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  1. Article ; Online: Stolleagrion foghnielseni (Odonata, Cephalozygoptera, Dysagrionidae) gen. et sp. nov.: a new odonatan from the PETM recovery phase of the earliest Ypresian Fur Formation, Denmark.

    Simonsen, Thomas J / Archibald, S Bruce / Rasmussen, Jan A / Sylvestersen, Ren L / Olsen, Kent / Ware, Jessica L

    Zootaxa

    2024  Volume 5415, Issue 3, Page(s) 493–498

    Abstract: We describe the new genus and species Stolleagrion foghnielseni n. gen. et sp. from the Fur Formation in northwestern Denmark based on a single fossil wing. This is the first odonatan described from the earliest part of the PETM recovery phase of the ... ...

    Abstract We describe the new genus and species Stolleagrion foghnielseni n. gen. et sp. from the Fur Formation in northwestern Denmark based on a single fossil wing. This is the first odonatan described from the earliest part of the PETM recovery phase of the early Eocene. A combination of nine wing character states are considered to be diagnostic of the Dysagrionidae Cockrell only together with the cephalozygopteran head; however, the combination of these nine plus the presence of Ax0 is also diagnostic without the head. By this, we assign Stolleagrion foghnielseni to the Dysagrionidae and reassess the position of other odonates previously treated as cf. Dysagrionidae.
    MeSH term(s) Animals ; Odonata ; Fossils ; Wings, Animal
    Language English
    Publishing date 2024-02-22
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5415.3.9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The damselfly genus Furagrion Petrulevičius et al. (Odonata, Zygoptera) from the early Eocene Fur Formation of Denmark and the dysagrionoid grade.

    Archibald, S Bruce / Ware, Jessica L / Rasmussen, Jan A / Sylvestersen, René L / Olsen, Kent / Simonsen, Thomas J

    Zootaxa

    2023  Volume 5278, Issue 2, Page(s) 289–317

    Abstract: The earliest Eocene odonate genus Furagrion Petrulevičius et al. from the Danish Fur Formation is revised based on eighteen specimens, two of which apparently have been lost since their publication. The holotype of Phenacolestes jutlandicus Henriksen, ... ...

    Abstract The earliest Eocene odonate genus Furagrion Petrulevičius et al. from the Danish Fur Formation is revised based on eighteen specimens, two of which apparently have been lost since their publication. The holotype of Phenacolestes jutlandicus Henriksen, type species of Furagrion, is incomplete and lacks the characters currently used to differentiate species, genera and higher taxa in Odonata. We, therefore, propose that the holotype is set aside and a recently discovered nearly complete Fur Formation fossil is designated as neotype. Furagrion possesses all of the nine wing character states currently used along with head shape for diagnosing the Dysagrionidae; however, Furagrion has a characteristically zygopteran head, not the distinctive head shape of the suborder Cephalozygoptera. We, therefore, treat it as a zygopteran unassigned to family. These nine wing character states appear in different combinations not only in various Zygoptera and Cephalozygoptera, but also in the Frenguelliidae, an Eocene family of Argentina that may represent an unnamed suborder. We recognise these taxa as constituting a dysagrionoid grade, in which these character states appear either convergently or as symplesiomorphies. Furagrion morsi Zessin is synonymized with Phenacolestes jutlandicus Henriksen, syn. nov. and Morsagrion Zessin with Furagrion Petrulevičius, Wappler, Wedmann, Rust, and Nel, syn. nov.
    MeSH term(s) Animals ; Odonata ; Fossils ; Wings, Animal
    Language English
    Publishing date 2023-05-05
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5278.2.4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Late Cambrian (Furongian) to mid-Ordovician euconodont events on Baltica: Invasions and immigrations

    Stouge, Svend / Bagnoli, Gabriella / Rasmussen, Jan A

    Palaeogeography, palaeoclimatology, palaeoecology. 2019 Apr. 05,

    2019  

    Abstract: The stratigraphic distributions, taxonomy, diversity, evolutionary lineages and events of late Cambrian to Middle Ordovician euconodonts of Baltica are briefly reviewed and re-evaluated. The euconodonts of the late Furongian (Stage 10, late Cambrian) to ... ...

    Abstract The stratigraphic distributions, taxonomy, diversity, evolutionary lineages and events of late Cambrian to Middle Ordovician euconodonts of Baltica are briefly reviewed and re-evaluated. The euconodonts of the late Furongian (Stage 10, late Cambrian) to Middle Ordovician successions of Baltica record innovation, immigration and two invasions of short duration and one major extinction. The innovation event with an origin on Baltica is the rise of the Proconodontus serratus lineage in the late Furongian (Stage 10). The immigration events comprise the Cordylodus immigration to Baltoscandia in latest Cambrian and this phylogenetic lineage persisted to mid-Tremadocian (Early Ordovician) and vanished at the global mid-Tremadocian extinction event. The late Floian – basal Dapingian transition is a significant event on Baltica. It is characterized by the immigration of the important genera Baltoniodus and Microzarkodina and upon their arrival these taxa remained on the Baltica palaeocontinent and stayed for a long period forming evolutionary lineages. The basal Darriwilian immigration event by the genus Lenodus and coeval prominent sea-level lowstand were caused by a short global icehouse stage related to the expansion of the polar ice sheets. The extinction event caused the disappearance of the characteristic Cordylodus fauna. Most events are related to changes in the palaeoclimate resulting from the movement of the Baltica palaecontinent and associated eustatic sea-level changes. However, the cause of the global early Tremadocian extinction event is not yet completely clear and remains unsolved. Perhaps abrupt and significant palaeoceanographic changes on a global scale (i.e., plate tectonic movements causing sudden change of ocean currents and climate from warm to cold) were the cause of this significant extinction in the Early Ordovician.
    Keywords Cambrian period ; Ordovician period ; climate ; cold ; extinction ; fauna ; ice ; immigration ; paleoclimatology ; phylogeny ; sea level ; taxonomy ; tectonics ; water currents
    Language English
    Dates of publication 2019-0405
    Publishing place Elsevier B.V.
    Document type Article
    Note Pre-press version
    ZDB-ID 417718-6
    ISSN 0031-0182
    ISSN 0031-0182
    DOI 10.1016/j.palaeo.2019.04.007
    Database NAL-Catalogue (AGRICOLA)

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    Z 67/162: Show issues

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  4. Article ; Online: Danowhetaksa gen. nov. with two species from the early Eocene lst Formation from Denmark, the first Palearctic Whetwhetaksidae (Odonata: Cephalozygoptera).

    Simonsen, Thomas J / Archibald, S Bruce / Rasmussen, Jan A / Sylvestersen, Ren L / Olsen, Kent / Ware, Jessica L

    Zootaxa

    2022  Volume 5099, Issue 5, Page(s) 586–592

    Abstract: We propose Danowhetaksa n. gen. (Odonata: Whetwhetaksidae) with two new species: D. birgitteae n. gen. et sp. and D. rusti n. gen. et sp. from the earliest Ypresian Stolleklint clay of the lst Formation in northwestern Denmark. Whetwhetaksidae has ... ...

    Abstract We propose Danowhetaksa n. gen. (Odonata: Whetwhetaksidae) with two new species: D. birgitteae n. gen. et sp. and D. rusti n. gen. et sp. from the earliest Ypresian Stolleklint clay of the lst Formation in northwestern Denmark. Whetwhetaksidae has previously been known only from the Ypresian Okanagan Highlands of far-western North America, the new records are, therefore, the first from the Palearctic Region.
    MeSH term(s) Animals ; Fossils ; Odonata
    Language English
    Publishing date 2022-02-16
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5099.5.5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The Sirius Passet Lagerstätte of North Greenland-A geochemical window on early Cambrian low-oxygen environments and ecosystems.

    Hammarlund, Emma U / Smith, M Paul / Rasmussen, Jan A / Nielsen, Arne T / Canfield, Donald E / Harper, David A T

    Geobiology

    2018  Volume 17, Issue 1, Page(s) 12–26

    Abstract: The early Cambrian Sirius Passet fauna of northernmost Greenland (Cambrian Series 2, Stage 3) contains exceptionally preserved soft tissues that provide an important window to early animal evolution, while the surrounding sediment holds critical data on ... ...

    Abstract The early Cambrian Sirius Passet fauna of northernmost Greenland (Cambrian Series 2, Stage 3) contains exceptionally preserved soft tissues that provide an important window to early animal evolution, while the surrounding sediment holds critical data on the palaeodepositional water-column chemistry. The present study combines palaeontological data with a multiproxy geochemical approach based on samples collected in situ at high stratigraphic resolution from Sirius Passet. After careful consideration of chemical alterations during burial, our results demonstrate that fossil preservation and biodiversity show significant correlation with iron enrichments (Fe
    MeSH term(s) Biological Evolution ; Ecosystem ; Fossils ; Geologic Sediments/chemistry ; Greenland ; Oceans and Seas ; Oxygen/analysis ; Seawater/chemistry
    Chemical Substances Oxygen (S88TT14065)
    Language English
    Publishing date 2018-09-27
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2113509-5
    ISSN 1472-4669 ; 1472-4677
    ISSN (online) 1472-4669
    ISSN 1472-4677
    DOI 10.1111/gbi.12315
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  6. Article ; Online: East Greenland Caledonides

    Higgins, A.K. / Soper, N.J. / Smith, M. Paul / Rasmussen, Jan A.

    Geological Survey of Denmark and Greenland Bulletin, Vol 06, Pp 41-

    stratigraphy, structure and geochronology: The Caledonian thin-skinned thrust belt of Kronprins Christian Land, eastern North Greenland

    2004  Volume 56

    Abstract: Kronprins Christian Land in the extreme north of the East Greenland Caledonides, exposes a thin-skinned thrust belt up to 50 km wide developed in Ordovician–Silurian platform limestones and dolostones of the Iapetus passive margin. This thrust belt is ... ...

    Abstract Kronprins Christian Land in the extreme north of the East Greenland Caledonides, exposes a thin-skinned thrust belt up to 50 km wide developed in Ordovician–Silurian platform limestones and dolostones of the Iapetus passive margin. This thrust belt is characterised by a series of SSW–NNE-trending and east-dipping Caledonian thrusts with westward displacements of generally a few kilometres each. It passes westwards into undisturbed autochthonous foreland. Based on a line and area restoration, total displacement along a well-exposed WNW–ESE section through the thrust belt amounts to 17.6 km, which represents a shortening of 45% in the line of section. Biostratigraphic control in the limestone and dolostone succession is based on conodonts and macrofossils. The alteration colours of the conodonts provide estimates of maximum burial temperatures, which show that the thickness of the overlying thrust sheetsranged from about 6 to 12.5 km from west to east across the thrust belt. Since the estimated former thickness of the Vandredalen thrust sheet above the thin-skinned parautochthonous thrust belt is insufficient to yield the temperatures attained, higher thrust sheets must once have extended across the region.
    Keywords Caledonides ; conodonts ; Greenland ; Ordovician ; thrust tectonics ; Geology ; QE1-996.5 ; Science ; Q ; DOAJ:Earth Sciences ; DOAJ:Earth and Environmental Sciences ; Geophysics. Cosmic physics ; QC801-809 ; Physics ; QC1-999 ; DOAJ:Geophysics and Geomagnetism
    Subject code 550
    Language English
    Publishing date 2004-12-01T00:00:00Z
    Publisher Geological Survey of Denmark and Greenland
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Review of Survey Activities 2005

    Ineson, Jon R. / Buchardt, Bjørn / Lassen, Susanne / Rasmussen, Jan A. / Schiøler, Poul / Schovsbo, Niels H. / Sheldon, Emma / Surlyk, Finn

    Geological Survey of Denmark and Greenland Bulletin, Vol 10, Pp 9-

    Stratigraphy and palaeoceanography of upper Maastrichtian chalks, southern Danish Central Graben

    2006  Volume 12

    Keywords Stratigraphy ; palaeoceanography ; Maastrichtian chalks ; graben ; key well ; nanoflora ; foraminifers ; Geology ; QE1-996.5 ; Science ; Q ; DOAJ:Earth Sciences ; DOAJ:Earth and Environmental Sciences ; Geophysics. Cosmic physics ; QC801-809 ; Physics ; QC1-999 ; DOAJ:Geophysics and Geomagnetism
    Language English
    Publishing date 2006-11-01T00:00:00Z
    Publisher Geological Survey of Denmark and Greenland
    Document type Article ; Online
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  8. Article ; Online: Lithostratigraphy of the Palaeogene – Lower Neogene succession of the Danish North Sea

    Rasmussen, Jan A. / Prince, Iain / Kristensen, Lars E. / Johannessen, Erik P. / Heilmann-Clausen, Claus / Hamberg, Lars / Dybkjær, Karen / Dam, Gregers / Clausen, Ole R. / Andsbjerg, Jan / Schiøler, Poul

    Geological Survey of Denmark and Greenland Bulletin, Vol 12, Pp 1-

    2007  Volume 77

    Abstract: As a result of a lithological, sedimentological and biostratigraphic study of well sections from the Danish sector of the North Sea, including some recently drilled exploration wells on the Ringkøbing–Fyn High, the lithostratigraphic framework for the ... ...

    Abstract As a result of a lithological, sedimentological and biostratigraphic study of well sections from the Danish sector of the North Sea, including some recently drilled exploration wells on the Ringkøbing–Fyn High, the lithostratigraphic framework for the siliciclastic Palaeogene to Lower Neogene sediments of the Danish sector of the North Sea is revised. The sediment package from the top of the Chalk Group to the base of the Nordland Group is subdivided into seven formations containing eleven new members. The existing Våle, Lista, Sele, Fur, Balder, Horda and Lark Formations of previously published lithostratigraphic schemes are adequate for a subdivision of the Danish sector at formation level. Bor is a new sandstone member of the Våle Formation. The Lista Formation is subdivided into three new mudstone members: Vile, Ve and Bue, and three new sandstone members: Tyr, Idun and Rind. Kolga is a new sandstone member of the Sele Formation. Hefring is a new sandstone member of the Horda Formation. Freja and Dufa are two new sandstone members of the Lark Formation. Danish reference sections are established for the formations, and the descriptions of their lithology, biostratigraphy, age and palaeoenvironmental setting are updated.
    Keywords Lithostratigraphy ; biostratigraphy ; North Sea Basin ; Palaeogene ; Neogene ; Geology ; QE1-996.5 ; Science ; Q ; DOAJ:Earth Sciences ; DOAJ:Earth and Environmental Sciences ; Geophysics. Cosmic physics ; QC801-809 ; Physics ; QC1-999 ; DOAJ:Geophysics and Geomagnetism
    Subject code 550
    Language English
    Publishing date 2007-06-01T00:00:00Z
    Publisher Geological Survey of Denmark and Greenland
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Review of Survey activities 2005

    Dalhoff, Finn / Larsen, Lotte M. / Ineson, Jon R. / Stouge, Svend / Bojesen-Koefoed, Jørgen A. / Lassen, Susanne / Kuijpers, Antoon / Rasmussen, Jan A. / Nøhr-Hansen, Henrik

    Geological Survey of Denmark and Greenland Bulletin, Vol 10, Pp 33-

    Continental crust in the Davis Strait: new evidence from seabed sampling

    2006  Volume 36

    Keywords Continental crust ; Davis Strait ; seabed sampling ; Maniitsoq High ; Hecla High ; seamounts ; Geology ; QE1-996.5 ; Science ; Q ; DOAJ:Earth Sciences ; DOAJ:Earth and Environmental Sciences ; Geophysics. Cosmic physics ; QC801-809 ; Physics ; QC1-999 ; DOAJ:Geophysics and Geomagnetism
    Language English
    Publishing date 2006-11-01T00:00:00Z
    Publisher Geological Survey of Denmark and Greenland
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Review of Survey activities 2004

    Schiøler, Poul / Andsberg, Jan / Clausen, Ole R. / Dam, Gregers / Dybkjær, Karen / Hamberg, Lars / Heilmann-Clausen, Claus / Kristensen, Lars E. / Prince, Iain / Rasmussen, Jan A.

    Geological Survey of Denmark and Greenland Bulletin, Vol 07, Pp 21-

    A revised lithostratigraphy for the Palaeogene – lower

    2005  Volume 24

    Keywords Geological Survey of Denmark and Greenland ; survey organisations ; current research ; Denmark ; Greenland ; Geology ; QE1-996.5 ; Science ; Q ; DOAJ:Earth Sciences ; DOAJ:Earth and Environmental Sciences ; Geophysics. Cosmic physics ; QC801-809 ; Physics ; QC1-999 ; DOAJ:Geophysics and Geomagnetism
    Language English
    Publishing date 2005-07-01T00:00:00Z
    Publisher Geological Survey of Denmark and Greenland
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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