Article
Geography, Physical
Jorge F. Genise, Eduardo S. Bellosi, Liliana F. Cantil, Mirta G. Gonzalez, Pablo Puerta
Summary: This study investigates the ichnofacies and palaeosols from the La Pava and Coll ' on Cur ' a formations in Patagonia, Argentina during the Middle Miocene Climate Transition. The results suggest that the La Pava Formation represents wooded grasslands in seasonal, subhumid and temperate-warm conditions, while the Coll ' on Cur ' a Formation represents a habitat with reduced plant cover similar to semiarid and temperate-warm dry woodlands or bushlands. These findings provide insights into the evolution of terrestrial ecosystems in Patagonia during this transitional period.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Zoology
Florencia Paolucci, Marta S. Fernandez, Monica R. Buono, Jose Cuitino
Summary: The giant, dwarf, and pygmy sperm whale are the only three extant species of physeteroids. Fossil records of physeteroids in Miocene marine sediments in Patagonia, Argentina are significant. The taxonomic classification of 'Aulophyseter' rionegrensis has been a subject of debate for nearly a century, and recent phylogenetic analyses have not supported its proposed relationship with other species.
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2021)
Article
Multidisciplinary Sciences
Nelson Martin Novo, Marcelo Fabian Tejedor, Laureano Raul Gonzalez-Ruiz, John G. Fleagle, Diego Brandoni, Marcelo Krause
Summary: This study presents ten new dental specimens of primates from the early Miocene Pinturas Formation in Patagonia, Argentina. The specimens belong to known taxa from the formation and offer new morphological information, including similarities to known species and the need for further determination of affinities.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2021)
Article
Plant Sciences
Sabrina Natalia Fuentes
Summary: This study documents the distribution of dinoflagellate cysts in the YPF.Ch. PV. es-1 borehole, Peninsula Valdes, Argentina. The assemblages exhibit moderate to low diversity and are dominated by taxa of the order Gonyaulacales. Eight diagnostic events of highest occurrences (HOs) of dinoflagellate cyst taxa were identified, allowing for the subdivision of the sedimentary succession into two stratigraphic sections. The assemblages show similarity to those of the Northern Hemisphere, with the exception of one taxon that may indicate local paleoenvironmental conditions.
Article
Biology
A. Piro, C. Acosta Hospitaleche
Summary: Based on the characteristics of the carpometacarpus fossil, it is preliminarily determined to belong to the family Procellariidae, possibly representing a new genus and species. Further confirmation of this discovery will require more complete specimens.
HISTORICAL BIOLOGY
(2022)
Article
Geography, Physical
Carlos D. Greppi, Juan L. Garcia Massini, Roberto R. Pujana
Summary: The study examined permineralized woods from the Miocene strata in the southwestern region of Santa Cruz Province, Argentina, and identified six types of borings related to oribatid mites, beetles, and springtails. The host woods showed fungal decay and colonization by hyphae and spores, indicating interactions with arthropods and trees. The evidence suggests advanced decay of the analyzed woods before fossilization and active decomposition of woody substrates by various organisms in early Neogene forest ecosystems of Patagonia.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Environmental Sciences
Santiago I. Hurtado, Martin Calianno, Santino Adduca, Marcos H. Easdale
Summary: In the last few decades, the northern Patagonia region in Argentina has experienced a shift towards drier conditions, with decreasing precipitation and increasing temperatures. This has resulted in reduced streamflows in the Neuquen and Chubut rivers. The earlier onset of the second streamflow peak and the decline in spring streamflow highlight the importance of adapting water management strategies to meet summer-autumn water demands.
REGIONAL ENVIRONMENTAL CHANGE
(2023)
Article
Multidisciplinary Sciences
Julie Patris, Franck Malige, Madeleine Hamame, Herve Glotin, Valentin Barchasz, Valentin Gies, Sebastian Marzetti, Susannah Buchan
Summary: Coastal dolphins and porpoises in Chilean Patagonia, such as the Chilean dolphin, the Peale's dolphin, and the Burmeister's porpoise, face a threat from rapid human development. To study these poorly known species, new tools are urgently needed. One potential method is medium-term monitoring, combining continuous recording with a long-term click detector. The combination of recording and detection devices proves to be a good alternative for studying these species in remote areas.
Article
Evolutionary Biology
Mariana Viglino, Monica Romina Buono, Yoshihiro Tanaka, Jose Ignacio Cuitino, Robert Ewan Fordyce
Summary: Notocetus vanbenedeni is a valid platanistoid taxon with intermediate morphological features. Peruvian specimens cannot be assigned to this species based on anatomical differences and phylogenetic analyses. Notocetus vanbenedeni is the only suction-feeder recorded in the early Miocene of Patagonia and one of the smallest odontocetes. The abundant records of Notocetus vanbenedeni in a freshwater-influenced inner shelf environment suggest an early preference for such protected habitats.
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2022)
Article
Plant Sciences
Ricardo Alfredo del Barrio, Gustavo Adolfo Orioli, Andrea Soledad Brendel, Lilia Ivone Lindstroem, Cecilia Noemi Pellegrini, Jose Antonio Campoy
Summary: This study presents a multidisciplinary analysis of dormancy progression in walnut trees in northern Patagonia, linking forcing/field phenology, bud anatomical development, and soluble sugar dynamics. The results suggest that heat requirement is the main driver in phenology dynamics, and the decrease in sucrose may serve as a reliable biological marker for endodormancy release in walnut trees.
FRONTIERS IN PLANT SCIENCE
(2022)
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
Multidisciplinary Sciences
Alberto E. Perez, Rodrigo Moulian Tesmer, Juan Francisco Reyes Sanchez, Jose L. Lanata, Andrea Medina, Miguel Chapanoff Cerda
Summary: This article reports on a burial found at the Newen Antug site in Argentine Patagonia, which is a wooden canoe-shaped structure dating back to 880 years BP during the Late Pottery period. This is the first discovery of a burial in a canoe structure in the region and the southernmost example on the continent. It also provides the earliest record in Argentina of pottery of the Red on White Bichrome tradition used as a grave offering, expanding the shared characteristics between the two sides of the Andes mountains during the pottery periods.
Article
Environmental Sciences
Naiara Klopertanz, Martin Amestoy, Sergio Abate, Marina Winter
Summary: While the impact of plastic debris in Argentina has increased significantly in recent years, evidence of ingestion of such debris remains relatively low compared to other regions. This study found that one Great Grebe had ingested a single macroplastic piece, a yellow elastic band.
MARINE POLLUTION BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
E. E. Palopolo, A. Kroh, M. Harzhauser, M. Griffin, S. Casadio, N. Carmona
Summary: The study focused on a 27 m2 spatangoid-dominated bed in the Punta Entrada Member of the Monte Le ' on Formation, which contained 65 specimens. It was interpreted as a result of sedimentation in a subtidal environment with strong volcanic activity. Echinoids assigned to Brisaster aff. B. iheringi colonized a distal part of the subtidal environment characterized by large-scale bedforms. Upon reactivation of sediment migration, the echinoids were trapped by a high sedimentary influx.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Forestry
Facundo J. Oddi, Cecilia Casas, Matias G. Goldenberg, Juan P. Langlois, Jennifer B. Landesmann, Juan H. Gowda, Thomas Kitzberger, Lucas A. Garibaldi
Summary: The study developed a model for predicting the height of dominant trees of a southern South American conifer based on climate, topography, soil predictors, and tree age. It was found that dominant trees are taller in cooler and wetter sites with more soil carbon and lower soil acidity.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Paleontology
Leonardo Salgado, Fernando E. Novas, Manuel Suarez, Rita De La Cruz, Marcelo Isasi, David Rubilar-Rogers, Alexander Vargas
Article
Multidisciplinary Sciences
Alexander W. A. Kellner, David Rubilar-Rogers, Alexander Vargas, Mario Suarez
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2011)
Article
Geology
Roberto E. Yury-Yanez, Rodrigo A. Otero, Sergio Soto-Acuna, Mario E. Suarez, David Rubilar-Rogers, Michel Sallaberry
Article
Geology
Rodrigo A. Otero, James F. Parham, Sergio Soto-Acuna, Paulina Jimenez-Huidobro, David Rubilar-Rogers
CRETACEOUS RESEARCH
(2012)
Article
Geology
Andrea Poblete-Huanca, Manuel Suarez, David Rubilar-Rogers, Jean Baptiste Gressier, Constanza Arrano, Matias Ormazabal
Summary: Four vertebrae of a plesiosaur were found in the Katterfeld Formation of the Ayse = n Basin in Chile. Based on ammonoid biostratigraphy, they are assigned to the Hauterivian age. This discovery represents the southernmost and first record of plesiosaurs in the Lower Cretaceous and Hauterivian of Chile.
CRETACEOUS RESEARCH
(2021)
