Boring Polychaetes Associated withPycnodonte(Phygraea)Vesicularis(Lamarck) from the Upper Cretaceous of Patagonia. A Case of Commensalism?

Brezina, Soledad Silvana; Romero, Matías; Casadı́o, Silvio; Bremec, Claudia

doi:10.5710/amgh.04.12.2013.1266

Cited by 22 publications

(22 citation statements)

References 52 publications

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“…Mudstones dominating the Maastrichtian and Danian sediments from the Jagüel Formation are homogeneous, nonlaminated, and therefore presumably intensely bioturbated, indicating a reasonably well‐oxygenated seafloor [ Scasso et al , ]. The presence of common bivalves and the rare to common occurrence of planktic foraminifera indicate deposition at midshelf depth [ Bertels , ; Scasso et al , ; Brezina et al , ].…”

Section: Geological Settingmentioning

confidence: 99%

Latest Cretaceous climatic and environmental change in the South Atlantic region

et al. 2017

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Latest Maastrichtian climate change caused by Deccan volcanism has been invoked as a cause of mass extinction at the Cretaceous‐Paleogene (K‐Pg) boundary (~66.0 Ma). Yet late Maastrichtian climate and ecological changes are poorly documented, in particular on the Southern Hemisphere. Here we present upper Maastrichtian‐lower Danian climate and biotic records from the Bajada del Jagüel (BJ) shelf site (Neuquén Basin, Argentina), employing the TEX86 paleothermometer, marine palynology (dinoflagellate cysts), and micropaleontology (foraminifera). These records are correlated to the astronomically tuned Ocean Drilling Program Site 1262 (Walvis Ridge). Collectively, we use these records to assess climatic and ecological effects of Deccan volcanism in the Southern Atlantic region. Both the TEX86‐based sea surface temperature (SST) record at BJ and the bulk carbonate δ18O‐based SST record of Site 1262 show a latest Maastrichtian warming of ~2.5–4°C, at 450 to 150 kyr before the K‐Pg boundary, coinciding with the a large Deccan outpouring phase. Benthic foraminiferal and dinocyst assemblage changes indicate that this warming resulted in enhanced runoff and stratification of the water column, likely resulting from more humid climate conditions in the Neuquén Basin. These climate conditions could have been caused by an expanding and strengthening thermal low over the South American continent. Biotic changes in response to late Maastrichtian environmental changes are rather limited, when compared to the major turnovers observed at many K‐Pg boundary sites worldwide. This suggests that environmental perturbations during the latest Maastrichtian warming event were less severe than those following the K‐Pg boundary impact.

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Section: Geological Settingmentioning

confidence: 99%

Latest Cretaceous climatic and environmental change in the South Atlantic region

et al. 2017

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“…While the shell structure is in general very well preserved ( Fig. 3d-h), it is disturbed in some areas by patches of different texture or holes that have been previously ascribed to boring by polychaete worms (Brezina et al, 2014).…”

Section: Shell Microstructuresmentioning

confidence: 79%

“…Pycnodonte vesicularis was reclining and inhabited muddy bottoms on the shallow marine shelf with a low sedimentation rate (e.g. Brezina et al, 2014). Individual valves of P. vesicularis vary considerably in dimension, outline, convexity, wall thickness, muscle scar position, deepness, shape and the characteristics of chomata (Pugaczewska, 1977;Brezina et al, 2014).…”

Section: The Species Pycnodonte Vesicularismentioning

confidence: 99%

“…Brezina et al, 2014). Individual valves of P. vesicularis vary considerably in dimension, outline, convexity, wall thickness, muscle scar position, deepness, shape and the characteristics of chomata (Pugaczewska, 1977;Brezina et al, 2014). This variability depends on the age of the individual and local environmental conditions, especially the substrate.…”

Section: The Species Pycnodonte Vesicularismentioning

confidence: 99%

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An assessment of latest Cretaceous Pycnodonte vesicularis (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation

et al. 2018

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In order to assess the potential of the honeycomb oyster Pycnodonte vesicularis for the reconstruction of palaeoseasonality, several specimens recovered from late Maastrichtian strata in the Neuquén Basin (Argentina) were subject to a multi-proxy investigation, involving scanning techniques and trace element and isotopic analysis. Combined CT scanning and light microscopy reveals two calcite microstructures in P. vesicularis shells (vesicular and foliated calcite). Micro-XRF analysis and cathodoluminescence microscopy show that reducing pore fluids were able to migrate through the vesicular portions of the shells (aided by bore holes) and cause recrystallization of the vesicular calcite. This renders the vesicular portions not suitable for palaeoenvironmental reconstruction. In contrast, stable isotope and trace element compositions show that the original chemical composition of the foliated calcite is wellpreserved and can be used for the reconstruction of palaeoenvironmental conditions. Stable oxygen and clumped isotope thermometry on carbonate from the dense hinge of the shell yield sea water temperatures of 11 • C, while previous TEX H 86

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“…As other authors have shown, mostly for bivalve shells (Staff and Powell, 1990;Lorenzo and Verde, 2004;Casadío et al, 2005;Parras and Casadío, 2006;Santos and Mayoral, 2008;Brezina et al, 2014;Santos et al, 2014), significant sectors of the shells can be established on their external surfaces. Only a very small number of our shells exhibit bioerosion structures on the internal surface.…”

Section: Accepted Manuscriptmentioning

confidence: 91%

Bioerosion structures in Crepidula (Mollusca, Gastropoda) as indicators of latitudinal palaeoenvironmental changes: Example from the marine Quaternary of Argentina

Richiano

Aguirre

Ester

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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Boring Polychaetes Associated withPycnodonte(Phygraea)Vesicularis(Lamarck) from the Upper Cretaceous of Patagonia. A Case of Commensalism?

Cited by 22 publications

References 52 publications

Latest Cretaceous climatic and environmental change in the South Atlantic region

Latest Cretaceous climatic and environmental change in the South Atlantic region

An assessment of latest Cretaceous <i>Pycnodonte vesicularis</i> (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation

Bioerosion structures in Crepidula (Mollusca, Gastropoda) as indicators of latitudinal palaeoenvironmental changes: Example from the marine Quaternary of Argentina

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Boring Polychaetes Associated withPycnodonte(Phygraea)Vesicularis(Lamarck) from the Upper Cretaceous of Patagonia. A Case of Commensalism?

Cited by 22 publications

References 52 publications

Latest Cretaceous climatic and environmental change in the South Atlantic region

Latest Cretaceous climatic and environmental change in the South Atlantic region

An assessment of latest Cretaceous &lt;i&gt;Pycnodonte vesicularis&lt;/i&gt; (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation

Bioerosion structures in Crepidula (Mollusca, Gastropoda) as indicators of latitudinal palaeoenvironmental changes: Example from the marine Quaternary of Argentina

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An assessment of latest Cretaceous <i>Pycnodonte vesicularis</i> (Lamarck, 1806) shells as records for palaeoseasonality: a multi-proxy investigation