Late Devonian Sponges of Western Australia
Author : J. Keith Rigby
Publisher :
Page : 80 pages
File Size : 32,31 MB
Release : 1986
Category : Science
ISBN :
Author : J. Keith Rigby
Publisher :
Page : 80 pages
File Size : 32,31 MB
Release : 1986
Category : Science
ISBN :
Author : Joachim Reitner
Publisher : Springer Science & Business Media
Page : 606 pages
File Size : 45,98 MB
Release : 2012-12-06
Category : Science
ISBN : 3642756565
Fossil and Recent Sponges contains articles on taxonomic, phylogenetic and ecological aspects of sponges of both biological and paleontological interest. They focus on three main topics: phylogeny and systematics, biology, and paleoecology of sponges. The reader is offered an overview over the most important aspects of current sponge research: - establishment of a new taxonomy based on mono phyletic groups (phylogenetic systematics) including recent and fossil taxa - new concepts of the biomineralisation of sponge skeletons - palaeoenvironmental analysis of fossil sponge buildups.
Author : Ronald A. Johns
Publisher : NV Bureau of Mines & Geology
Page : 200 pages
File Size : 43,39 MB
Release : 1994
Category : Animals, Fossil
ISBN :
Author : Freek Rhebergen
Publisher : John Wiley & Sons
Page : 88 pages
File Size : 28,39 MB
Release : 2014-02-20
Category : Science
ISBN : 1118906632
A newly discovered, diverse sponge fauna of early Silurian age, is described from Gotland, Sweden. This is the first Silurian sponge assemblage known from Baltica, and the only diverse Llandoverian assemblage known worldwide. The fauna includes 20 genera and 29 species, of which three genera and six species are new. Eighteen species are new to Baltica. The fauna shows strong similarities to later Silurian assemblages in Arctic Canada, but one endemic species comprises ca. 50% of the fauna. The fauna shows that lithistid sponges recovered well from the late Ordovician extinction in some areas, and became widely spread in the early Silurian. In contrast, non-lithistid sponges like, such as hexactinellids, appear to have evolved rapidly during the Late Ordovician – early Silurian interval, and some modern groups probably originated in inshore habitats.
Author : John N.A. Hooper
Publisher : Springer Science & Business Media
Page : 1779 pages
File Size : 30,21 MB
Release : 2012-12-06
Category : Science
ISBN : 1461507472
Research whilst compiling this book has uncovered a fauna about twice the size as that previously published in the literature and consequently Systema Porifera revises and stabilizes the systematics of the phylum to accommodate this new knowledge in a contemporary framework. Practical tools (key illustrations, descriptions of character) are provided to facilitate the assignment of approximately 680 extant and 100 fossil genera. Systema Porifera is unique making sponge taxonomy widely available at the practical level of classification (genera, families, order). It is a taxonomic revision of sponges and spongiomorphis (such as sphinctozoans and archaeocyathans) based on re-evaluation of type materials and evidence. It is also a practical guide to sponge identification providing descriptions and illustrations of characters and interpretation of their importance to systematics. Systema Porifera addresses many long standing nomenclatural problems and provides a sound baseline for future debate on sponges and their place in time and space. Systema Porifera describes 3 classes, 7 subclasses, 24 orders, 127 families and 682 valid genera of extant sponges (with over 1600 nominal generic names and an additional 500 invalid names treated). Treatment of the fossil fauna is less comprehensive or critical, although 6 classes, 30 orders, 245 families and 998 fossil genera are mentioned. Keys to all recent and many fossil taxa are provided.
Author : Geological Survey of Western Australia
Publisher :
Page : 80 pages
File Size : 34,85 MB
Release : 1986
Category : Geology
ISBN :
Author : George R. McGhee
Publisher : Columbia University Press
Page : 338 pages
File Size : 35,31 MB
Release : 1996
Category : Computers
ISBN : 9780231075053
Based on two decades of research, The Late Devonian Mass Extinction reviews the many theories that have been presented to explain the global mass extinction that struck the earth over 367 million years ago, considering in particular the possibility that the extinction was triggered by multiple impacts of extraterrestrial objects.
Author : J. Keith Rigby
Publisher : Geological Survey of Canada
Page : 82 pages
File Size : 11,66 MB
Release : 1989
Category : Science
ISBN :
This report describes one of the most diverse Silurian sponge faunas known in North America. The fossils are from the Cape Phillips Formation on Baillie-Hamilton and Cornwallis islands, and are part of the distinct biogeographic realm that stretches north and west of the Transcontinental Arch. The fossils were obtained from both allochthonous and autochthonous beds that represent slope or basin margin environments of the Franklinian Geosyncline. It describes 5 new genera and 19 new species.
Author : Jeff Over
Publisher : Elsevier
Page : 343 pages
File Size : 46,73 MB
Release : 2005-12-02
Category : Science
ISBN : 0080457843
The Late Devonian and Permian-Triassic intervals are among the most dynamic episodes of Earth history, marked by large secular changes in continental ecosystems, dramatic fluctuations in ocean oxygenation, major phases of biotic turnover, volcanism, bolide impact events, and rapid fluctuations in stable isotope systems and sea level. This volume highlights contributions from a broad range of geological sub-disciplines currently striving to understand these critical intervals of geologically rapid, global-scale changes.* Provides updated, current models for the mid-Late Devonian and Permian-Triassic mass extinction episodes* Highlights several new analytical approaches for developing quantitative datasets* Takes an integrated approach presenting datasets from a broad range of sub-disciplines
Author : Felix Wiedenmayer
Publisher :
Page : 160 pages
File Size : 18,87 MB
Release : 1994
Category : Demospongiae, Fossil
ISBN :
Zus.fg. auf engl. und deutsch.