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  • 1
    Electronic Resource
    Electronic Resource
    An early Cambrian chert biota and its implications (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 719-720 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The chert horizon occurs within parallel laminated dolomites about 10 m above the base of the Eilean Dubh Formation of the Durness Group of north-west Scotland, near to Inchnadamph (NC 253213). Except for an unverified report of Salterella* this is the first report of organisms from this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/268719a0
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Nutrients in the early Cambrian (1990)
    [s.l.] : Nature Publishing Group
    Nature 347 (1990), S. 521-522 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-The Precambrian/Cambrian boundary interval is marked by explosive evolution of invertebrate taxa, including the first biomineralized skeletons and by major carbon isotope excursions. A comparison of recent data from each of these lines of evidence in Siberia and south China to Iran (see figure) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/347521b0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Foraminifera (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 541-541 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-The recent review of Dr J. W. Murray's book1 by Dr (Nature, 245, 442; 1973) may have confused a number of palaeoecologists by seeming to advocate absolute abundance rather than standardised abundance for the plotting of species distributions. The latter method, now widely employed, is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246541a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Grass Roots at the Base of the Neogene (1973)
    [s.l.] : Nature Publishing Group
    Nature 243 (1973), S. 342-342 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Graminae, although appearing in the Late Cretaceous, did not become abundant until early Neogene1. This group must have played a fundamental role in the shaping of Cainozoic ecosystems by providing a vast ground level food supply capable of being continuously cropped by herds of mammals, whilst ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/243342a0
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    Paper (German National Licenses)
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  • 5
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    Fossil indicators of nutrient levels 1: Eutrophication and climate change (1995)
    Geological Society
    In:  In: Marine palaeoenvironmental analysis from fossils. , ed. by Bosence, D. W. J. and Allison, P. A. Geological Society Special Publication, 83 . Geological Society, London, pp. 113-132.
    Details
    Publication Date: 2016-08-01
    Type: Book chapter , NonPeerReviewed
    Format: text
    DOI: 10.1144/GSL.SP.1995.083.01.07
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    OceanRep: Book chapter
  • 6
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    Heterotrophs in the ~1.9-Ga Gunflint chert [Earth, Atmospheric, and Planetary Sciences] (2013)
    National Academy of Sciences
    Details
    Publication Date: 2013-05-15
    Description: The 1.88-Ga Gunflint biota is one of the most famous Precambrian microfossil lagerstätten and provides a key record of the biosphere at a time of changing oceanic redox structure and chemistry. Here, we report on pyritized replicas of the iconic autotrophic Gunflintia–Huroniospora microfossil assemblage from the Schreiber Locality, Canada, that...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 7
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    Evidence for Cnidaria-like behavior in ca. 560 Ma Ediacaran Aspidella (2013)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2013-07-23
    Description: The first appearance of animals in the geological record is a matter of continuing debate: how deep were the roots of the Cambrian explosion? Molecular clock estimates indicate that the deepest divergences of the Metazoa had occurred by the Ediacaran Period (635–541 Ma), yet evidence of animal activity from well below the Ediacaran-Cambrian boundary has been rare and often questionable. Meanwhile, the Ediacaran macrobiota has remained enigmatic, as emphasized by recent controversial claims that South Australia Ediacaran forms were not marine animals at all, but land-based lichens and microbial colonies. Here we report evidence for animal-like behavior in a submerged setting in a key Ediacaran form, Aspidella terranovica Billings 1872, a discoidal fossil from the ca. 560 Ma Fermeuse Formation of Newfoundland (Canada). We describe sedimentary fabrics indicating progressive vertical movement of an organism through sediment in response to an aggrading sediment-water interface. Such equilibrium traces are familiar from the Phanerozoic and are observed in partially buried marine animals such as tube anemones today. Furthermore, horizontal trails closely comparable to trails previously described from ~565 m.y. old Mistaken Point (Newfoundland) are now linked to Aspidella . Our findings constitute evidence of both vertical and horizontal movement in a key Ediacaran taxon, consistent with an animal of cnidarian grade. Moreover, because Aspidella is also reported from the Rawnsley Quartzite of South Australia, our evidence conflicts with the proposed radical interpretation of that Ediacaran fossil assemblage. We demonstrate that at least some Ediacaran forms were probably early animals, and that they lived underwater.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 8
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    Distinguishing Earth's oldest known bryozoan (Pywackia, late Cambrian) from pennatulacean octocorals (Mesozoic-Recent) (2015)
    Paleontological Society
    Details
    Publication Date: 2015-07-30
    Description: Bryozoans and all biomineralized metazoan phyla extend back into the Cambrian. Pywackia Landing, 2010 is confirmed as a secondarily phosphatized, late Cambrian stenolaemate bryozoan with colonial habit; mineralized zooarium (originally calcareous); granular/rarely granular-prismatic histology of its trilamellar walls; and polymorphism shown by deep autozooecia with diaphragms and hemiphragms, axial zooecia with diaphragms, and probable nanozooecia. The irregular form of Pywackia reflects growth as a 14-hedron that could not branch and a lack of structures such as thickened walls or styles that maintain regular autozooecial spacing in later stenolaemates. Pywackia is a stem group stenolaemate with a stolon modified into a budding axial zooid and autozooid budding. It is morphologically simpler than the highly evolved late Tremadocian bryozoans of South China with features such as styles, cystiphragms, thickened zooecial walls, and massive or branching colonies. As with some bryozoans, Pywackia lacks holdfasts but has lineated living chambers and variably sized autozooecia. The late Cambrian origin of bryozoans, euconodonts, polyplacophorans, and cephalopods set the stage for the Ordovician Radiation’s complex communities. Pywackia is not a pennatulacean octocoral. It lacks both a pennatulacean axial rod histology and a budding zooid that remains confluent with daughter autozooids. Indeed, Pywackia walled off its axial zooid. Similarity of the 6- and 12-sided Pywackia zooarium with circular to 4-sided pennatulacean axes only includes calcareous composition and the general shapes of Pywackia zooaria and some Lituaria axial rods. The pennatulacean record does not extend from the Mesozoic into the Cambrian, and early cnidarians were not phosphatic. The diagnosis of Pywackia is modified.
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
    Published by Paleontological Society
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  • 9
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    The oldest evidence of bioturbation on Earth: COMMENT (2013)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2013-04-19
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 10
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    Evidence for Cnidaria-like behavior in ca. 560 Ma Ediacaran Aspidella: REPLY (2014)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2014-02-28
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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