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Conodont faunas with Lenodus variabilis in the upper Arenigian to lower Llanvirnian of Sweden

Löfgren, Anita LU (2003) In Acta Palaeontologica Polonica 48(3). p.417-436
Abstract
Lenodus variabilis occurs in an interval in the lower to middle Kundan Stage which includes the Arenig-Llanvirn boundary. The lower part of its range constitutes the L. variabilis Zone, the upper part, where it co-occurs with Yangtze-placognathus crassus, making up the Y. crassus Zone. The conodont faunas of these two consecutive conodont biozones have been investigated in 14 sections from south, south-central and central Sweden, the faunal differences between the areas being mainly expressed in shifts in relative abundance. The taxon which is generally the most abundant, Baltoniodus, has comparable abundance maxima at localities representing shallow parts of the basin as well as in deeper parts, indicating that some environmental factor... (More)
Lenodus variabilis occurs in an interval in the lower to middle Kundan Stage which includes the Arenig-Llanvirn boundary. The lower part of its range constitutes the L. variabilis Zone, the upper part, where it co-occurs with Yangtze-placognathus crassus, making up the Y. crassus Zone. The conodont faunas of these two consecutive conodont biozones have been investigated in 14 sections from south, south-central and central Sweden, the faunal differences between the areas being mainly expressed in shifts in relative abundance. The taxon which is generally the most abundant, Baltoniodus, has comparable abundance maxima at localities representing shallow parts of the basin as well as in deeper parts, indicating that some environmental factor other than water depth has influenced its distribution. Drepanodus and Protopanderodus rectus prefer areas representing deeper parts of the epicontinental sea. Scalpellodus is most abundant at the sites representing intermediate depths. Semiacontiodus cornuformis was adapted to shallow water and is lacking at levels representing maximum depths, but at some places (for instance in Skane) it is replaced by Semiacontiodus davidi. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Llanvirnian, Arenigian, ecology, biofacies, conodonts, biostratigraphy, Sweden
in
Acta Palaeontologica Polonica
volume
48
issue
3
pages
417 - 436
publisher
Instytut Paleobiologii PAN
external identifiers
  • wos:000185610600009
  • scopus:17544388319
ISSN
0567-7920
language
English
LU publication?
yes
id
82df471e-6b1b-43f8-8ea0-d829d6afc1cf (old id 299967)
alternative location
http://www.app.pan.pl/acta48/app48-417.pdf
date added to LUP
2007-09-17 15:17:03
date last changed
2018-10-14 04:12:11
@article{82df471e-6b1b-43f8-8ea0-d829d6afc1cf,
  abstract     = {Lenodus variabilis occurs in an interval in the lower to middle Kundan Stage which includes the Arenig-Llanvirn boundary. The lower part of its range constitutes the L. variabilis Zone, the upper part, where it co-occurs with Yangtze-placognathus crassus, making up the Y. crassus Zone. The conodont faunas of these two consecutive conodont biozones have been investigated in 14 sections from south, south-central and central Sweden, the faunal differences between the areas being mainly expressed in shifts in relative abundance. The taxon which is generally the most abundant, Baltoniodus, has comparable abundance maxima at localities representing shallow parts of the basin as well as in deeper parts, indicating that some environmental factor other than water depth has influenced its distribution. Drepanodus and Protopanderodus rectus prefer areas representing deeper parts of the epicontinental sea. Scalpellodus is most abundant at the sites representing intermediate depths. Semiacontiodus cornuformis was adapted to shallow water and is lacking at levels representing maximum depths, but at some places (for instance in Skane) it is replaced by Semiacontiodus davidi.},
  author       = {Löfgren, Anita},
  issn         = {0567-7920},
  keyword      = {Llanvirnian,Arenigian,ecology,biofacies,conodonts,biostratigraphy,Sweden},
  language     = {eng},
  number       = {3},
  pages        = {417--436},
  publisher    = {Instytut Paleobiologii PAN},
  series       = {Acta Palaeontologica Polonica},
  title        = {Conodont faunas with Lenodus variabilis in the upper Arenigian to lower Llanvirnian of Sweden},
  volume       = {48},
  year         = {2003},
}