Papers by Vivianne Berg-madsen
Lethaia, Apr 1, 1978
Page 1. Middle Cambrian monoplacophorans from Bornholm and Australia, and the systematic position... more Page 1. Middle Cambrian monoplacophorans from Bornholm and Australia, and the systematic position of the bellerophontiform molluscs VlVlANNE BERG-MADSEN AND JOHN S. PEEL Berg-Madsen, Vivianne & Peel, John ...
Proceedings of the Geologists' Association, Feb 1, 2019
The monobathrid camerate crinoid Macrostylocrinus bornholmensis Laursen has an unfortunate histor... more The monobathrid camerate crinoid Macrostylocrinus bornholmensis Laursen has an unfortunate history. It was published in a journal not commonly consulted by echinoderm workers and, worse, in time of war; written in a language not in common use for crinoid studies; and described by a stratigrapher, not an expert on pelmatozoans. These and other factors combined to ensure that M. bornholmensis has not been reassessed since it was first described almost 80 years ago, despite belonging to a genus well-known from the Lower Palaeozoic. Macrostylocrinus bornholmensis is Llandovery (Telychian) and not Wenlock as has been reported elsewhere. Diagnostic features include a column that does not bear radices close beneath the cup; a heteromorphic mesistele with five orders of regularly inserted internodals; three basal plates; smooth thecal plates with central folds following rays; and ten pinnulate free arms that are biserial distally. Macrostylocrinus bornholmensis is distinctly different in morphology from well-known, congeneric species described from the Lower Palaeozoic of northern Europe.
Journal of Sedimentary Research, 1983
Two contemporaneous Middle Cambrian glauconies from different depositional environments in southe... more Two contemporaneous Middle Cambrian glauconies from different depositional environments in southern Baltoscandia (the Acrothele granulata Conglomerate of Oland and the Exsulans Limestone Formation of Bornholm) have been studied by means of XRD, EMP, and SEM. These glauconies show a characteristic high silica (> 50%), high alumina (> 10%), and low iron (< 18%) content. The total iron values, as well as substitution of aluminum by iron, indicate a gradual transition between illitic and glauconitic minerals, and support the layer-structure theory to some extent. There is no correlation between interlayer cations, and aluminum/iron. The chemical composition is environmentally induced and can be related to formation and deposition in shallow, cool water. All progressive stages of weathering from glaucony to goethite are found in the Kalby Member of the Exsulans Ls. Fm. A new morphological type of glancony is described: molds closely replicating the (inorganic) pore space where they occur, having imprints of crystal faces from the surrounding calcite cement.
Bulletin of The Geological Society of Denmark, Oct 14, 1988
A new salterellid genus and species, Ellisell yochelsoni, is described from the upper Middle Camb... more A new salterellid genus and species, Ellisell yochelsoni, is described from the upper Middle Cambrian Andrarum Limestone of Bornholm, Denmark. The genus is an undoubted Middle Cambrian record of a phylum otherwise widely considered to be characteristic of the Early Cambrian.
Geologiska föreningens i Stockholm förhandlingar, Oct 1, 1981
Abstract The Middle Cambrian Kalby Member of the Exsulans Limestone Formation exposed at the Laes... more Abstract The Middle Cambrian Kalby Member of the Exsulans Limestone Formation exposed at the Laesa rivulet on the island of Bornholm, Denmark, consists of a lower marl bed (previously known as the Kalby clay) and an upper pyritic bed. The marl bed in its present development is an unconsolidated unit; it has abundant trilobite moulds, mainly phosphatic microfossils, and contains about 35 wt. % CaCO3 in the form of finely dispersed, non-cementing calcite grains. The marl bed is interpreted as a weathering residue of a former limestone corresponding to the Exsulans Limestone. In a consolidated state and soon after its deposition it was subjected to tectonic movements taking place in the Middle Cambrian. Its present lithology represents local decay of the carbonate rocks, including the overlying Andrarum Limestone Formation, in the Laesa area. The faunal analysis of both beds of the Kalby Member is much extended, the fauna showing great similarity to that of the Borregard Member of the Olea section, which sugge...
Lethaia, 1986
ABSTRACT A rich material of echinoderm fragments from two Middle Cambrian stratigraphical levels ... more ABSTRACT A rich material of echinoderm fragments from two Middle Cambrian stratigraphical levels on Bornholm are preserved due to phosphatization of the original calcitic stereom. Preservation of echinoderms in this way - not previously recorded from the Middle Cambrian - permits detailed analysis of the three-dimensional stereom structure. Identifiable are fragments of stylophorans and eocrinoids. Stem columnals, most likely from eocrinoids, show a wide and advanced morphological variation indicating articulation similar to that of crinoids. The material from the Exsulans Limestone/Kalby marl (Ptychagnostus gibbus Zone) represents stem-bearing cystoids older than Akadocrinus from Bohemia. The Andrarum Limestone (Sole-nopleura brachymetopa Zone) contains echinoderm fragments from a higher stratigraphical level, a level correlatable with that from which the oldest North American stem–bearing cystoid, Eustypocystis, has been recorded.
Palaeontology, Oct 1, 1999
Type specimens of Hyolithus tenuistriatus Linnarsson show this species to be the second definitiv... more Type specimens of Hyolithus tenuistriatus Linnarsson show this species to be the second definitive representative of the North American genus Nevadotheca in Scandinavia; H. subcostatus Wallerius is questionably assigned to that genus. Restudy of the types of the hyolithids Hyolithus pennatulus Holm confirms the earlier assignment of that species to Carinolithes Syssoiev and H. araneus Holm is assigned to Lovenedolithes gen. nov. Morphology of the orthothecids Hyolithus (Orthotheca) cor Holm, H. (O.) excavatus Holm and H. (O.) lineatulus Holm supports placement of the first in Contitheca Syssoiev and the others in Decoritheca Syssoiev. Hyolithus (Orthotheca) stylus Holm, type species of Circotheca Syssoiev, is of special significance as the basis for both a family and an order. The morphology of the species suggests that ordinal status is not warranted. Hyolithus obscurus Holm, on which Linevitus Syssoiev is founded, is known only from poorly preserved internal moulds and is unrecognizable.
Journal of Paleontology, 1993
In 1892 the Swedish paleontologist Johan Christian Moberg described and illustrated what he inter... more In 1892 the Swedish paleontologist Johan Christian Moberg described and illustrated what he interpreted as a fossil insect (Hemiptera) from beds of early Ordovician age in the southernmost limestone quarry at Killeröd, Smedstorp Parish in Skåne [Scania], southern Sweden. In a later paper in the same year (Moberg, 1892b), he also made a further passing reference to the presence of the same fossil when describing the accompanying graptolite fauna from Killeröd. One of his main reasons for recording this find was his conclusion (Moberg, 1892a, p. 122) that “it is evidently of great interest with full certainty to be able to prove the presence of airbreathing (terrestrial) animals as far back in time as that during which the oldest strata of the lower Silurian [i.e., Ordovician] were formed” [translation from Swedish].
Papers in palaeontology, Oct 15, 2016
A previously undocumented diversity of Cambrian palaeoscolecids is described from localities in S... more A previously undocumented diversity of Cambrian palaeoscolecids is described from localities in Sweden, Norway and Denmark. The material described here includes isolated sclerites as well as the first macroscopic specimens reported from the palaeocontinent Baltica. The sclerites are all of early middle Cambrian age (Ptychagnostus gibbus Biozone) and are assigned to at least four new species of Hadimopanella, two of which are formally introduced: H. incubo sp. nov. and H. oelandiana sp. nov. The two macroscopic specimens are of late early Cambrian (Ellipsocephalus lunatus Biozone) and early middle Cambrian age (Acadoparadoxides oelandicus Biozone), respectively. The early Cambrian specimen is described as Maotianshania? sp. and comprises an incomplete annulated trunk fragment which is uniformly covered with circular sclerites, indicative of the palaeoscolecid family Maotianshaniidae. This is the first record of this family outside China. The middle Cambrian specimen is
Palaeontology, 1994
Bellerophon cambriensis from the Upper Cambrian of North Wales is redescribed as the type species... more Bellerophon cambriensis from the Upper Cambrian of North Wales is redescribed as the type species of the new genus Telamocornu. Unlike most similarly coiled molluscs of this age, apertural sinuses are present which permit both a functional morphological i
Archives of Natural History, Jun 1, 1989
Orsten, stinkstone, and anthraconite are synonymous terms in theory but not in practice. In order... more Orsten, stinkstone, and anthraconite are synonymous terms in theory but not in practice. In order to trace their development, usage by European geologists through more than 200 years has been investigated. The original definitions and references are examined and found to deviate essentially from the ones in modern geological literature. Another set of poorly defined terms, bitumen and carbon, are found to play a major role in the confusion. A revision of commonly used terms rather than uncritical reproduction from dictionary to dictionary is recommended.
A new salterellid genus and species, Ellisell yochelsoni, is described from the upper Middle Camb... more A new salterellid genus and species, Ellisell yochelsoni, is described from the upper Middle Cambrian Andranim Limestone of Bornholm, Denmark. The genus is an undoubted Middle Cambrian record of a phylum otherwise widely considered to be characteristic of the Early Cambrian.
Transactions of The Royal Society of Edinburgh-earth Sciences, 2002
The fossiliferous bed in the Upper Comley Sandstone, described by Cobbold & Pocock (in 1934) as t... more The fossiliferous bed in the Upper Comley Sandstone, described by Cobbold & Pocock (in 1934) as the 'Paradoxides forchhammeri Grit' and correlated by them with the Andrarum Limestone of the late Middle Cambrian (P. forchhammeri Stage) in Scandinavia, is shown to be a shallow-water development of the older punctuosus Zone (medial Middle Cambrian, P. paradoxissimus Stage). It is here renamed the 'Rushton Brook Bed'. The trilobite fauna, formerly considered comparable with that of the Andrarum Limestone, is reviewed and found taxonomically distinct, the supposed similarities being attributable to facial and preservational factors.
Den 18 juni 1715 forsvarades uppsatsen De Fluviatili Astaco ejusque usu medico vid Uppsalaunivers... more Den 18 juni 1715 forsvarades uppsatsen De Fluviatili Astaco ejusque usu medico vid Uppsalauniversitet. Forfattaren var Lars Roberg ochamnet var kraftdjur av olika slag. Arbetet innehollen figur och ...
Palaeontology, 1999
Re-examination of type specimens of Early Cambrian and early Mid Cambrian hyoliths from Sweden co... more Re-examination of type specimens of Early Cambrian and early Mid Cambrian hyoliths from Sweden confirms placement of Hyolithes teretiusculus Linnarsson in Hexitheca Syssoiev, and reassignment to the order Hyolithida rather than Orthothecida. Inclusion of Hyolithes affinis Holm within Decoritheca Syssoiev is reconfirmed , and Hyolithes socialis Linnarsson is now referred to Nevadotheca Malinky and Slapylites Marek. An operculum included under Hyolithes oelandicus Holm is transferred provisionally to Maxilites Marek, and conchs of that species are placed under Tulenicornus Val'kov with question. No other hyolith species of Holm can be definitely assigned to genus. The rarity of well preserved opercula is a major impediment to recognizing hyolith taxa confidently, and we follow Holm in attributing the comparative rarity of opercula to the fact that in some hyolith taxa the operculum may have been composed of a different, and perhaps less stable, material than the rest of the conch.
Papers in Palaeontology, 2016
A previously undocumented diversity of Cambrian palaeoscolecids is described from localities in S... more A previously undocumented diversity of Cambrian palaeoscolecids is described from localities in Sweden, Norway and Denmark. The material described here includes isolated sclerites as well as the first macroscopic specimens reported from the palaeocontinent Baltica. The sclerites are all of early middle Cambrian age (Ptychagnostus gibbus Biozone) and are assigned to at least four new species of Hadimopanella, two of which are formally introduced: H. incubo sp. nov. and H. oelandiana sp. nov. The two macroscopic specimens are of late early Cambrian (Ellipsocephalus lunatus Biozone) and early middle Cambrian age (Acadoparadoxides oelandicus Biozone), respectively. The early Cambrian specimen is described as Maotianshania? sp. and comprises an incomplete annulated trunk fragment which is uniformly covered with circular sclerites, indicative of the palaeoscolecid family Maotianshaniidae. This is the first record of this family outside China. The middle Cambrian specimen is
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Papers by Vivianne Berg-madsen