The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity

Björn Kröger, Martina Aubrechtová

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The cephalopods collected from the mud mounds of the Kullsberg Limestone Formation, late Sandbian-earliest Katian(?), south central Sweden, are highly diverse and comprise 26 identifiable species of 12 families and six orders in a sample of c. 180 specimens. The assemblage is strongly dominated by orthocerids in abundance and diversity. In contrast, the time-equivalent assemblage of the reef limestone of the Vasalemma Formation of Estonia is dominated by actinocerids and less diverse. Only one-third of the species co-occur in these two palaeogeographically relatively close assemblages. The taxonomic composition of the Kullsberg assemblage is, on the order level, more similar to that of the late Katian-early Hirnantian Boda Limestone Formation of south central Sweden, which represents a similar relatively deep depositional environment. The high local differentiation of cephalopod reef faunas exemplifies the importance of the emergent Baltic reef habitats in diversification processes during the early Late Ordovician. Of the described taxa, the following are new: Beloitoceras thorslundi sp. nov., Cameroceras motsognir sp. nov., Clothoceras thornquisti gen. et sp. nov., Danoceras skalbergensis sp. nov., Discoceras amtjaernense sp. nov., D. nilssoni sp. nov., Endoceras naekki sp. nov., Furudaloceras tomtei gen. et sp. nov., Isbergoceras consobrinum gen. et sp. nov., I. niger gen. et sp. nov., Isorthoceras nikwis sp. nov., I. sylphide sp. nov., I. urdr sp. nov., I. verdandi sp. nov., Kullsbergoceras nissei gen. et sp. nov., Ordogeisonoceras uppsalaensis sp. nov. and Valkyrioceras dalecarlia gen et sp. nov.

Original languageEnglish
JournalJournal of Systematic Palaeontology
Volume17
Issue number12
Pages (from-to)961-995
Number of pages35
ISSN1477-2019
DOIs
Publication statusPublished - 18 Jun 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • AGE
  • BIODIVERSITY
  • BODA LIMESTONE
  • BRACHIOPOD FAUNAS
  • EVOLUTION
  • Great Ordovician Biodiversification Event (GOBE)
  • Guttenberg Carbon Isotope Excursion (GICE)
  • Katian Stage
  • MIDDLE
  • SILJAN DISTRICT
  • STRATIGRAPHY
  • Sandbian Stage
  • bioherm
  • palaeogeography
  • 1171 Geosciences
  • 1181 Ecology, evolutionary biology

Cite this

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title = "The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity",
abstract = "The cephalopods collected from the mud mounds of the Kullsberg Limestone Formation, late Sandbian-earliest Katian(?), south central Sweden, are highly diverse and comprise 26 identifiable species of 12 families and six orders in a sample of c. 180 specimens. The assemblage is strongly dominated by orthocerids in abundance and diversity. In contrast, the time-equivalent assemblage of the reef limestone of the Vasalemma Formation of Estonia is dominated by actinocerids and less diverse. Only one-third of the species co-occur in these two palaeogeographically relatively close assemblages. The taxonomic composition of the Kullsberg assemblage is, on the order level, more similar to that of the late Katian-early Hirnantian Boda Limestone Formation of south central Sweden, which represents a similar relatively deep depositional environment. The high local differentiation of cephalopod reef faunas exemplifies the importance of the emergent Baltic reef habitats in diversification processes during the early Late Ordovician. Of the described taxa, the following are new: Beloitoceras thorslundi sp. nov., Cameroceras motsognir sp. nov., Clothoceras thornquisti gen. et sp. nov., Danoceras skalbergensis sp. nov., Discoceras amtjaernense sp. nov., D. nilssoni sp. nov., Endoceras naekki sp. nov., Furudaloceras tomtei gen. et sp. nov., Isbergoceras consobrinum gen. et sp. nov., I. niger gen. et sp. nov., Isorthoceras nikwis sp. nov., I. sylphide sp. nov., I. urdr sp. nov., I. verdandi sp. nov., Kullsbergoceras nissei gen. et sp. nov., Ordogeisonoceras uppsalaensis sp. nov. and Valkyrioceras dalecarlia gen et sp. nov.",
keywords = "AGE, BIODIVERSITY, BODA LIMESTONE, BRACHIOPOD FAUNAS, EVOLUTION, Great Ordovician Biodiversification Event (GOBE), Guttenberg Carbon Isotope Excursion (GICE), Katian Stage, MIDDLE, SILJAN DISTRICT, STRATIGRAPHY, Sandbian Stage, bioherm, palaeogeography, 1171 Geosciences, 1181 Ecology, evolutionary biology",
author = "Bj{\"o}rn Kr{\"o}ger and Martina Aubrechtov{\'a}",
year = "2019",
month = "6",
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language = "English",
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The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity. / Kröger, Björn; Aubrechtová, Martina.

In: Journal of Systematic Palaeontology, Vol. 17, No. 12, 18.06.2019, p. 961-995.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity

AU - Kröger, Björn

AU - Aubrechtová, Martina

PY - 2019/6/18

Y1 - 2019/6/18

N2 - The cephalopods collected from the mud mounds of the Kullsberg Limestone Formation, late Sandbian-earliest Katian(?), south central Sweden, are highly diverse and comprise 26 identifiable species of 12 families and six orders in a sample of c. 180 specimens. The assemblage is strongly dominated by orthocerids in abundance and diversity. In contrast, the time-equivalent assemblage of the reef limestone of the Vasalemma Formation of Estonia is dominated by actinocerids and less diverse. Only one-third of the species co-occur in these two palaeogeographically relatively close assemblages. The taxonomic composition of the Kullsberg assemblage is, on the order level, more similar to that of the late Katian-early Hirnantian Boda Limestone Formation of south central Sweden, which represents a similar relatively deep depositional environment. The high local differentiation of cephalopod reef faunas exemplifies the importance of the emergent Baltic reef habitats in diversification processes during the early Late Ordovician. Of the described taxa, the following are new: Beloitoceras thorslundi sp. nov., Cameroceras motsognir sp. nov., Clothoceras thornquisti gen. et sp. nov., Danoceras skalbergensis sp. nov., Discoceras amtjaernense sp. nov., D. nilssoni sp. nov., Endoceras naekki sp. nov., Furudaloceras tomtei gen. et sp. nov., Isbergoceras consobrinum gen. et sp. nov., I. niger gen. et sp. nov., Isorthoceras nikwis sp. nov., I. sylphide sp. nov., I. urdr sp. nov., I. verdandi sp. nov., Kullsbergoceras nissei gen. et sp. nov., Ordogeisonoceras uppsalaensis sp. nov. and Valkyrioceras dalecarlia gen et sp. nov.

AB - The cephalopods collected from the mud mounds of the Kullsberg Limestone Formation, late Sandbian-earliest Katian(?), south central Sweden, are highly diverse and comprise 26 identifiable species of 12 families and six orders in a sample of c. 180 specimens. The assemblage is strongly dominated by orthocerids in abundance and diversity. In contrast, the time-equivalent assemblage of the reef limestone of the Vasalemma Formation of Estonia is dominated by actinocerids and less diverse. Only one-third of the species co-occur in these two palaeogeographically relatively close assemblages. The taxonomic composition of the Kullsberg assemblage is, on the order level, more similar to that of the late Katian-early Hirnantian Boda Limestone Formation of south central Sweden, which represents a similar relatively deep depositional environment. The high local differentiation of cephalopod reef faunas exemplifies the importance of the emergent Baltic reef habitats in diversification processes during the early Late Ordovician. Of the described taxa, the following are new: Beloitoceras thorslundi sp. nov., Cameroceras motsognir sp. nov., Clothoceras thornquisti gen. et sp. nov., Danoceras skalbergensis sp. nov., Discoceras amtjaernense sp. nov., D. nilssoni sp. nov., Endoceras naekki sp. nov., Furudaloceras tomtei gen. et sp. nov., Isbergoceras consobrinum gen. et sp. nov., I. niger gen. et sp. nov., Isorthoceras nikwis sp. nov., I. sylphide sp. nov., I. urdr sp. nov., I. verdandi sp. nov., Kullsbergoceras nissei gen. et sp. nov., Ordogeisonoceras uppsalaensis sp. nov. and Valkyrioceras dalecarlia gen et sp. nov.

KW - AGE

KW - BIODIVERSITY

KW - BODA LIMESTONE

KW - BRACHIOPOD FAUNAS

KW - EVOLUTION

KW - Great Ordovician Biodiversification Event (GOBE)

KW - Guttenberg Carbon Isotope Excursion (GICE)

KW - Katian Stage

KW - MIDDLE

KW - SILJAN DISTRICT

KW - STRATIGRAPHY

KW - Sandbian Stage

KW - bioherm

KW - palaeogeography

KW - 1171 Geosciences

KW - 1181 Ecology, evolutionary biology

U2 - 10.1080/14772019.2018.1491899

DO - 10.1080/14772019.2018.1491899

M3 - Article

VL - 17

SP - 961

EP - 995

JO - Journal of Systematic Palaeontology

JF - Journal of Systematic Palaeontology

SN - 1477-2019

IS - 12

ER -