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Tylosaurus ivoensis: a giant mosasaur from the early Campanian of Sweden

Lindgren, Johan LU and Siverson, Mikael LU (2002) In Transactions of the Royal Society of Edinburgh. Earth Sciences 93. p.73-93
Abstract
The nominal species Mosasaurus ivoensis from the latest early Campanian of the Kristianstad Basin in southern Sweden, is redescribed and assigned to the tylosaurine genus Tylosaurus on the basis of its dental and vertebral morphology. A partial skeleton (KUVP 1024) from the late Coniacian to earliest Campanian Smoky Hill Chalk Member of the Niobrara Formation in western Kansas, USA, was previously referred to 'M'. ivoensis. Nevertheless, its marginal teeth are markedly different, both in size and morphology, from those of topotypic T. ivoensis. Examination of type specimens and topotypic material of the nominal tylosaurines Hainosaurus pembinensis from the late early Campanian of Manitoba, Canada, H. gaudryi from the late Santonian or... (More)
The nominal species Mosasaurus ivoensis from the latest early Campanian of the Kristianstad Basin in southern Sweden, is redescribed and assigned to the tylosaurine genus Tylosaurus on the basis of its dental and vertebral morphology. A partial skeleton (KUVP 1024) from the late Coniacian to earliest Campanian Smoky Hill Chalk Member of the Niobrara Formation in western Kansas, USA, was previously referred to 'M'. ivoensis. Nevertheless, its marginal teeth are markedly different, both in size and morphology, from those of topotypic T. ivoensis. Examination of type specimens and topotypic material of the nominal tylosaurines Hainosaurus pembinensis from the late early Campanian of Manitoba, Canada, H. gaudryi from the late Santonian or early Campanian of northwestern France, and H. lonzeensis from the Coniacian or Santonian of Belgium, indicates that all three may be Tylosaurus. The utility of isolated tooth-crowns in mosasaur taxonomy has been hampered by the often poor quality of the published illustrations of these fossils in combination with poor stratigraphic control. All Swedish remains of T. ivoensis, including 172 marginal teeth, 6 pterygoid teeth, several jawbone fragments and 12 vertebrae, were collected from a narrow stratigraphic interval corresponding to the highest biozone in the German eight-fold division of the early Campanian, providing the first good insight into the intraspecific dental variation in a tylosaurine mosasaur. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
vertebrae, Hainosaurus, Cretaceous, Kristianstad, Mosasauridae, Skane, Mosasaurus, teeth
in
Transactions of the Royal Society of Edinburgh. Earth Sciences
volume
93
pages
73 - 93
publisher
Royal Society of Edinburgh
external identifiers
  • wos:000178960600005
  • scopus:0036407677
ISSN
0263-5933
language
English
LU publication?
yes
id
a92e5a45-5cc9-45a8-9dbc-3fde6286295d (old id 324366)
date added to LUP
2007-11-14 15:46:22
date last changed
2017-12-04 10:36:20
@article{a92e5a45-5cc9-45a8-9dbc-3fde6286295d,
  abstract     = {The nominal species Mosasaurus ivoensis from the latest early Campanian of the Kristianstad Basin in southern Sweden, is redescribed and assigned to the tylosaurine genus Tylosaurus on the basis of its dental and vertebral morphology. A partial skeleton (KUVP 1024) from the late Coniacian to earliest Campanian Smoky Hill Chalk Member of the Niobrara Formation in western Kansas, USA, was previously referred to 'M'. ivoensis. Nevertheless, its marginal teeth are markedly different, both in size and morphology, from those of topotypic T. ivoensis. Examination of type specimens and topotypic material of the nominal tylosaurines Hainosaurus pembinensis from the late early Campanian of Manitoba, Canada, H. gaudryi from the late Santonian or early Campanian of northwestern France, and H. lonzeensis from the Coniacian or Santonian of Belgium, indicates that all three may be Tylosaurus. The utility of isolated tooth-crowns in mosasaur taxonomy has been hampered by the often poor quality of the published illustrations of these fossils in combination with poor stratigraphic control. All Swedish remains of T. ivoensis, including 172 marginal teeth, 6 pterygoid teeth, several jawbone fragments and 12 vertebrae, were collected from a narrow stratigraphic interval corresponding to the highest biozone in the German eight-fold division of the early Campanian, providing the first good insight into the intraspecific dental variation in a tylosaurine mosasaur.},
  author       = {Lindgren, Johan and Siverson, Mikael},
  issn         = {0263-5933},
  keyword      = {vertebrae,Hainosaurus,Cretaceous,Kristianstad,Mosasauridae,Skane,Mosasaurus,teeth},
  language     = {eng},
  pages        = {73--93},
  publisher    = {Royal Society of Edinburgh},
  series       = {Transactions of the Royal Society of Edinburgh. Earth Sciences},
  title        = {Tylosaurus ivoensis: a giant mosasaur from the early Campanian of Sweden},
  volume       = {93},
  year         = {2002},
}