The Early Cambrian Fauna of North-East Greenland

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Skovsted, Christian B.,1974-Uppsala universitet,Institutionen för geovetenskaper (författare)

The Early Cambrian Fauna of North-East Greenland

BokEngelska2003

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Uppsala :Institutionen för geovetenskaper,2003
22 s.
electronicrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:uu-3910
ISBN:9150617311
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3910URI

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Språk:engelska
Sammanfattning på:engelska

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Varianttitlar

Den tidigkambriska faunan från Nordöstgrönland

Anmärkningar

Small shelly fossils are common in sediments of Early Cambrian age and include the earliest common representatives of metazoan animals with mineralized hard parts. The group includes fossils of very different morphology, composition and ultrastructure. They seem to represent skeletal remains of numerous animal groups, the biological affinities of which are largely unresolved. However, the wide geographic range of many forms has the potential to enhance biostratigraphic and palaeogeographic resolution in the Early Cambrian. The late Early Cambrian sequence of North-East Greenland has yielded an assemblage of more than 88 species of small shelly fossils, brachiopods and trilobites, indicative of a middle Dyeran age (Botoman equivalent). The recovered fossils include a number of species that are known from other Early Cambrian palaeocontinents, and particularly strong ties to late Early Cambrian faunas of Australia are documented. The many cosmopolitan taxa thus identified suggests a close juxtaposition of palaeocontinents at this time. The systematic affinity of many of these small shelly fossils is poorly understood, partly because of their fragmentary nature and poor preservation. However, new data from North-East Greenland improves our understanding of the function and biological affinity of certain taxa. Collections of the problematic fossil Mongolitubulus from North and North-East Greenland exhibit characters indicative of a defensive function as spines of bivalved arthropods, while species of the problematic genus Triplicatella represent the opercula of an unknown tubular shell, probably related to orthothecid hyoliths. The bivalved fossil Mickwitzia from North-East Greenland combines characters of linguliform brachiopods and sclerites of Micrina, a non-bivalved problematic form (halkieriid) from Australia. The combination suggests that Mickwitzia is a stem group brachiopod and strengthens arguments for a halkieriid ancestry of the brachiopod phylum.

Ämnesord och genrebeteckningar

NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
Earth sciences
Early Cambrian
Dyeran
Botoman
Biostratigraphy
Palaeogeography
Small Shelly Fossils
Brachiopoda
Mollusca
Hyolitha
Trilobita
Geovetenskap
Earth sciences
Geovetenskap

Biuppslag (personer, institutioner, konferenser, titlar ...)

Peel, John S. (preses)
Holmer, Lars E. (preses)
Geyer, Gerd,ProfessorInstitut für Paläontologie, Universität Würtzburg, Würtzburg (opponent)
Uppsala universitetInstitutionen för geovetenskaper (creator_code:org_t)

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Av författaren/redakt...: Skovsted, Christ ...; Peel, John S.; Holmer, Lars E.; Geyer, Gerd, Pro ...

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Av lärosätet: Uppsala universitet

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