Results 21 to 30 of about 3,426 (182)

High Geomagnetic Reversal Frequency During the Middle to Late Ediacaran (∼570 Ma) Constrained by Integrated Magneto‐ and Cyclostratigraphy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso, R. M. Rocha, D. R. Franco, N. B. Dos Santos, C. G. Leandro, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. E. Gómez‐Peral, D. G. Poiré, S. Caetano‐Filho, H. D. Brito, R. I. F. Trindade   +12 more
wiley   +1 more source

Digenean parasites of the Neotropic Cormorant, Phalacrocorax brasilianus (Gmelin, 1789) (Aves: Phalacrocoracidae) from Argentina: distribution extension and new host records [PDF]

Check List, 2011
Thirteen specimens of Phalacrocorax brasilianus (Gmelin, 1789) from three areas of the Chaqueña Subregion of Argentina were examined for digeneans. Ten species were found: four diplostomids (Austrodiplostomum mordax, A.
Fabiana Drago, Lía Lunaschi, Maria Schenone   +2 more
doaj   +3 more sources

Sulfur‐Rich μ‐O Diiron Catalyst for Electrochemical Hydrogen Production

European Journal of Inorganic Chemistry, Volume 29, Issue 8, 10 March 2026.
A diferric μ‐oxido complex supported by a sulfur‐rich scaffold acts as a proton‐reduction electrocatalyst for H2 production via a μ‐hydroxido species. An aminodithiophenolate scaffold with an NS2 donor set supports diiron complex formation. The diferrous precursor activates O2, giving rise to a diferric μ‐oxido species, which acts as a proton‐reduction
Hugo C. Hernández‐Toledo, Víctor E. López‐Guerrero, Alexander Mondragón‐Díaz, Elvis Robles‐Marín, Marcos Flores‐Alamo, José Manuel Guevara‐Vela, Tomás Rocha‐Rinza, Ivan Castillo   +7 more
wiley   +1 more source

Two new records for the flora of Paraguay: Stemodia diplohyptoides and S. lobelioides (Plantaginaceae:Gratioleae)

Nordic Journal of Botany, Volume 2026, Issue 3, March 2026.
Stemodia diplohyptoides M.M.Sosa & Dematt. and S. lobelioides Lehm. (Gratioleae, Plantaginaceae) are reported for the first time in Paraguay, found in Alto Paraná and Presidente Hayes departments, respectively. These new records extend the known geographical range of both species, representing the northern records to date, S.
Y. Carlés Bechara, S. Y. Gauto, V. R. Kubota, O. A. Feltes González, M. M. Sosa   +4 more
wiley   +1 more source

Los quilopodos escolopendromorfos del Museo de La Plata [PDF]

Revista del Museo de La Plata, 1955
En el presente trabajo se ha hecho el estudio sistemático de los Escolopendromorfos existentes en la colección de la División Zoología Invertebrados del Museo de La Plata. Esta colección posee aproximadamente 200 lotes de distintos lugares del país.
openaire   +1 more source

Plants and Insect Eggs: First Report of a Katydid Using a Fern as Host for Oviposition

New Zealand Journal of Botany, Volume 64, Issue 1, March 2026.
Ferns are the second most diverse lineage of vascular plants worldwide and are particularly abundant in tropical forests. However, the ecological significance of such remarkable diversity has been often underestimated. In this article, we report for the first time the observation of ferns, specifically Polytaenium cajenense (Desv.) Benedict ...
Rafael P. Farias, Maria V. P. Q. Ramos, Danielle F. Cardoso, Ana P. T. Barreto, Evelyn S. Silva, Klaus‐Gerhard Heller   +5 more
wiley   +1 more source

And then there were none: decrease of origination and the decline of Conulariida

Papers in Palaeontology, Volume 12, Issue 2, March/April 2026.
Abstract Although the evolutionary history of conulariids has been widely studied, previous works have focused mostly on limited time intervals. In this paper, we examine the diversity dynamics of the group throughout its entire history, using various mathematical approaches.
Julio Bernad, Javier Echevarría, Sonia Ros‐Franch   +2 more
wiley   +1 more source

Partial analyses of humeral shape in sauropodomorph dinosaurs highlight a hidden modularity and the differential evolution of sauropod bauplan‐related traits

Palaeontology, Volume 69, Issue 2, 2026.
Abstract Sauropods are the largest‐known terrestrial animals, characterized by their columnar limbs and obligate quadrupedality. They are nested within Sauropodomorpha, a clade whose earliest representatives were, however, small bipeds. The early evolution of gigantism and quadrupedality within sauropodomorphs remains debated, since several non ...
Rémi Lefebvre, Lucie Partout, Heinrich Mallison, Alexandra Houssaye   +3 more
wiley   +1 more source

Nuevo plan de estudios del Doctorado en Ciencias Naturales y reglamentaciones pertinentes

Revista del Museo de La Plata
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Museo de La Plata -
doaj  

Taller IV: Aportes y discusiones en zooarqueología

Revista del Museo de La Plata, 2018
CICLO DE TALLERES DE LA DIVISIÃ?N ARQUEOLOGÍA Museo de La Plata, Facultad de Ciencias Naturales y Museo     Taller IV: Aportes y discusiones en zooarqueología     Libro de Resúmenes 19 de Octubre de 2018, Museo de La Plata Organizado porDivisión ...
Laura Marchionni, Eloisa García Añino, Emiliano Mange   +2 more
doaj   +1 more source