The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Per Ahlberg

Per Ahlberg

Professor emeritus

Per Ahlberg

Lotagnostus? : mystacinus, a rare agnostid from the Upper Cambrian of Sweden

Author

  • Per Ahlberg
  • John Ahlgren

Summary, in English

Agnostids afford the best means of correlating Cambrian strata, and they are widely used for intercontinental correlations. They are most common in open-marine deposits and reached a maximum diversity during the Middle and early Late Cambrian. About twenty species of agnostids are known from the Upper Cambrian of Scandinavia. Lotagnostus? mystacinus Tjernvik, 1953 is a rare agnostid from the Upper Cambrian Agnostus pisiformis Zone of south-central Sweden. It is redescribed following examination of the holotype and an additional pygidium. The outline and morphology of especially the pygidial posteroaxis, which is distinctly trilobate by a pair of deep notular furrows, suggest that the species is best classified as a species of Lotagnostus. If correctly assigned to Lotagnostus, it would be the oldest known species of that genus.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2000

Language

English

Pages

91-96

Publication/Series

Acta Palaeontologica Polonica

Volume

45

Issue

1

Document type

Journal article

Publisher

Instytut Paleobiologii PAN

Topic

  • Geology

Keywords

  • cambrian
  • morphology
  • phylogeny
  • taxonomy
  • Sweden
  • Agnostida
  • Trilobita

Status

Published

ISBN/ISSN/Other

  • ISSN: 0567-7920