Multitrophic interactions in a geothermal setting: Arthropod borings, actinomycetes, fungi and fungal-like microorganisms in a decomposing conifer wood from the Jurassic of Patagonia

Sagasti, Ana Julia; Massini, Juan Leandro García; Escapa, Ignacio H.; Guido, Diego M.

doi:10.1016/j.palaeo.2018.09.004

Cited by 25 publications

(9 citation statements)

References 88 publications

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“…The Laguna Flecha Negra locality records a fossil flora contained in rhyolitic, pyroclastic and epiclastic (fluvial) deposits with chert lenses located in the western edge of a 400 m diameter dry lagoon (Figs. 1.1, 2) (Channing et al, 2007;Sagasti, 2018;Sagasti et al, 2018Sagasti et al, , 2020. The outcrop sequence of Laguna Flecha Negra has been attributed to Middle-Late Jurassic Chon Aike and Bajo Pobre formations based on lithological characteristics and stratigraphic relationships with the units of the Bahía Laura Group (Channing et al, 2007).…”

Section: Geological Settingmentioning

confidence: 99%

“…Plant fossils from the Deseado Massif paleo hot springs are distributed over different geothermal sub environments, presumably following specific ecological preferences (Channing et al, 2007(Channing et al, , 2011García Massini et al, 2012aGuido et al, 2010;Sagasti et al, 2016). Silicification processes affecting these environments have also lead to fossilization of interactions between plants, arthropods, fungi and other microorganisms (García Massini et al, 2012bSagasti et al, 2018). In this paper, we provide the first description and interpretation of plant taphofacies in the Bahía Laura Complex at the Laguna Flecha Negra locality, Santa Cruz Province, Patagonia, Argentina.…”

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confidence: 99%

“…The Middle-Late Jurassic Bahía Laura Complex in Santa Cruz Province, hosts fossil-rich deposits formed in or at the margins of geothermal systems (Channing et al, 2007;García Massini et al, 2012aGuido & Campbell, 2009, 2019Guido et al, 2010;Sagasti et al, 2016Sagasti et al, , 2018Sagasti et al, , 2020. These are comparable to the famous Devonian Rhynie Chert (e.g.…”

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confidence: 99%

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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)

et al. 2021

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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 a volcanic and geothermal system are proposed. Plant remains are of autochthonous to para-autochthonous origin and best preservation was found in distal facies of siliceous hot spring (sinter) systems. Lateral and vertical taphonomic differences were found in the studied sequence. These are due to changes in the sedimentary input and distance to the geothermal fluids. Results enable the reconstruction of the depositional history of this region of the Deseado Massif geological Province. We infer formation of a hotspring (sinter) system that was subsequently destroyed by a phreatic eruption process at the margin of an andesitic effusive dome in partially reworked fall pyroclastic subfacies.After the destruction of the geothermal system, a fluvial and lacustrine epiclastic subfacies developed preserving a plant community typical of the Middle-Late Jurassic of Gondwana. Later, volcanic activity produced pyroclastic subfacies, with thick ashfall and flow deposits from different sources and separated by a time gap that promoted fossilization of an in situ forest. Taphonomic studies of these plant communities allowed reconstruction of a chain of geological events and how these processes have influenced the preservation of a Jurassic flora from Patagonia, thus contributing to an understanding of the paleoecology of the Deseado Massif geological province.

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Section: Geological Settingmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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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)

et al. 2021

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“…Gothan, 1905). In recent years, there has been an increasing awareness of fossil fungal remains, especially of wood-decay fungi in permineralized woods (e.g., Césari et al, 2012;Harper et al, 2012Harper et al, , 2016García et al, 2012;McLoughlin and Strullu-Derrien, 2016;Sagasti et al, 2019;Tian et al, 2020;.…”

Section: Introductionmentioning

confidence: 99%

A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance

Xie

Gee

Bennis

et al. 2021

Review of Palaeobotany and Palynology

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“…The abundant plant remains in these localities include completely preserved horsetails (Channing et al, 2011;García Massini et al, 2016) and diverse organs of mosses, gleicheniaceous and osmundaceous ferns, cycads, and conifers (Guido et al, 2010;García Massini et al, 2016;Sagasti et al, 2016;Bippus et al, 2019). Among conifer remains, several dispersed organs have been preliminary identified including wood fragments, leafy twigs, isolated single and multi-veined scale leaves, isolated ovules, pollen cones, pollen grains in situ and dispersed in the chert matrix, and roots, with different systematic affinities (Guido et al, 2010;García Massini et al, 2016;Sagasti et al, 2019). In particular, the presence of Podocarpaceae has been suggested based on numerous stems bearing brachyphyllous, single-veined leaves with two lateral bands of transfusion tissue, and pollen cones with in situ bisaccate pollen (Escapa et al, 2018).…”

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confidence: 99%

Sooty molds from the Jurassic of Patagonia, Argentina

Nunes

Massini

Escapa

et al. 2021

American J of Botany

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Premise The sooty molds are a globally distributed ecological group of ascomycetes with epiphyllous, saprotrophic habit, comprising several phylogenetically distant taxa (i.e., members of the classes Dothideomycetes and Eurotiomycetes). Their fossil record extends almost continuously back to the early Cretaceous; however, they are hypothesized to have originated in the early Mesozoic. Here, we describe new specimens of sooty molds associated with conifer leaves from Jurassic hot spring deposits of Patagonia, Argentina. Methods Thin sections of chert samples from the La Matilde Formation, Deseado Massif (Santa Cruz, Argentina) were observed using light microscopy. Results The fungi occur on the surface and axils of leafy twigs with podocarpaceous affinities, forming dense subicula comprised by opaque moniliform hyphae. Additionally, several asexual and sexual reproductive structures are observed. On the basis of vegetative (i.e., dense subicula composed of moniliform hyphae; hyphae composed of opaque cells deeply constricted at the septa) and reproductive characters (i.e., poroconidial and sympodioconidial asexual stages and diverse spores), two morphotypes were identified with affinities within lineages of the subphylum Pezizomycotina that encompass the ecological group of sooty molds, and a third morphotype was within the phylum Ascomycota. Conclusions This finding extends the fossil record of sooty molds to the Jurassic and their geographic fossil range to the South American continent. In particular, their association with podocarpaceous conifers is shown to be ancient, dating back to the Jurassic. This new record provides an additional reference point on the diversity of interactions that characterized Jurassic forests in Patagonia.

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Multitrophic interactions in a geothermal setting: Arthropod borings, actinomycetes, fungi and fungal-like microorganisms in a decomposing conifer wood from the Jurassic of Patagonia

Cited by 25 publications

References 88 publications

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

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

A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance

Sooty molds from the Jurassic of Patagonia, Argentina

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