Ana Julia Sagasti

Independent origins of endodermis in lycopsid and euphyllophyte roots

Xilan Yang, Maria Njo, Zishan Fu, Ana Julia Sagasti et autres

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Toward Process-Driven Research in Astrobiology: Stepping Away from the Binary Biogenicity Versus Abiogenicity Approach

Schuyler R. Borges, George A. Schaible, Ana Julia Sagasti, Bronwyn L. Teece et autres

Biological activity has shaped environments across Earth with varying degrees of impact throughout geological time, which complicates efforts to distinguish signs of life in preserved structures. This challenge is further compounded in the ancient rock record, where diagenesis and alteration obscure biological …

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Empowering women in science: A good practice guide

Paula De Tezanos Pintos, Josefina Bodnar, Valeria Casa, Eliana P. Coturel et autres

Empowerment can be thought of as a gain of power and autonomy by an unfavored group, which creates a better situation. Women in Science (WIS) face multiple barriers that ultimately affect their performance. There is an urgent need to reverse the inequalities …

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Decay stages of Jurassic wood debris from Scotland: evidence for the coevolution of fungal rot, arthropods and the nurse log strategy

Ana Julia Sagasti, Sophie Burne, Alexander J. Hetherington

A key feature of extant conifer forests is the high percentage of seeds that germinate and establish on dead wood; in some forests, this can exceed 90%. This deadwood can act as an ideal nursery for young tree species, leading to this …

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Fossil Geyserite and Testate Amoebae in Geothermal Spring Vent Pools: Paleoecology and Variable Preservation Quality in Jurassic Sinter of Patagonia (Deseado Massif, Argentina)

Ana Julia Sagasti, Kathleen A. Campbell, Juan L. García Massini, Amanda Galar et autres

Geyserite is a type of terrestrial siliceous hot spring deposit (sinter) formed subaerially in proximal vent areas, with near-neutral pH, alkali chloride discharge fluids characterized by initial high temperatures (~73°C to up to 100°C) that fluctuate rapidly in relation to dynamic hydrology, …

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Rhexoxylon piatnitzkyi and its ancient adversaries: deciphering plant-beetle interactions and its palaeoecological significance in the Ischigualasto Formation (Upper Triassic, Argentina)

Ana Julia Sagasti, Santiago Hernández Del Pino, Josefina Bodnar

We present the anatomical study of axes of the corystosperm Rhexoxylon piatnitzkyi and the interactions of this plant with wood-boring beetles. We used a CT scanner and thin sections to reconstruct the boring pattern inside the plant axes, as well as the …

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Biological decay by microorganisms in stems from the Upper Triassic Ischigualasto Formation (San Juan Province, Argentina): A striking microbial diversity in Carnian-Norian terrestrial ecosystems

Ana Julia Sagasti, Josefina Bodnar

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Araucariaceous fossil woods from the Upper Triassic Ischigualasto Formation (San Juan Province, Argentina): paleofloristic and paleoclimatic implications

Josefina Bodnar, Ana Julia Sagasti, Gustavo A. Correa, Victoria Miranda et autres

Abstract In this contribution, fossil woods from the Valle de La Luna Member of the Upper Triassic Ischigualasto Formation at Ischigualasto Provincial Park, San Juan Province, Argentina, are described. The specimens are preserved as silica permineralization in tuffs intercalated with carbonaceous mudstone …

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Filamentous cyanobacteria and associated microorganisms, structurally preserved in a Late Jurassic chert from Patagonia, Argentina

Juan L. García Massini, Diego M. Guido, Kathleen Campbell, Ana Julia Sagasti et autres

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Plant Taphonomy and Paleoenvironment of the Bahía Laura Complex, Middle–Late Jurassic, at the Laguna Flecha Negra Locality (Santa Cruz Province, Argentina)

Ana Julia Sagasti, Diego M. Guido, Juan L. García Massini, Kathleen A. Campbell

Taphonomic studies were carried out at Laguna Flecha Negra locality (Bahía Laura Complex, Middle–Late Jurassic), Santa Cruz Province, Argentina. Sedimentary facies and preservational styles were defined to recognize plant taphofacies in the studied sequence. Eleven taphofacies were identified and plant sources within …

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Middle-Late Jurassic megaflora of Laguna Flecha Negra locality in Santa Cruz Province, Patagonia, and floristic assemblages of the Bahía Laura Complex

Ana Julia Sagasti, Juan L. García Massini, Ignacio H. Escapa, Diego M. Guido et autres

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New paleofloristic elements and stratigraphic considerations for the Nestares Formation (Lower Jurassic, Argentina)

Ana Julia Sagasti, Eduardo M. Morel, Daniel G. Ganuza, Patricio Alan Knight

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