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Anders Lindskog

Anders Lindskog

Postdoc

Anders Lindskog

Darriwilian (Middle Ordovician) worms of southern Sweden

Författare

  • Mats E. Eriksson
  • Anders Lindskog
  • Thomas Servais
  • Olle Hints
  • Petra Tonarová

Summary, in English

The record of scolecodonts (polychaete jaws) from the Ordovician of Sweden is very poor. In this paper, we document a Darriwilian (Middle Ordovician) assemblage recovered from palynological samples from the “orthoceratite limestone” (Lanna and Holen limestones) of Mount Kinnekulle, Västergötland, southern Sweden. The collection of diminutive specimens forms an assemblage taxonomically composed mainly of simple placognath (mochtyellids, xanioprionids) and ctenognath (tetraprionids) taxa, whereas labidognaths (polychaetaspids) and taxa with other evolutionary grade-type apparatuses are very rare or absent. In addition, putative priapulid (penis worm) teeth were identified, possibly representing the first fossil representatives recorded in Sweden. The highest scolecodont abundance coincides with the lower to middle part of the “Täljsten” interval (lower Kunda Baltoscandian Stage). These strata are interpreted as having been formed during a marked regressional phase, suggesting that the palaeobathymetry and/or bottom substrate was optimal for polychaete colonization at that time. This new assemblage from Kinnekulle adds to the global scolecodont record in which data on Middle Ordovician and older specimens are still rudimentary but of importance for understanding early polychaete phylogeny.

Avdelning/ar

  • Berggrundsgeologi

Publiceringsår

2016-10-01

Språk

Engelska

Sidor

502-509

Publikation/Tidskrift/Serie

GFF

Volym

138

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Ämne

  • Geology

Nyckelord

  • Middle Ordovician
  • orthoceratite limestone
  • polychaetes
  • priapulids
  • scolecodonts
  • Sweden

Status

Published

Projekt

  • Early–Middle Ordovician biotic and sedimentary dynamics in the Baltoscandian paleobasin

ISBN/ISSN/Övrigt

  • ISSN: 1103-5897