Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums

Teichert, Curt

doi:10.1007/bf03044452

Cited by 18 publications

(41 citation statements)

References 9 publications

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“…Herøya Formation, Norway (Strand 1934 Protophragmoceras sphinx -Teichert 1930: 270, 299-301, pl. 7, fig.…”

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

“…Upper Herøya Formation ("Gastropod Limestone"), Skien-Langesund district, Norway (Strand 1934); erratic limestone boulders from Vormsi/Pirgu Regional Stage, Zgierz, Poland (Dzik 1984); Vormsi/Pirgu Regional Stage ("Lyckholm stage"), Estonia (Teichert 1930); Molodov Horizon, Podolia (Balashov 1975); Johnstorp Formation ("Grey Tretaspis Shale"), Boda Limestone, Dalarna, Sweden; all late Katian.…”

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

“…Bønsnes Formation, Ringerike district, Skogerholm Formation, Oslo-Asker district, Norway (Strand 1934); erratic limestone boulders from Vormsi/Pirgu Regional Stage ("Lyckholm stage"), Zawidowice, Poland (Dzik 1984); Vormsi/Pirgu Regional Stage ("Lyckholm stage"), Estonia (Teichert 1930); Boda Limestone, Dalarna, Sweden; all late Katian.…”

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

“…The poorly preserved fragment, described by Teichert (1930) as Beloitoceras (?) estonicum from the Pirgu Regional Stage of Hosholm, Estonia, is very similar to C. thorslundi sp.…”

Section: Comparisonmentioning

confidence: 99%

“…The errors must be corrected as follows: Striatocycloceras obliquum (Teichert, 1930) is figured in Kröger & Isakar (2006: figs 7k, o, 8d, 11), as correctly stated in the text, and Striatocycloceras undulostriatum (Hall, 1847) is also correctly figured (Kröger & Isakar 2006: figs 7l 8e, 10a); other species shown are Striatocycloceras romingeri (Foerste, 1932) (Kröger & Isakar 2006: figs 7p, 8r-t) and Striatocycloceras foerstei (Teichert, 1930) Kröger & Isakar (2006: figs 7q, 10h).…”

Section: Remarksmentioning

confidence: 99%

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The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden

Kröger

2013

EJT

442

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The late Katian, Late Ordovician Boda Limestone of Dalarna, Sweden contains a rich cephalopod assemblage. The assemblage consists of 61 species, of 31 genera, comprising almost all major Ordovician cephalopod orders. Most common and diverse are the Orthocerida. The Ascocerida are also remarkably comman and diverse. The new ascocerid species, Redpathoceras bullatum sp. nov., R. depressum sp. nov., R. magnum sp. nov., and Probillingsites scandinavicum sp. nov., give reason to revise current hypotheses on the origin an evolution of this group. An ascocerid origin from barrandeoceratids or aspidoceratids is hypothesised. The absence of actinocerids in the Boda Limestone is notable, and is interpreted as an indication of relatively cool or/and deep depositional environments. The dominance of orthocerids is provisionally interpreted as evidence for nutrient-rich waters during the time of the deposition of the Boda Limestone. Additionally, the assemblage contains the new barrandeocerids >em>Schuchertoceras fryi sp. nov., Siljanoceras varians gen. et sp. nov., Warburgoceras gen. nov. (for Cyrtoceras longitudinale Angelin in Angelin & Lindström, 1880), the new endocerid Cameroceras turrisoides sp. nov., the new oncocerid Cyrtorizoceras thorslundi sp. nov., and the new orthocerids Dawsonoceras stumburi sp. nov., Isorthoceras angelini sp. nov., I. curvilineatum sp. nov., Nathorstoceras adnatum gen. et sp. nov., N. kallholnense gen. et sp. nov., Palaeodawsonocerina? nicolletoides sp. nov., Pleurorthoceras osmundsbergense sp. nov., and Striatocycloceras isbergi sp. nov

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“…Herøya Formation, Norway (Strand 1934 Protophragmoceras sphinx -Teichert 1930: 270, 299-301, pl. 7, fig.…”

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

Section: Stratigraphic and Geographic Rangementioning

confidence: 99%

“…The poorly preserved fragment, described by Teichert (1930) as Beloitoceras (?) estonicum from the Pirgu Regional Stage of Hosholm, Estonia, is very similar to C. thorslundi sp.…”

Section: Comparisonmentioning

confidence: 99%

Section: Remarksmentioning

confidence: 99%

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The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden

Kröger

2013

EJT

442

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Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician

Kröger

Isakar

2006

Foss. Rec.

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The annulated orthoceridans of the Middle and Late Ordovician of Baltoscandia are described and their systematic frame is revised. The revision of these nautiloids, which are part of the Orthocerida and Pseudorthocerida, is based on the investigation of characters of the septal neck, the siphuncular tube, and the apex. An unequivocal terminology of these characters is suggested and applied. The shape of the septal neck and the siphuncular tube are described for the first time in Palaeodawsonoceras n. gen., Striatocycloceras n. gen., Dawsonoceras fenestratum Eichwald, 1860, and Gorbyoceras textumaraneum (Roemer, 1861). Ctenoceras sweeti n. sp. is erected. The apex of Dawsonoceras barrandei Horný, 1956 is figured and described for the first time. The distribution of the character states of the apex and the septal neck support the emendation of the families Orthoceratidae, Dawsonoceratidae, and Proteoceratidae. The analysis shows also that the families Kionoceratidae, and Leuroceratidae must be refused because they represent not natural groups. However, it is also shown that the present knowledge is not sufficient to establish an unequivocal classification of the Middle, and Late Ordovician annulate cephalopods.Schlü sselwö rter: Cephalopoda, Orthocerida, Mittleres Ordovizium, Spä tes Ordovizium, Estland. ZusammenfassungDie orthoceriden Cephalopoden des Mittleren bis Spä ten Ordoviziums im Baltoskandium werden beschrieben und revidiert. Die Revision dieser Cephalopoden, welche zu den Orthocerida und Pseudorthocerida gehö ren, stü tzt sich auf die Untersuchung der Apikalenden, der Septalduten und der Form der Siphonalrö hre. Eine eindeutige Terminologie fü r diese Merkmale wird vorgeschlagen und angewandt. Die Form der Septalduten und der Siphonalrö hre von Palaeodawsonoceras n. gen., Striatocycloceras n. gen., Dawsonoceras fenestratum, Eichwald, 1860 und Gorbyoceras textumaraneum (Roemer, 1861) wird erstmals beschrieben. Die Art Ctenoceras sweeti n. sp. wird aufgestellt. Der Apex von Dawsonoceras barrandei Horný, 1956 wird erstmals beschrieben und dargestellt. Die neu gefundenen Merkmale stü tzen eine Emendation der Familien Orthoceratidae, Dawsonoceratidae und Proteoceratidae. Es wird daher dafü r plä diert, die Familien Kionoceratidae (Hyatt, 1900) und Leuroceratidae (Sweet, 1964) nicht mehr zu verwenden, da diese keine natü rlichen Gruppen reprä sentieren. Die Untersuchung zeigt aber auch, dass es derzeit noch nicht mö glich ist die annulaten Cephalopoden des Mittleren und Oberen Ordoviziums zweifelsfrei zu klassifizieren.

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