Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships

Abstract. The Hirnantian Glisstjarn Formation (Normalograptus persculptus graptolite Biozone) is a succession of limestones and shales onlapping the Katian Boda Limestone in the Siljan District, Sweden. It contains a conspicuous, up to several decimeter thick bed densely packed with bipolarly oriented, orthoconic cephalopod conchs that can reach lengths of more than 120 cm. Conch fragmentation, bioereosion and the generally poor preservation of the conchs indicate time averaging and the conchs are tentatively interpreted as beached, and a result of winnowing. Ten nautiloid species were collected from the Glisstjarn Formation of which five are new: Dawsonoceras gregarium n. sp., Discoceras siljanense n. sp., Isorthoceras dalecarlense n. sp., Retizitteloceras rarum gen. et sp. n., and Transorthoceras osmundsbergense gen. et sp. n. The non-endemic taxa in most cases are known from elsewhere in Baltoscandia, except one species which is known from Siberia, and North America respectively. Proteocerid orthoceridans dominate the association, of which T. osmundsbergense is the predominant species. Oncocerids are diverse but together with tarphycerids very rare. Notable is the lack of many higher taxa, that are typical for other Late Ordovician shallow water depositional settings. Based on the taxonomical composition of the cephalopod mass occurrence it is interpreted as an indicator of eutrophication of the water masses in the area. doi: 10.1002/mmng.201000014

• Publication year

  2011

• Venue

  Fossil Record

• Publication date

  2011-02-01

• Fields of study

  Geology

• Identifiers
  DOI 10.1002/MMNG.201000014
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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  2011cited by this paper
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  2010cited by this paper
• The Origin and Initial Rise of Pelagic Cephalopods in the Ordovician

  2009cited by this paper
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  2008cited by this paper
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  2008cited by this paper
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  2007cited by this paper
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  2007cited by this paper
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  2007cited by this paper
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  2007cited by this paper
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  2007cited by this paper
• First record of the Hirnantian (Upper Ordovician) δ13C excursion in the North American Midcontinent and its regional implications

  2006influential reference
• Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician

  2006cited by this paper
• Morphological pathways in the evolution of Early and Middle Devonian ammonoids

  2003cited by this paper
• Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio

  1995influential reference
• Upper Ordovician (Harjuan) oncoceratid nautiloids from the Boda Limestone, Siljan District, Sweden

  1987cited by this paper
• The Middle Ordovician of the Oslo region, Norway, 32. Trilobites of the family Remopleurididae

  1982cited by this paper
• Upper Ordovician (Harjuan) nautiloid cephalopods from the Boda Limestone of Sweden

  1982cited by this paper
• Fossil communities of the lower Trenton Group (middle Ordovician) of central and northwestern New York State

  1976cited by this paper
• Stratigraphy and Paleoecology of the Saluda Formation (Cincinnatian) in Indiana, Ohio, and Kentucky

  1968cited by this paper
• Catalog of the type specimens of invertebrate fossils

  1968cited by this paper
• A classification of the Nautiloidea

  1950cited by this paper
• Brachiopoda of the Ottawa Formation of the Ottawa - St. Lawrence Lowland

  1946cited by this paper
• Paläozoologie in Tabellen

  1940influential reference
• Über den Brachiopodenschiefer und den jüngeren Riffkalk in Dalarne

  1935cited by this paper
• Catalogue of the Fossil Cephalopoda in the British Museum (Natural History)

  1935cited by this paper
• Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums

  1930influential reference
• The Lower Silurian Cephalopoda of Minnesota

  1897cited by this paper
• Cambrian and Ordovician

  year unknowncited by this paper
• The mineral conchology of Great Britain

  year unknowncited by this paper
• Die Fossile Fauna der Silurischen Diluvial-Geschiebe von Sandewitz bei Oels in Nieder-Schlesien : eine Palaeontologische Monographie

  year unknowncited by this paper
• The Lower Siluric shales of the Mohawk valley, by Rudolf Ruedemann.

  year unknowncited by this paper
• Ordovician fossils of north China

  year unknowncited by this paper
• Histoire naturelle des vers

  year unknowncited by this paper
• Prodrome de paléontologie stratigraphique universelle des animaux mollusques & rayonnés : faisant suite au cours élémentaire de paléontologie et de géologie stratigraphiques

  year unknowncited by this paper
• Lethaea Rossica ou Paléontologie de la Russie

  year unknowncited by this paper
• The utica and lorraine formations of New York

  year unknowncited by this paper
• Report on the Geology of the county of Londonderry, and of Tyrone and Fermanagh

  year unknowncited by this paper
• The American Palaeozoic fossils: a catalogue of the genera and species, with names of authors, dates, places of publication, groups of rocks in which found, and the etymology and signification of the

  year unknowncited by this paper
• Histoire naturelle des vers contenant leur description et leurs moeurs, avec figures dessinées d'après nature /

  year unknowncited by this paper
• Catalogue of Fossil Cephalopoda in the British Museum (Natural History)

  year unknowncited by this paper

• The genus Discoceras (Tarphyceratida, Cephalopoda; Ordovician) from Estonia and glacial erratics in north-central Europe

  2026cites this paper
• Late Ordovician cephalopods from Morocco and their implications

  2025cites this paper
• Taphonomic and reworking processes isolating cephalopod septa and chamber fillings

  2025cites this paper
• The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia

  2025cites this paper
• Rare finds of the coiled cephalopod Discoceras from the Upper Ordovician of Bornholm, Denmark

  2025cites this paper
• Early ontogeny and distribution of the orthocerid cephalopod Calorthoceras Chen, 1981 - taxonomic and palaeoecological implications

  2024cites this paper
• Accumulations of Fossil Cephalopod Shells and Attached Epizoans from Some Late Ordovician Localities (Barrandian Area, Czech Republic)

  2023cites this paper
• Cephalopod accumulations from the Late Ordovician of Cumbria: Mud mounds and stromatolites

  2021cites this paper
• First report of Mid Ordovician (Darriwilian) cephalopods from the Saluk Mountains, southern Kopet-Dagh Region, north-east Iran

  2021cites this paper
• Early ontogenetic growth stages of Middle Ordovician orthoceratoid cephalopods from Bohemia

  2020cites this paper
• Ordovician Orthocerida and Pseudorthocerida (Cephalopoda: Nautiloidea) from the Lower Setul Limestone of the Langkawi Islands, Malaysia

  2020cites this paper
• Silurian tarphycerid Discoceras (Cephalopoda, Nautiloidea): systematics, embryonic development and paleoecology

  2018influential citation
• Terminal Ordovician stratigraphy of the Siljan district, Sweden

  2015cites this paper
• Late Ordovician cephalopods, tentaculitides, machaeridians and echinoderms from Kuh-e Faraghan, High Zagros, Iran

  2015influential citation
• Palaeoecology and palaeogeography of Late Ordovician (Katian–Hirnantian) cephalopods of the Boda Limestone, Siljan district, Sweden

  2014cites this paper
• The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden

  2013cites this paper
• Chapter 27 Cambrian–Ordovician cephalopod palaeogeography and diversity

  2013influential citation