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Sphenothallus from the Furongian (Cambrian) of Scandinavia

Author:
  • Sarah Elizabeth Stewart
  • Euan Neilson Kerr Clarkson
  • John Ahlgren
  • Per Ahlberg
  • Brigitte Schoenemann
Publishing year: 2015
Language: English
Pages: 20-24
Publication/Series: GFF
Volume: 137
Issue: 1
Document type: Journal article
Publisher: Taylor & Francis

Abstract english

Sphenothallus, a Palaeozoic genus of uncertain affinity, possibly a hydrozoan, is reported from the Furongian (Cambrian) of Scandinavia. This is the only known occurrence of the genus in Cambrian rocks outside of China, western North America and Bohemia, and also the first report of Sphenothallus in the Cambrian-Ordovician of Baltica. The material is from the upper Furongian (upper Protopeltura and lower Peltura superzones) of Mount Kinnekulle, Vastergotland, south-central Sweden. It consists of elongated, slightly tapering, shiny black phosphatic tubules. Scanning electron microscope photographs confirm paired internal longitudinal thickenings, typical of the genus, on opposite sides of the central lumen. The presence of the Swedish material in a low-energy, dysoxic facies is consistent with most previous occurrences.

Keywords

  • Geology
  • Sweden
  • Sphenothallus
  • Cambrian
  • Vastergotland
  • Alum Shale Formation
  • Furongian

Other

Published
  • ISSN: 2000-0863
Per Ahlberg
E-mail: per [dot] ahlberg [at] geol [dot] lu [dot] se

Professor

Lithosphere and Biosphere Science

+46 46 222 78 70

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