEARCH
(2024)