A reappraisal of the lower Silurian brachiopods Borealis and Pentamerus

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A reappraisal of the lower Silurian brachiopods Borealis and Pentamerus

  • Volume / Part: 24 / 3
  • Publication Date: July 1981
  • Page(s): 537 - 553
  • Authored By: Atle Mørk

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The pentamerids Borealis borealis and Pentamerus oblongus are redescribed and a new subspecies B. borealis osloensis subsp. nov. is erected. Specimens from the virtually continuous Llandovery succession of the Oslo Region show a gradational evolution from B. borealis to P. oblongus, with a transition within the Idwian The occurrence of different evolutionary forms suggests a diachronous base for the limestone unit containin; these fossils in the Oslo Region. The recognition of this phyletic lineage may further improve the correlation to lower Silurian shelly faunas of the Oslo Region, Estonia, and Great Britain.

Palaeontology - Volume 24 Part 3 Pages 537-553



Palaeontology - Volume 24 Part 3 Pages 537-553

Citations

MØRK, A. 1981. A reappraisal of the lower Silurian brachiopods Borealis and Pentamerus. Palaeontology, 24, 3, 537–553.