Darriwilian (Middle Ordovician) worms of southern Sweden

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Lille University of Science and Technology
  • Tallinn University of Technology
  • Czech Geological Survey (CGS)
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Geologi

Nyckelord

Originalspråkengelska
Sidor (från-till)502-509
Antal sidor8
TidskriftGFF
Volym138
Utgivningsnummer4
StatusPublished - 2016 okt 1
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Anders Lindskog, 2017 feb, Lund: Lund University, Faculty of Science, Department of Geology, Lithosphere and Biosphere Science. 132 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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