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Late Cretaceous (Campanian) actinopterygian fishes from the Kristianstad Basin of southern Sweden

Bazzi, Mohamad; Einarsson, Elisabeth LU and Kear, Benjamin P. (2016) In Geological Society Special Publication 434. p.277-292
Abstract

Although a diverse range of aquatic vertebrates are documented from the Upper Cretaceous (mid-Campanian) marine strata of the Kristianstad Basin in southern Sweden, only chondrichthyans and marine amniotes have been described in detail to date. In contrast, coeval actinopterygians are virtually unreported, yet their remains are extremely abundant at most sampled localities. A comprehensive assessment of these fossils has identified the first Late Cretaceous actinopterygian fauna from the Fennoscandian Shield, incorporating indeterminate lepisosteids, the durophagous pycnodontid Anomoeodus subclavatus, the predatory pachycormid Protosphyraena sp., a large ichthyodectid, pachyrhizodontids resembling Pachyrhizodus, the enchodontid Enchodus... (More)

Although a diverse range of aquatic vertebrates are documented from the Upper Cretaceous (mid-Campanian) marine strata of the Kristianstad Basin in southern Sweden, only chondrichthyans and marine amniotes have been described in detail to date. In contrast, coeval actinopterygians are virtually unreported, yet their remains are extremely abundant at most sampled localities. A comprehensive assessment of these fossils has identified the first Late Cretaceous actinopterygian fauna from the Fennoscandian Shield, incorporating indeterminate lepisosteids, the durophagous pycnodontid Anomoeodus subclavatus, the predatory pachycormid Protosphyraena sp., a large ichthyodectid, pachyrhizodontids resembling Pachyrhizodus, the enchodontid Enchodus cf. gladiolus and indeterminate small teleosts. These taxa are diagnosed mainly from isolated teeth and scales, implying substantial taphonomic loss prior to burial. Moreover, the prolific recovery of actinopterygian skeletal remnants in recent excavations suggests that historical collecting biases, rather than ecological paucity, have contributed to their under-representation in the Swedish Cretaceous record. Palaeobiogeographically, the Kristianstad Basin actinopterygians show compositional resemblance to assemblages from the Northern European Platform and the Western Interior Seaway of North America, advocating distributional communication across the Boreal proto-Atlantic Ocean.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Geological Society Special Publication
volume
434
pages
16 pages
publisher
Geological Society of London
external identifiers
  • scopus:84969922399
ISSN
0305-8719
DOI
10.1144/SP434.5
language
English
LU publication?
yes
id
da6b9dd8-6ffb-45aa-90e9-95a01d28ea9f
date added to LUP
2016-08-12 11:25:48
date last changed
2017-01-01 08:33:48
@article{da6b9dd8-6ffb-45aa-90e9-95a01d28ea9f,
  abstract     = {<p>Although a diverse range of aquatic vertebrates are documented from the Upper Cretaceous (mid-Campanian) marine strata of the Kristianstad Basin in southern Sweden, only chondrichthyans and marine amniotes have been described in detail to date. In contrast, coeval actinopterygians are virtually unreported, yet their remains are extremely abundant at most sampled localities. A comprehensive assessment of these fossils has identified the first Late Cretaceous actinopterygian fauna from the Fennoscandian Shield, incorporating indeterminate lepisosteids, the durophagous pycnodontid Anomoeodus subclavatus, the predatory pachycormid Protosphyraena sp., a large ichthyodectid, pachyrhizodontids resembling Pachyrhizodus, the enchodontid Enchodus cf. gladiolus and indeterminate small teleosts. These taxa are diagnosed mainly from isolated teeth and scales, implying substantial taphonomic loss prior to burial. Moreover, the prolific recovery of actinopterygian skeletal remnants in recent excavations suggests that historical collecting biases, rather than ecological paucity, have contributed to their under-representation in the Swedish Cretaceous record. Palaeobiogeographically, the Kristianstad Basin actinopterygians show compositional resemblance to assemblages from the Northern European Platform and the Western Interior Seaway of North America, advocating distributional communication across the Boreal proto-Atlantic Ocean.</p>},
  author       = {Bazzi, Mohamad and Einarsson, Elisabeth and Kear, Benjamin P.},
  issn         = {0305-8719},
  language     = {eng},
  pages        = {277--292},
  publisher    = {Geological Society of London},
  series       = {Geological Society Special Publication},
  title        = {Late Cretaceous (Campanian) actinopterygian fishes from the Kristianstad Basin of southern Sweden},
  url          = {http://dx.doi.org/10.1144/SP434.5},
  volume       = {434},
  year         = {2016},
}