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  • 1
    Call number: 9/M 07.0421(485)
    In: Special publications / the Geological Society, London, No. 485
    Description / Table of Contents: About 40 million years after the Cambrian Explosion, the Great Ordovician Biodiversification Event (GOBE) represents a second and dramatic burst in marine biodiversity, with major changes in the structure of ecosystems and the progressive replacement of the distinctive Cambrian Evolutionary Fauna by the Paleozoic Evolutionary Fauna. However, the GOBE is not a single, worldwide, short-term event, but rather the complex sum of successive diversifications occurring in distinct taxonomic groups, trophic guilds and regions. This book focuses on the Late Ordovician Tafilalt Biota, Anti-Atlas Morocco, which provides a snapshot of the GOBE in high-latitude regions of the Southern Hemisphere. A series of contributions explore different aspects of the Tafilalt Biota, including its geological setting, the international fossil trade in this area and a series of detailed systematic contributions describing many new taxa of marine invertebrates. This volume represents a significant contribution to the understanding of the Tafilalt Biota and its significance to the GOBE.
    Type of Medium: Monograph available for loan
    Pages: vi, 615 Seiten , Illustrationen , 26 cm
    ISBN: 9781786204073 , 978-1-78620-407-3 , 178620407X
    ISSN: 0305-8719
    Series Statement: Special publications / the Geological Society, London No. 485
    Language: English
    Note: Contents Dedication Hunter, A. W., Álvaro, J. J., Lefebvre, B., Van Roy, P. and Zamora, S. / An introduction to the Great Ordovician Biodiversification Event: insights from the Tafilalt Biota, Morocco Geological and faunal context Lefebvre, B., Van Roy, P., Zamora, S., Gutiérrez-Marco, J. C. and Nohejlová, M. / The Late Ordovician Tafilalt Biota, Anti-Atlas, Morocco: A high-latitude perspective on the GOBE Álvaro, J. J., Benharref, M., Destombes, J., Gutiérrez-Marco, J. C., Hunter, A. W., Lefebvre, B., Van Roy, P. and Zamora, S. / Ordovician stratigraphy and benthic community replacements in the eastern Anti-Atlas, Morocco International fossil trade Gutiérrez-Marco, J. C. and García-Bellido, D. C. / The international fossil trade from the Paleozoic of the Anti-Atlas, Morocco Early Paleozoic faunas from the Anti-Atlas Gutiérrez-Marco, J. C., Pereira, S., García-Bellido, D. C. and Rábano, I. / Ordovician trilobites from the Tafilalt Lagerstätte: new data and reappraisal of the Bou Nemrou assemblage Budil, P. and Fatka, O. / Ordovician trilobites with soft parts in African West Gondwana, European peri-Gondwana and Avalonia: a review Colmenar, J., Villas, E. and Rasmussen, C. M. Ø. / A synopsis of Late Ordovician brachiopod diversity in the Anti-Atlas, Morocco Villas, E. and Colmenar, J. / Brachiopods from the Upper Ordovician of Erfoud (eastern Anti-Atlas, Morocco) and the stratigraphic correlation of the bryozoan-rich Khabt-el Hajar Formation Van Iten, H., Gutiérrez-Marco, J. C., Muir, L. A., Simões, M. G. and Leme, J. M. / Ordovician conulariids (Scyphozoa) from the Upper Tiouririne Formation (Katian), eastern Anti-Atlas Mountains, southern Morocco Ernst, A. / Upper Ordovician bryozoans of Morocco Gutiérrez-Marco, J. C., Muir, L. A. and Mitchell, C. E. / Upper Ordovician planktic and benthic graptolites and a possible hydroid from the Tafilalt Biota, southeastern Morocco Ebbestad, J. O. R., Polechová, M., Kröger, B. and Gutiérrez-Marco, J. C. / Late Ordovician molluscs of the central and eastern Anti-Atlas, Morocco Muir, L. A., Botting, J. P., Walker, S. N. A., Schiffbauer, J. D. and MacGabhann, B. A. / Onuphionella corusca sp. nov.: an early Cambrian-type agglutinated tube from Upper Ordovician strata of Morocco Echinoderm Lagerstätten Lefebvre, B., Nohejlová, M., Kašička, L. and Zicha, O. / New peri-Gondwanan occurrences of the Ordovician genus Diamphidiocystis (Echinodermata, Stylophora): implications for mitrocystitid palaeobiogeography and diversity Lefebvre, B., Nohejlová, M., Martin, E. L. O., Kašič ka, L., Zicha, O. and Gutiérrez-Marco, J. C. / New Middle and Late Ordovician cornute stylophorans (Echinodermata) from Morocco and other peri-Gondwanan areas Nohejlová, M. and Lefebvre, B. / Late Ordovician solutan echinoderms from the Western Tafilalt, Morocco Botting, J. P. / Late Ordovician crinoids from the Anti-Atlas region of Morocco Sumrall, C. D. and Zamora, S. / New Upper Ordovician edrioasteroids from Morocco Zamora, S. and Sumrall, C. D. / Hexedriocystis, an aberrant echinoderm from the Upper Ordovician of Morocco Zamora, S., Nardin, E., Esteve, J. and Gutiérrez-Marco, J. C. / New rhombiferan blastozoans (Echinodermata) from the Late Ordovician of Morocco Zamora, S. and Sumrall, C. D. / The first report of coronates (echinodermata) from Africa Index
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  • 2
    Call number: 10.1144/SP485 (e-book)
    In: Special publications / the Geological Society, London, No. 485
    Description / Table of Contents: About 40 million years after the Cambrian Explosion, the Great Ordovician Biodiversification Event (GOBE) represents a second and dramatic burst in marine biodiversity, with major changes in the structure of ecosystems and the progressive replacement of the distinctive Cambrian Evolutionary Fauna by the Paleozoic Evolutionary Fauna. However, the GOBE is not a single, worldwide, short-term event, but rather the complex sum of successive diversifications occurring in distinct taxonomic groups, trophic guilds and regions. This book focuses on the Late Ordovician Tafilalt Biota, Anti-Atlas Morocco, which provides a snapshot of the GOBE in high-latitude regions of the Southern Hemisphere. A series of contributions explore different aspects of the Tafilalt Biota, including its geological setting, the international fossil trade in this area and a series of detailed systematic contributions describing many new taxa of marine invertebrates. This volume represents a significant contribution to the understanding of the Tafilalt Biota and its significance to the GOBE.
    Type of Medium: 12
    Pages: 1 Online-Ressource (vi, 615 Seiten) , Illustrationen
    ISBN: 9781786204073 , 978-1-78620-407-3 , 178620407X
    ISSN: 0305-8719
    Series Statement: Special publications / the Geological Society, London No. 485
    Language: English
    Note: Contents Dedication Hunter, A. W., Álvaro, J. J., Lefebvre, B., Van Roy, P. and Zamora, S. / An introduction to the Great Ordovician Biodiversification Event: insights from the Tafilalt Biota, Morocco Geological and faunal context Lefebvre, B., Van Roy, P., Zamora, S., Gutiérrez-Marco, J. C. and Nohejlová, M. / The Late Ordovician Tafilalt Biota, Anti-Atlas, Morocco: A high-latitude perspective on the GOBE Álvaro, J. J., Benharref, M., Destombes, J., Gutiérrez-Marco, J. C., Hunter, A. W., Lefebvre, B., Van Roy, P. and Zamora, S. / Ordovician stratigraphy and benthic community replacements in the eastern Anti-Atlas, Morocco International fossil trade Gutiérrez-Marco, J. C. and García-Bellido, D. C. / The international fossil trade from the Paleozoic of the Anti-Atlas, Morocco Early Paleozoic faunas from the Anti-Atlas Gutiérrez-Marco, J. C., Pereira, S., García-Bellido, D. C. and Rábano, I. / Ordovician trilobites from the Tafilalt Lagerstätte: new data and reappraisal of the Bou Nemrou assemblage Budil, P. and Fatka, O. / Ordovician trilobites with soft parts in African West Gondwana, European peri-Gondwana and Avalonia: a review Colmenar, J., Villas, E. and Rasmussen, C. M. Ø. / A synopsis of Late Ordovician brachiopod diversity in the Anti-Atlas, Morocco Villas, E. and Colmenar, J. / Brachiopods from the Upper Ordovician of Erfoud (eastern Anti-Atlas, Morocco) and the stratigraphic correlation of the bryozoan-rich Khabt-el Hajar Formation Van Iten, H., Gutiérrez-Marco, J. C., Muir, L. A., Simões, M. G. and Leme, J. M. / Ordovician conulariids (Scyphozoa) from the Upper Tiouririne Formation (Katian), eastern Anti-Atlas Mountains, southern Morocco Ernst, A. / Upper Ordovician bryozoans of Morocco Gutiérrez-Marco, J. C., Muir, L. A. and Mitchell, C. E. / Upper Ordovician planktic and benthic graptolites and a possible hydroid from the Tafilalt Biota, southeastern Morocco Ebbestad, J. O. R., Polechová, M., Kröger, B. and Gutiérrez-Marco, J. C. / Late Ordovician molluscs of the central and eastern Anti-Atlas, Morocco Muir, L. A., Botting, J. P., Walker, S. N. A., Schiffbauer, J. D. and MacGabhann, B. A. / Onuphionella corusca sp. nov.: an early Cambrian-type agglutinated tube from Upper Ordovician strata of Morocco Echinoderm Lagerstätten Lefebvre, B., Nohejlová, M., Kašička, L. and Zicha, O. / New peri-Gondwanan occurrences of the Ordovician genus Diamphidiocystis (Echinodermata, Stylophora): implications for mitrocystitid palaeobiogeography and diversity Lefebvre, B., Nohejlová, M., Martin, E. L. O., Kašič ka, L., Zicha, O. and Gutiérrez-Marco, J. C. / New Middle and Late Ordovician cornute stylophorans (Echinodermata) from Morocco and other peri-Gondwanan areas Nohejlová, M. and Lefebvre, B. / Late Ordovician solutan echinoderms from the Western Tafilalt, Morocco Botting, J. P. / Late Ordovician crinoids from the Anti-Atlas region of Morocco Sumrall, C. D. and Zamora, S. / New Upper Ordovician edrioasteroids from Morocco Zamora, S. and Sumrall, C. D. / Hexedriocystis, an aberrant echinoderm from the Upper Ordovician of Morocco Zamora, S., Nardin, E., Esteve, J. and Gutiérrez-Marco, J. C. / New rhombiferan blastozoans (Echinodermata) from the Late Ordovician of Morocco Zamora, S. and Sumrall, C. D. / The first report of coronates (echinodermata) from Africa Index
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  • 3
    Publication Date: 2011-06-01
    Description: Localities bearing abundant enrolled Cambrian trilobites are extremely rare, but here we report a new and exceptional such assemblage with a high diversity of enrolled specimens from the middle Cambrian of Spain. This novel find demonstrates that encapsulated enrollment was a behavioral response available to many of the early benthic trilobite morphotypes. This result provides a new perspective for reviewing the evolution of trilobite enrollment through the Paleozoic. We find a significant and consistent increase in the proportion of enrolled trilobites within assemblages bearing abundant articulated trilobites. Similarly, the mean number of coaptative devices also increased progressively during the Paleozoic. Such devices likely provided later enrolled trilobites with greater structural integrity, and may support an escalatory model of trilobite defense evolution. Likewise, environmental circumstances favoring the preservation of enrolled trilobites may have become more common during post-Cambrian time.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
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  • 4
    Publication Date: 2017-12-12
    Print ISSN: 0883-1351
    Electronic ISSN: 0883-1351
    Topics: Geosciences
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  • 5
  • 6
    Publication Date: 2017-05-09
    Description: Moroccodiscus smithirepresents a new cyclocystoid genus and species based on moldic specimens from the Middle Ordovician Taddrist Formation (Darriwilian) of SE Morocco. This represents the earliest articulated member of the Cyclocystoidea and is the first complete cyclocystoid described from the Ordovician of Gondwana, as well as the first cyclocystoid ever recorded from Africa. The anatomy and morphology of this new species were studied using a combination of conventional paleontological methods and nondestructive X-ray computed tomography. BecauseMoroccodiscusdiffers from other cyclocystoids, in particular by lacking cupules attached to the marginal ossicles, it is assigned to the new family Moroccodiscidae. This new taxon illustrates the relatively poorly known early diversification of these enigmatic extinct echinoderms and sheds light on the mode of life of cyclocystoids, including injuries to plate circlets during early ontogeny and folding of these disk-like specimens at the time of death. The overall thecal shape was very similar in cyclocystoids and many domal edrioasteroids, probably because they were both sessile or attached, benthic, suspension feeders. However, many oral surface, ambulacral, and marginal ring features had become very different, indicating that these two groups had either converged because of similar life modes or were only distantly related sister groups.
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
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  • 7
    Publication Date: 2017-06-19
    Print ISSN: 0016-7568
    Electronic ISSN: 1469-5081
    Topics: Geosciences
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  • 8
    Publication Date: 2017-05-10
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
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  • 9
    Publication Date: 2009-09-22
    Print ISSN: 0031-0220
    Electronic ISSN: 1867-6812
    Topics: Geosciences
    Published by Springer
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  • 10
    Publication Date: 2016-04-25
    Description: Pleurocystitid rhombiferans are among the most unusual echinoderms whose mode of life has been long debated. These echinoderms are usually interpreted as vagile epibenthic echinoderms, moving over the sea bottom by means of a flexible stem. Although their life habits and posture are reasonably well understood, the mechanisms that control the movement of stem are highly controversial. Specifically, it is unknown whether the stem flexibility was under the control of muscles or ligamentary mutable collagenous tissues (MCTs). Here, we reconstruct palaeoanatomy of the two Ordovician pleurocystitid rhombiferans (PleurocystitesandAmecystis) based on stereom microstructure. We show that the articular facets of columnals in pleurocystitid rhombiferans are composed of fine labyrinthic stereom. Comparison with modern echinoderms suggests that this type of stereom was associated with muscles implying that their stem was a muscular locomotory organ supporting an active mode of life.
    Electronic ISSN: 2167-8359
    Topics: Biology , Medicine
    Published by PeerJ
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