Download or read book Taxonomy and Paleoecology of Lyssacinosan Hexactinellida from the Upper Cretaceous Coniacian of Bornholm Denmark in Comparison with Other Postpaleozoic Representatives written by Anke Brückner and published by . This book was released on 2006 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponges occur in three large groups. The Hexactinellida, the Demospongiae and the Calcarea. The Hexactinellida are divided into the Hexactinosa, the Lychniscosa and the Lyssacinosa. The first two have a rigid skeleton, whereas the latter are sponges with loose spicules sitting in their soft parts. They are widely spread over the oceans today. It is difficult to study Lyssacinosa, due to their preferred deep sea habitat, and therefore little is known about their way of living. The sedimentology and the faunal composition of the Arnager Limestone (ca. 88 Ma), aside from the sponges, is discussed. Together with the sponge fauna a three-dimensional picture can be drawn to show the conditions and the nature of the habitat the Lyssacinosa lived in.

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Download or read book Report on the Scientific Results of the Voyage of H M S Challenger During the Years 1873 76 Under the Command of Captain George S Nares and the Late Captain Frank Tourle Thomson written by Great Britain. Challenger Office and published by . This book was released on 1887 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Library of Congress Subject Headings P Z written by Library of Congress. Subject Cataloging Division and published by . This book was released on 1989 with total page 1546 pages. Available in PDF, EPUB and Kindle. Book excerpt: