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Fossils and Strata, Number 60, A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden V 60 (Paperback, 60 Revised Edition)
Loot Price: R542
Discovery Miles 5 420
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Fossils and Strata, Number 60, A New Silurian (Llandovery, Telychian) Sponge Assemblage from Gotland, Sweden V 60 (Paperback, 60 Revised Edition)
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Loot Price R542
Discovery Miles 5 420
Expected to ship within 12 - 17 working days
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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.
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