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Publications (10 of 43) Show all publications
Qvarnström, M., Niedzwiedzki, G., Tafforeau, P., Zigaite, Z. & Ahlberg, P. (2017). Synchrotron phase-contrast microtomography of coprolites generates novel palaeobiological data. Scientific Reports, 7, Article ID 2723.
Open this publication in new window or tab >>Synchrotron phase-contrast microtomography of coprolites generates novel palaeobiological data
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 2723Article in journal (Refereed) Published
Abstract [en]

Coprolites (fossil faeces) reveal clues to ancient trophic relations, and contain inclusions representing organisms that are rarely preserved elsewhere. However, much information is lost by classical techniques of investigation, which cannot find and image the inclusions in an adequate manner. We demonstrate that propagation phase-contrast synchrotron microtomography (PPC-SR mu CT) permits high-quality virtual 3D-reconstruction of coprolite inclusions, exemplified by two coprolites from the Upper Triassic locality Krasiejow, Poland; one of the coprolites contains delicate beetle remains, and the other one a partly articulated fish and fragments of bivalves.

Place, publisher, year, edition, pages
Nature Publishing Group, 2017
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-327451 (URN)10.1038/s41598-017-02893-9 (DOI)000402515800041 ()28578409 (PubMedID)
Available from: 2017-08-11 Created: 2017-08-11 Last updated: 2017-08-16Bibliographically approved
Mergl, M., Vaskaninova, V. & Zigaite, Z. (2017). Vertebrate Microremains From The Pragian, Emsian And Eifelian Of The Prague Basin (Czech Republic). Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica, 51(1/2), 1-12
Open this publication in new window or tab >>Vertebrate Microremains From The Pragian, Emsian And Eifelian Of The Prague Basin (Czech Republic)
2017 (English)In: Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica, E-ISSN 1805-286X, Vol. 51, no 1/2, p. 1-12Article in journal (Refereed) Published
Abstract [en]

The vertebrate faunas in limestone samples of the Early and Middle Devonian ages (Pragian, early Emsian, late Emsian, and latest Eifelian) which were collected from five localities in the Barrandian area, Bohemia, include scales, tesserae, bones, and teeth of acanthodians, placoderms, chondrichthyans, and sarcopterygians. Although the vertebrate remains are not abundant the assemblages are significant in being dominated by particular taxa. Apart from undetermined microremains the genera Cheiracanthoides, Laliacanthus, Nostolepis, and Tassiliodus were determined.

National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-379869 (URN)10.1515/fbgp-2017-0001 (DOI)
Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-03-21Bibliographically approved
Zigaite, Z., Whitehouse, M., Joachimski, M. M. & Sansom, I. (2017). δ18O as Seawater and Palaeoclimate Proxy: Results of in-situ SIMS in Modern Shark and ray Dental Apatite. In: : . Paper presented at Goldschmidt 2017, Paris, France, August 13-18, 2017. , Article ID 4537.
Open this publication in new window or tab >>δ18O as Seawater and Palaeoclimate Proxy: Results of in-situ SIMS in Modern Shark and ray Dental Apatite
2017 (English)Conference paper, Published paper (Refereed)
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-379920 (URN)
Conference
Goldschmidt 2017, Paris, France, August 13-18, 2017
Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-03-28Bibliographically approved
Zigaite Moro, Z., Whitehouse, M. & Joachimski, M. M. (2016). Les isotopes stables de l’oxygene dans des biominéraux dentaires des vertébrés actuels: différenciation au niveau des tissues et des espèces dans les dents de requins actuels. In: : . Paper presented at Réunion des Sciences de la Terre (RST 2016), Caen, France, 24-28 october 2016.
Open this publication in new window or tab >>Les isotopes stables de l’oxygene dans des biominéraux dentaires des vertébrés actuels: différenciation au niveau des tissues et des espèces dans les dents de requins actuels
2016 (French)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Geosciences, Multidisciplinary
Identifiers
urn:nbn:se:uu:diva-379905 (URN)
Conference
Réunion des Sciences de la Terre (RST 2016), Caen, France, 24-28 october 2016
Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-09-16Bibliographically approved
Zigaite, Z., Whitehouse, M., Joachimski, M. M., Sansom, I. & Ahlberg, P. E. (2016). Oxygen isotopes in modern and fossil ecosystems: model and case study overview. In: : . Paper presented at The IGCP 591 Closing Meeting, Ghent, Belgium 6-9 July 2016.
Open this publication in new window or tab >>Oxygen isotopes in modern and fossil ecosystems: model and case study overview
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2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Evolutionary Biology Other Earth and Related Environmental Sciences
Identifiers
urn:nbn:se:uu:diva-379907 (URN)
Conference
The IGCP 591 Closing Meeting, Ghent, Belgium 6-9 July 2016
Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-09-16Bibliographically approved
Zigaite, Z., Fadel, A., Perez-Huerta, A., Jeffries, T., Goujet, D. & Ahlberg, P. (2016). Palaeoenvironments revealed by rare-earth element systematics in vertebrate bioapatite from the Lower Devonian of Svalbard. Canadian journal of earth sciences (Print), 53(8), 788-794
Open this publication in new window or tab >>Palaeoenvironments revealed by rare-earth element systematics in vertebrate bioapatite from the Lower Devonian of Svalbard
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2016 (English)In: Canadian journal of earth sciences (Print), ISSN 0008-4077, E-ISSN 1480-3313, Vol. 53, no 8, p. 788-794Article in journal (Refereed) Published
Abstract [en]

In situ rare-earth element (REE) compositions have been measured in early vertebrate microremains from the Lower Devonian basin of Andree Land (Svalbard), with the aim of obtaining information about their early depositional environment and potential reworking. Vertebrate microremains with different histology were used for the analyses, sourced from two different localities of marginal marine to freshwater sediments from geographically distant parts of the Grey Hoek Formation (Skamdalen and Tavlefjellet members). We selected thelodont and undescribed ? chondrichthyan scales, which allowed us to define potential taxonomic, histological, and taphonomic variables of the REE uptake. Results showed REE concentrations to be relatively uniform within the scales of each taxon, but apparent discrepancies were visible between the studied localities and separate taxa. The compilation of REE abundance patterns as well as REE ratios have revealed that thelodont and ? chondrichthyan originating from the same locality must have had different burial and early diagenetic histories. The shapes of the REE profiles, together with the presence and absence of the Eu and Ce anomalies, equally suggested different depositional and diagenetic environments for these two sympatric taxa resulting from either stratigraphical or long-distance reworking. The REE concentrations appear to have visible differences between separate dental tissues, particularly between enameloid and dentine of thelodonts, emphasizing the importance of in situ measurements in microfossil biomineral geochemistry.

National Category
Geosciences, Multidisciplinary
Identifiers
urn:nbn:se:uu:diva-284236 (URN)10.1139/cjes-2015-0206 (DOI)000380910300006 ()
Available from: 2016-04-15 Created: 2016-04-15 Last updated: 2017-11-30Bibliographically approved
Qvarnström, M., Niedzwiedzki, G. & Zigaite, Z. (2016). Vertebrate coprolites (fossil faeces): An underexplored Konservat-Lagerstatte. Earth-Science Reviews, 162, 44-57
Open this publication in new window or tab >>Vertebrate coprolites (fossil faeces): An underexplored Konservat-Lagerstatte
2016 (English)In: Earth-Science Reviews, ISSN 0012-8252, E-ISSN 1872-6828, Vol. 162, p. 44-57Article, review/survey (Refereed) Published
Abstract [en]

Fossilized soft tissues of animals (e.g. muscles, hair and feathers) are valuable sources of palaeobiological information, but a poor preservation potential makes them undesirably scarce in the fossil record. The aim of this review is to summarize main findings, current progress and the analytical constraints of detecting fossilized soft tissues in coprolites from, mainly, freshwater and terrestrial carnivorous vertebrates. We conclude that soft-tissue inclusions in coprolites are sources of two important lines of information: the fossils can be put in a direct palaeoecological context, and characters of extinct taxa are more likely preserved in the phosphate-rich taphonomic microenvironment of coprolites than elsewhere. As a result, it is possible to unravel the deep-time origins of host-parasite relations, to understand ancient trophic food webs and detect new soft-tissue characters of different animal groups. Examples of the latter include muscle tissues from a tyrannosaurid prey, tapeworm eggs (including a developing embryo) in a Permian shark coprolite, as well as hair from multituberculates and, probably, from stem-mammals (Therapsids). Additionally, the use of coprolites in an archaeological context is briefly reviewed with focus on key aspects that may become implemented in studies of pre-Quaternary specimens as well. In summary, there is a wide range of information that can be extracted from coprolites, which has not yet been fully explored in palaeontological studies.

Keywords
Coprolites, Soft tissues, Lagerstatten, Phosphatization, Conservation traps, Palaeoecology
National Category
Geosciences, Multidisciplinary Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-311769 (URN)10.1016/j.earscirev.2016.08.014 (DOI)000388776700003 ()
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council, 2014-4367
Available from: 2017-01-02 Created: 2017-01-02 Last updated: 2017-11-29Bibliographically approved
Zivile, Z. & Histon, K. (Eds.). (2015). Evolutionary palaeoecology and palaeobiogeography. Tallinn: Estonian Academy Publishers
Open this publication in new window or tab >>Evolutionary palaeoecology and palaeobiogeography
2015 (English)Collection (editor) (Refereed)
Place, publisher, year, edition, pages
Tallinn: Estonian Academy Publishers, 2015. p. 120
Series
Estonian Journal of Earth Sciences, ISSN 1736-7557 ; 64(1)
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-253407 (URN)
Note

Special Issue of the Estonian Journal of Earth Sciences - Part 2

IGCP 591: The Early to Middle Paleozoic Revolution 4th Annual Meeting June 10–19, 2014, Estonia

Available from: 2015-05-26 Created: 2015-05-26 Last updated: 2017-01-25Bibliographically approved
Fadel, A., Zigaite, Z., Blom, H., Perez-Huerta, A., Jeffries, T., Maersse, T. & Ahlberg, P. E. (2015). Palaeoenvironmental signatures revealed from rare earth element (REE) compositions of vertebrate microremains of the Vesiku Bone Bed (Homerian, Wenlock), Saaremaa Island, Estonia. Estonian journal of earth sciences, 64(1), 36-41
Open this publication in new window or tab >>Palaeoenvironmental signatures revealed from rare earth element (REE) compositions of vertebrate microremains of the Vesiku Bone Bed (Homerian, Wenlock), Saaremaa Island, Estonia
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2015 (English)In: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, no 1, p. 36-41Article in journal (Refereed) Published
Abstract [en]

Rare earth elements (REEs) have been analysed from fossil vertebrate microremains (thelodont scales) from the Vesiku Bone Bed, Saaremaa, Estonia, using in situ microsampling by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Well-preserved scales of three species of the genus Thelodus (T. carinatus, T. laevis and Thelodus sp.) show very uniform REE patterns with slightly lower overall REE concentrations in enameloid than in dentine, with enrichment in middle REEs, depletion in heavy REEs and pronounced negative europium anomaly, but no cerium anomaly. The results of this study suggest a similar diagenetic history and possibly contemporaneous habitats for all three Thelodus species, as well as possible suboxic to anoxic conditions of the bottom and pore waters during the formation of the Vesiku Bone Bed.

Keywords
Vesiku Bone Bed, rare earth element, REE, palaeoenvironment, thelodonts, Silurian
National Category
Developmental Biology Earth and Related Environmental Sciences
Identifiers
urn:nbn:se:uu:diva-251825 (URN)10.3176/earth.2015.07 (DOI)000351327700008 ()
Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-12-04Bibliographically approved
Histon, K. & Zigaite, Z. (2015). Preface. Estonian journal of earth sciences, 64(1), 1-2
Open this publication in new window or tab >>Preface
2015 (English)In: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, no 1, p. 1-2Article in journal, Editorial material (Other academic) Published
Abstract [en]

Evolutionary palaeoecology and palaeobiogeography: year 4 of the IGCP-591 project 'The Early to Middle Palaeozoic Revolution - Bridging the Gap between the Great Ordovician Biodiversification Event and the Devonian Terrestrial Revolution

National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-253409 (URN)
Available from: 2015-05-26 Created: 2015-05-26 Last updated: 2017-12-04Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5209-5767

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