Advanced

Darriwilian (Middle Ordovician) worms of southern Sweden

Eriksson, Mats E. LU ; Lindskog, Anders LU ; Servais, Thomas; Hints, Olle and Tonarová, Petra (2016) In GFF 138(4). p.502-509
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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Middle Ordovician, orthoceratite limestone, polychaetes, priapulids, scolecodonts, Sweden
in
GFF
volume
138
issue
4
pages
8 pages
publisher
Geological Society of Sweden
external identifiers
  • scopus:84976254500
  • wos:000386159900004
ISSN
1103-5897
DOI
10.1080/11035897.2016.1181102
language
English
LU publication?
yes
id
f955e1f5-0c76-48cb-a2bd-6b645f953d7a
date added to LUP
2016-11-01 14:41:57
date last changed
2017-10-08 04:54:05
@article{f955e1f5-0c76-48cb-a2bd-6b645f953d7a,
  abstract     = {<p>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.</p>},
  author       = {Eriksson, Mats E. and Lindskog, Anders and Servais, Thomas and Hints, Olle and Tonarová, Petra},
  issn         = {1103-5897},
  keyword      = {Middle Ordovician,orthoceratite limestone,polychaetes,priapulids,scolecodonts,Sweden},
  language     = {eng},
  month        = {10},
  number       = {4},
  pages        = {502--509},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {Darriwilian (Middle Ordovician) worms of southern Sweden},
  url          = {http://dx.doi.org/10.1080/11035897.2016.1181102},
  volume       = {138},
  year         = {2016},
}