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A blind trilobite with Baltic affinities from Cambrian Series 3 of the Iberian Chains, Spain, and its stratigraphical and palaeobiogeographical significance

Author:
  • Juan B. Chirivella Martorell
  • Eladio Linan
  • Per Ahlberg
  • Rodolfo Gozalo
Publishing year: 2015
Language: English
Pages: 175-180
Publication/Series: GFF
Volume: 137
Issue: 3
Document type: Journal article
Publisher: Taylor & Francis

Abstract english

Three cranidia of a conocoryphid trilobite are described from the lower Caesaraugustan Regional Stage (upper part of provisional Cambrian Stage 5 within Cambrian Series 3) in the Iberian Chains, Spain. The material is from the upper part of the Mansilla Formation and the base of the overlying Murero Formation. It closely resembles Bailiella tenuicincta (Linnarsson, 1879), which has previously been described from the Ptychagnostus gibbus (Cambrian Stage 5) and lower P. atavus zones (lower Drumian Stage) of Baltica (Sweden and Bornholm), and from the P. atavus Zone of West Avalonia (Newfoundland). The record of B. cf. tenuicincta from the Mediterranean margin of West Gondwana provides additional evidence for considering the Acado-Baltic region a discrete biogeographical province, at least during the Cambrian 5 and Drumian ages.

Keywords

  • Geology
  • Trilobites
  • Conocoryphidae
  • systematics
  • correlation
  • palaeobiogeography
  • middle Cambrian
  • Iberian Chains
  • Spain

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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