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Isoxys (Arthropoda) from the Early Cambrian Sirius Passet Lagerstätte, North Greenland

Published online by Cambridge University Press:  20 May 2016

Mark Williams ,
David J. Siveter  and
John S. Peel
Mark Williams
Affiliation:
1Department of Geology, University of Leicester, Leicester LE1 7RH, England
David J. Siveter
Affiliation:
1Department of Geology, University of Leicester, Leicester LE1 7RH, England
John S. Peel
Affiliation:
2Department of Historical Geology and Palaeontology, University of Uppsala, Norbyvägen 22, S-752 36 Uppsala, Sweden
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Abstract

The marine offshore shelf mudstones of the Early Cambrian Buen Formation at Sirius Passet, North Greenland, contain a rich Konservat-Lagerstätte which includes abundant well-preserved material of the bivalved arthropod Isoxys volucris new species. The new material confirms Isoxys Walcott, 1890 as a component of the earliest arthropod faunas worldwide. Isoxys species are known from the Early Cambrian of Spain, Siberia, South Australia and Southwest China and also from the Early to Middle Cambrian of Laurentian North America. Isoxys occurs in the Redlichiid, Bigotinid and Olenellid trilobite faunal realms but is restricted to within tropical/subtropical regions, attesting to possible paleolatitudinal controls on its distribution. Isoxys resembles some phyllocarid and bradoriid arthropods but without knowledge of its soft-parts the affinity of the genus remains uncertain.

Type
Research Article
Information
Journal of Paleontology , Volume 70 , Issue 6 , November 1996 , pp. 947 - 954
Copyright
Copyright © The Paleontological Society 

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