Article
Geology
Thiago S. Marinho, Agustin G. Martinelli, Giorgio Basilici, Marcus Vinicius T. Soares, Andre Marconato, Luiz C. B. Ribeiro, Fabiano Iori
Summary: Notosuchians are a diverse group found in rocks of the Upper Cretaceous Bauru Group in southeastern Brazil, occupying various terrestrial ecological niches. The Uberaba Formation is one of the most prolific Upper Cretaceous units in Brazil, with the discovery of a new taxon, Eptalofosuchus viridi, and other notosuchian remains.
CRETACEOUS RESEARCH
(2022)
Article
Geology
Gustavo Darlim, Ismar de Souza Carvalho, Sandra Aparecida Simionato Tavares, Max Cardoso Langer
Summary: Baurusuchidae is a diverse group of notosuchians, with members from Upper Cretaceous deposits in Brazil and Argentina. Recent studies challenge the proposed chronostratigraphic separation between different geographic locations of baurusuchids, suggesting they may have coexisted at approximately the same time.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Carolina Klock, Lea Leuzinger, Rodrigo Miloni Santucci, Agustin G. Martinelli, Andre Marconato, Thiago S. Marinho, Zoneibe Luz, Torsten Vennemann
Summary: Notosuchia, a diverse group of crocodyliforms from the Cretaceous period, showed variations in feeding habits in the Bauru Basin in Brazil. The climate in the Bauru Group during the Late Cretaceous was semi-arid to arid, based on stable isotope analysis.
CRETACEOUS RESEARCH
(2022)
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
Andre Eduardo P. Pinheiro, Lucy G. De Souza, Kamila L. N. Bandeira, Arthur S. Brum, Paulo Victor Luiz G. C. Pereira, Luis Otavio R. De Castro, Renato R. C. Ramos, Felipe M. Simbras
Summary: This study reports a new crocodyliform species, Coronelsuchus civali, from the Bauru Group in Brazil, expanding the understanding of the phylogeny and stratigraphic range of Sphagesauria. The discovery suggests an earlier appearance and diversification of Sphagesauria in the region.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2021)
Article
Anatomy & Morphology
Gustavo Darlim, Felipe C. Montefeltro, Max C. Langer
Summary: Baurusuchidae is a diverse group of South American notosuchians, known for their reduced tooth formula, compressed rostrum, and verticalized quadrate. A new baurusuchid species with distinct features has been described, highlighting its phylogenetic position within the group as sister to other baurusuchines. The study helps to distinguish between Baurusuchinae and Pissarrachampsinae lineages, suggesting variability in the radiation of Baurusuchidae.
JOURNAL OF ANATOMY
(2021)
Article
Geology
Gabriel Gonzalez Barbosa, Max Cardoso Langer, Neurides de Oliveira Martins, Felipe Chinaglia Montefeltro
Summary: This study applied Finite Element Analysis to investigate the functional morphology of the tooth and ungual phalanges of Vespersaurus paranaensis. Results suggest that the tooth was adapted for a 45-degree bite angle and not suited for struggling prey or harder food items. The analysis of the ungual phalanges indicates that they were similar in shape to those of living mammals with scansorial, fossorial, and terrestrial habits. Overall, this suggests that Ves. paranaensis had a generalist diet, hunting small vertebrates, invertebrates, or immobile prey.
CRETACEOUS RESEARCH
(2023)
Article
Geography, Physical
L. Delgado, A. Batezelli, F. S. B. Ladeira
Summary: The Cretaceous climate was characterized by arid and semiarid conditions around the world, with significant paleoclimatic reconstructions being developed in the Bauru Basin of Brazil due to the well-preserved sedimentary sequences and abundant fossil content. By studying the paleosols in the basin, researchers identified environmental and climatic patterns from the Lower to Upper Cretaceous, allowing for the elaboration of maps of paleoclimatic evolution that contribute to the understanding of Cretaceous paleoclimatic context in South America.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Gabriel Teofilo Guedes Silva, Diego Luciano Nascimento, Alessandro Batezelli, Francisco Sergio Bernardes Ladeira, Marcio Luiz Silva
Summary: Burrowing behavior is an important adaptation for animals in arid conditions. This paper describes turtle burrows from the Upper Cretaceous period in the Bauru Basin, Brazil. The burrows were preserved in fluvial sandstone and showed a J-shaped tunnel structure. Based on their morphology and features, it is suggested that these burrows were formed by turtles during aestivation.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Andrea Barrier, G. H. Browne, A. Nicol, Kari Bassett
Summary: The Canterbury Basin in southeastern Zealandia originated as a rift system during the late Albian, with basin-fill architecture controlled by normal faulting resulting in basin and range topography. Sediment types included alluvial fans, braided river conglomerates, coal measures, and lake deposits. Marine incursion began during rifting and Gondwana breakup, eventually being covered by detrital sediments and pelagic deposition by the Early Eocene.
Article
Geosciences, Multidisciplinary
Youliang Feng, Caineng Zou, Jianzhong Li, Changsong Lin, Hongjun Wang, Shu Jiang, Zhi Yang, Shun Zhang, Xiuli Fu
Summary: Research on sediment gravity-flow systems in the Songliao Basin is valuable for understanding sedimentary processes, patterns, and predicting the presence of good sandstone reservoirs. The study identified deep lake channel-levee-lobe and slope fan deposits within six depositional sequences spanning from the Turonian to early Coniacian upper part of the fourth member of the Quantou Formation to the early Campanian second member of the Nenjiang Formation.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Thomas Voigt, Jonas Kley, Silke Voigt
Summary: In the Late Cretaceous, a compressional tectonic event impacted central Europe, with the timing of this event still being debated. By reconstructing the timing of basin reorganization using borehole data and thickness maps, it was found that the start of inversion happened 5 million years earlier than previously assumed. The difficulty in pinpointing the end of the Late Cretaceous compressional event in central Europe is attributed to regional uplift and salt migration affecting the signal of shifting marginal troughs.
Article
Geosciences, Multidisciplinary
Juan Carvajal-Torres, Octavian Catuneanu, Andres Mora, Victor Caballero, Martin Reyes
Summary: This study reveals the geological evolution of the present-day Magdalena Valley, Eastern Cordillera, and Llanos Basin. It shows that these areas were part of a regional multiphase basin that went through extensional basin, retroarc foreland basin, and separation into a hinterland and a foreland basin stages.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Marcus Vinicius Theodoro Soares, Giorgio Basilici, Thiago da Silva Marinho, Agustin Guillermo Martinelli, Andre Marconato, Nigel Philip Mountney, Luca Colombera, Aquila Ferreira Mesquita, Julia Tucker Vasques, Francisco Romero Abrantes Junior, Luiz Carlos Borges Ribeiro
Summary: This study focuses on the northeastern deposits of the Marilia Formation in the Bauru Basin of SE Brazil, demonstrating significant differences from other regions and proposing a new lithostratigraphic classification as the Serra da Galga Formation. By analyzing lithofacies, palaeopedology, and sedimentary architecture, the study reveals unique characteristics of these deposits, distinguishing them from the rest of the Marilia Formation.
GEOLOGICAL JOURNAL
(2021)
Article
Geology
Tito Aureliano, Carolina S. I. Nascimento, Marcelo A. Fernandes, Fresia Ricardi-Branco, Aline M. Ghilardi
Summary: This research provides detailed histological descriptions of severe bone inflammation and the exceptional preservation of soft-bodied parasitical microorganisms in the vascular canals of a non-avian dinosaur for the first time, bringing new insights to parasitology, pathology, and histology. An old titanosaur from Southeast Brazil in the Upper Cretaceous exhibited acute osteomyelitis, with tens of parasites found in the specimen's vascular canals, indicating a potential association between parasitic infestation and infectious bone disease.
CRETACEOUS RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Maria Helena Paiva Henriques, Ismar de Souza Carvalho
Summary: Fossils are polysemic entities that attract people for different reasons. The integrity of the fossil record is crucial for the development of paleontology and the enrichment of the paleontological heritage. Cultural initiatives of geoconservation contribute to expanding the data on paleontological heritage, along with academic activities.
Article
Geosciences, Multidisciplinary
Caiubi Emanuel Souza Kuhn, Ismar de Souza Carvalho, Fabio Augusto Gomes Vieira Reis, Andre Luis Spisila, Marjorie Cseko Nolasco
Summary: Fossils in Brazil are considered a heritage of the union and can be seen as mineral heritage or cultural heritage depending on their relation to human culture. There is a lack of clear criteria for differentiating rare specimens from common occurrences, highlighting the need for new norms to preserve Brazilian fossil heritage. A new legal framework for mineral extraction is crucial to ensure better preservation and provide legal certainty for professionals and mining companies.
Article
Geology
Silverio D. Figueiredo, Pedro P. Cunha, Xabier Pereda Suberbiola, Carlos Neto de Carvalho, Ismar de Souza Carvalho, Eric Buffetaut, Haiyan Tong, Maria Fernanda Sousa, Vanessa Antunes, Rita Anastacio
Summary: This study describes a dinosaur tracksite in Portugal and identifies the footprints of different dinosaur species. The tracks provide insights into the behavior of the dinosaurs that inhabited the area.
CRETACEOUS RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Angela Cristine Scaramuzza dos Santos, Margot Guerra-Sommer, Isabela Degani-Schmidt, Anelise Marta Siegloch, Joalice de Oliveira Mendonca, Joao Graciano Mendonca Filho, Ismar de Souza Carvalho
Summary: This study examined a gelified wood fossil from the late Aptian period in the Macei 'o Formation in northeastern Brazil. The research analyzed the tissue structure and fungal remains, and provided insights into the distribution of the fossil-genus in South America and its climatic tolerance.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Article
Geology
Fabio Lamm, Francisco Henrique de Oliveira Lima, Cleber Fernandes Alves, Ismar de Souza Carvalho
Summary: The biostratigraphy of the Aptian-Albian interval using calcareous nannofossils has been continuously developed and applied. However, the scarcity of complete marine sections and taxonomic ambiguities pose challenges in stratigraphic studies of this interval. The Poggio le Guaine section in central Italy offers a unique opportunity with a complete and undisturbed sedimentary succession of the Aptian-Albian interval. This study aims to provide a detailed biostratigraphic zonation, calibrate it with previous works, and discuss important bioevents.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Maria G. P. de Carvalho, John G. Maisey, Ighor Dienes Mendes, Ismar de Souza Carvalho
Summary: In this article, a scorpion fossil (Protoischnurus axelrodorum) from the Lower Cretaceous Crato Formation in northeastern Brazil is analyzed using computed microtomography. The taphonomy and morphology of the fossil are described and illustrated, and a revised diagnosis of the genus is presented. The phylogenetic relationships of this taxon are also discussed, placing Protoischnurus in the Scorpionoidea and suggesting its possible role as an early member of the Iurida crown group.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Daubian Santos, Ismar de Souza Carvalho, Guilherme Cunha Ribeiro
Summary: This study describes twelve new species of the genus Leptotarsus and provides an updated identification key for all Cretaceous Leptotarsus species worldwide.
CRETACEOUS RESEARCH
(2023)
Article
Biology
Andre Eduardo Piacentini Pinheiro, Paulo Victor Luiz Gomes Costa Pereira, Felipe Mesquita Vasconcellos, Arthur Souza Brum, Lucy Gomes De Souza, Fabiana Rodrigues Costa, Luis Otavio Rezende Castro, Kaue Fontes Da Silva, Kamila Luisa Nogueira Bandeira
Summary: Crocodyliformes from the Bauru Group in Brazil, including specimens of Itasuchidae, have been analysed and described. The morphological analysis revealed the similarity between these specimens and the species of Pepesuchus, Itasuchus cf. jesuinoi, and cf. Roxochampsa paulistanus. The phylogenetic and morphometric results confirmed the monophyly of Itasuchidae and suggested that South American itasuchid species occupied a distinctive morphospace among crocodyliforms. The Bauru Group represents a diversity peak of archosaurs in the Upper Cretaceous. Rating: 8/10.
HISTORICAL BIOLOGY
(2023)
Review
Biology
Silverio Domingues Figueiredo, Ismar de Souza Carvalho, Xabier Pereda Suberbiola, Pedro Proenca Cunha, Ioanna Bachtsevanidou Strantzali, Vanessa Antunes
Summary: This article describes the discovery of ornithopod remains in the Papo-Seco Formation in western central Portugal. These fossils extend the record of early Barremian ornithopods in the region and provide valuable insights into the evolutionary history of these dinosaurs.
HISTORICAL BIOLOGY
(2023)
Article
Multidisciplinary Sciences
Julian C. G. Silva Junior, Agustin G. Martinelli, Thiago S. Marinho, Joao Ismael da Silva, Max C. Langer
Summary: This study reveals that two previously known taxa are actually the same species based on new titanosaur specimens unearthed from a site in Uberaba, Brazil. Furthermore, it also identifies a new taxon from the same area that was previously thought to be a different species.
Article
Geology
Ismar de Souza Carvalho, Giuseppe Leonardi
Summary: Dinosaur tracks have been discovered in the Rio do Peixe basins in western Paraiba, Brazil, with a total of 39 individual tracksites. These tracks are found in 98 stratigraphic levels, and the Triunfo basin is one of the sub-basins in the area. So far, only a few footprints and trackways have been identified, belonging to theropods and ornithopods.
CRETACEOUS RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Isabela Degani-Schmidt, Margot Guerra-Sommer, Ismar de Souza Carvalho
Summary: This study is the first to estimate paleoatmospheric carbon dioxide concentration using stomatal numbers in the paleoequatorial late Aptian Crato Formation. Stomatal frequency and distribution in the plant Pseudofrenelopsis capillata were analyzed through scanning electron microscopy. The estimated paleoatmospheric pCO2 range was consistent with results from other latitudes in the Early Cretaceous and discussed in the context of the paleoenvironment.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Geology
Silverio Domingues Figueiredo, Carlos Marques, Isabel Morais Rosa, Pedro Proenca Cunha, Ismar de Souza Carvalho
Summary: Fossils of sauropods, including Titanosauriform sauropods, and other vertebrates have been found in the Papo-Seco Formation in Cabo Espichel, south of Lisbon, Portugal. These fossils were discovered in marls, sandstones, and conglomerates, which were deposited in lagoonal and estuarine environments under a tropical climate. The study of these fossils, including teeth and postcranial remains, provides insights into the ancient ecosystem.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Diogo Lins Batista, Ismar de Souza Carvalho, Marcelo S. de la Fuente
Summary: The paleoecology of Araripemys barretoi, a pelomedusoid turtle from the Lower Cretaceous of Brazil, was investigated. Analysis of forelimb proportions suggests that Araripemys barretoi had specialized morphology as an agile swimmer in large water bodies. Various postcranial anatomical features indicate that this species was adapted to different aquatic environments. Araripemys barretoi was abundant during the Aptian in the Araripe and Parnaiba basins, which were once an epicontinental sea related to the Equatorial Atlantic opening.
CRETACEOUS RESEARCH
(2023)
Article
Paleontology
Silvia Helena De Souza Arcanjo, Diogo Van Basten Aguiar De Sousa, Manuel Alfredo Medeiros, Rafael Matos Lindoso, Eliane Pinheiro De Sousa, Ismar De Souza Carvalho
Summary: This article demonstrates the impact of the Parnaiba River Lineament on the tectonics of the Parnaiba Basin through the discovery of a paleontological finding from the Cretaceous period near a Permian sequence. A normal fault in the NNE-SSW direction caused the subsidence of the Cretaceous Itapecuru Formation and the relative uplift of the Permian Pedra de Fogo Formation. The presence of a Mesozoic theropod tooth at the same level as a Paleozoic unit provides evidence of tectonic activity affecting the stratigraphic successions of the Parnaiba Basin.
REVISTA BRASILEIRA DE PALEONTOLOGIA
(2023)
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)