[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Ornithopod tracksite from Lower Cretaceous of Svalbard (free pdf) + more Scandinavian Arctic Mesozoic papers

 An update (and subject line fix):

The pdfs for these papers are available online at the links below:

Lars B. Clemmensen, Jesper Milàn, Jan Schulz Adolfssen, Eliza Jarl
Estrup, Nicolai Frobøse, Nicole Klein, Octávio Mateus, and Oliver
Wings (2015) [2016]
The vertebrate-bearing Late Triassic Fleming Fjord Formation of
central East Greenland revisited: stratigraphy, palaeoclimate and new
palaeontological data
Geological Society Special Publications 434 (advance online publication)

Free pdf:



Hendrik Klein, Jesper Milàn, Lars B. Clemmensen, Nicolaj Frobøse,
Octávio Mateus, Nicole Klein, Jan S. Adolfssen, Eliza J. Estrup, and
Oliver Wings
Archosaur footprints (cf. Brachychirotherium) with unusual morphology
from the Upper Triassic Fleming Fjord Formation (Norian–Rhaetian) of
East Greenland.
Geological Society Special Publications 434 (advance online publication)

Free pdf:


On Fri, Jan 8, 2016 at 8:26 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> Some recent papers not yet mentioned.
> These papers are advance online versions for the following special
> publication not yet published:
> Geological Society Special Publication SP434:  Mesozoic Biotas of
> Scandinavia and its Arctic Territories
> Edited by B. P. Kear, J. Lindgren, J. H. Hurum, J. Milàn and V. Vajda
> The Mesozoic is arguably the most spectacular interval of biotic
> evolution. However, global biodiversity from this time interval is
> incompletely documented. Scandinavia and its Arctic territories
> represent a hitherto enigmatic geographical region that has recently
> yielded many globally significant discoveries and offered new insights
> into Mesozoic high-latitude ecosystems and environments.
> http://sp.lyellcollection.org/online-first/434
> ==
> Some are available in open access.
> ===
> Jørn H. Hurum, Patrick S. Druckenmiller, Øyvind Hammer, Hans A.
> Nakrem, and Snorre Olaussen (2016)
> The theropod that wasn't: an ornithopod tracksite from the
> Helvetiafjellet Formation (Lower Cretaceous) of Boltodden, Svalbard.
> Geological Society Special Publications 434 (advance online publication)
> doi:10.1144/SP434.10
> http://sp.lyellcollection.org/content/early/2016/01/05/SP434.10.abstract?sid=ee8dc18c-1780-4526-beb9-1d29b1db6204
> Free pdf:
> http://sp.lyellcollection.org/content/early/2016/01/05/SP434.10.full.pdf+html?sid=ee8dc18c-1780-4526-beb9-1d29b1db6204
> We re-examine a Lower Cretaceous dinosaur tracksite at Boltodden in
> the Kvalvågen area, on the east coast of Spitsbergen, Svalbard. The
> tracks are preserved in the Helvetiafjellet Formation (Barremian). A
> sedimentological characterization of the site indicates that the
> tracks formed on a beach/margin of a lake or interdistributary bay,
> and were preserved by flooding. In addition to the two imprints
> already known from the site, we describe at least 34 additional,
> previously unrecognized pes and manus prints, including one trackway.
> Two pes morphotypes and one manus morphotype are recognized. Given the
> range of morphological variation and the presence of manus tracks, we
> reinterpret all the prints as being from an ornithopod rather than a
> theropod, as previously described. We assign the smaller (morphotype
> A, pes; morphotype B, manus) to Caririchnium billsarjeanti. The larger
> (morphotype C, pes) track is assigned to Caririchnium sp., differing
> in size and interdigital angle from the two described ichnospecies C.
> burreyi and C. billsarjeanti. The occurrence of a quadrupedal, small
> to medium-sized ornithopod in Svalbard is puzzling, considering the
> current palaeogeographical reconstructions and that such dinosaur
> tracks have mainly been described from Europe but not North America.
> ====
> Stephen F. Poropat, Elisabeth Einarsson, Johan Lindgren, Mohamad
> Bazzi, Clarence Lagerstam, and Benjamin P. Kear (2015) [2016]
> Late Cretaceous dinosaurian remains from the Kristianstad Basin of
> southern Sweden.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.8
> http://sp.lyellcollection.org/content/early/2015/12/14/SP434.8.abstract
> Mesozoic dinosaur fossils are exceptionally rare in Scandinavia. The
> Swedish record is typically depauperate, with the Kristianstad Basin
> of Skåne (Scania) yielding all of the known fossils from Swedish
> Cretaceous strata. Although highly fragmentary, these body remnants
> are important because they provide evidence of a relatively diverse
> fauna, including previously recognized hesperornithiform birds and
> leptoceratopsid ceratopsians, as well as indeterminate ornithopods
> that are confirmed here for the first time. In this paper, we describe
> three phalanges (from Åsen) and an incomplete right tibia (from
> Ugnsmunnarna) from the Kristianstad Basin. One of the phalanges
> appears to pertain to a leptoceratopsid ceratopsian, providing further
> evidence of these small ornithischians in the Cretaceous sediments of
> Sweden. The other two phalanges are interpreted as deriving from small
> ornithopods similar to Thescelosaurus and Parksosaurus. The tibia
> appears to represent the first evidence of a non-avian theropod
> dinosaur in the Cretaceous of Sweden, with a previous report of
> theropod remains based on fish teeth having been corrected by other
> authors. The remains described herein provide important additions to
> the enigmatic dinosaurian fauna that inhabited the Fennoscandian
> archipelago during the latest Cretaceous.
> ======
> Hendrik Klein, Jesper Milàn, Lars B. Clemmensen, Nicolaj Frobøse,
> Octávio Mateus, Nicole Klein, Jan S. Adolfssen, Eliza J. Estrup, and
> Oliver Wings
> Archosaur footprints (cf. Brachychirotherium) with unusual morphology
> from the Upper Triassic Fleming Fjord Formation (Norian–Rhaetian) of
> East Greenland.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.1
> http://sp.lyellcollection.org/content/early/2015/12/14/SP434.1.abstract
> The Ørsted Dal Member of the Upper Triassic Fleming Fjord Formation in
> East Greenland is well known for its rich vertebrate fauna,
> represented by numerous specimens of both body and ichnofossils. In
> particular, the footprints of theropod dinosaurs have been described.
> Recently, an international expedition discovered several slabs with
> 100 small chirotheriid pes and manus imprints (pes length 4–4.5 cm) in
> siliciclastic deposits of this unit. They show strong similarities
> with Brachychirotherium, a characteristic Upper Triassic ichnogenus
> with a global distribution. A peculiar feature in the Fleming Fjord
> specimens is the lack of a fifth digit, even in more deeply impressed
> imprints. Therefore, the specimens are assigned here tentatively to
> cf. Brachychirotherium. Possibly, this characteristic is related to
> the extremely small size and early ontogenetic stage of the
> trackmaker. The record from Greenland is the first evidence of this
> morphotype from the Fleming Fjord Formation. Candidate trackmakers are
> crocodylian stem group archosaurs; however, a distinct correlation
> with known osteological taxa from this unit is not currently possible.
> While the occurrence of sauropodomorph plateosaurs in the bone record
> links the Greenland assemblage more closer to that from the Germanic
> Basin of central Europe, here the described footprints suggest a
> Pangaea-wide exchange.
> ====
> Lene L. Delsett, Linn K. Novis, Aubrey J. Roberts, Maayke J. Koevoets,
> Øyvind Hammer, Patrick S. Druckenmiller, and Jørn H. Hurum (2015)
> [2016]
> The Slottsmøya marine reptile Lagerstätte: depositional environments,
> taphonomy and diagenesis.
> Geological Society Special Publications 434 (advance online publication)
> doi:10.1144/SP434.2
> http://sp.lyellcollection.org/content/early/2015/12/17/SP434.2.abstract
> Free pdf:
> http://sp.lyellcollection.org/content/early/2015/12/17/SP434.2.full.pdf+html
> The Late Jurassic Slottsmøya Member Lagerstätte on Spitsbergen offers
> a unique opportunity to study the relationships between vertebrate
> fossil preservation, invertebrate occurrences and depositional
> environment. In this study, 21 plesiosaurian and 17 ichthyosaur
> specimens are described with respect to articulation, landing mode,
> preservation, and possible predation and scavenging. The stratigraphic
> distribution of marine reptiles in the Slottsmøya Member is analysed,
> and a correlation between high total organic content, low oxygen
> levels, few benthic invertebrates and optimal reptile preservation is
> observed. A new model for 3D preservation of vertebrates in highly
> compacted organic shales is explained.
> ====
> Sven Sachs, Johan Lindgren, and Mikael Siversson (2015) [2016]
> A partial plesiosaurian braincase from the Upper Cretaceous of Sweden.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.7
> http://sp.lyellcollection.org/content/early/2015/12/14/SP434.7.abstract
> A partial exoccipital–opisthotic from the uppermost lower Campanian
> (Upper Cretaceous) of the Åsen locality, Kristianstad Basin,
> southernmost Sweden, is described and illustrated. The fossil
> represents the first braincase element of a plesiosaur found in
> Sweden. It includes the chamber for the ampulla and utriculus,
> openings for the caudal vertical and horizontal semicircular canals,
> and four foramina for cranial nerves. The incomplete braincase can be
> referred to an elasmosaurid plesiosaur, and closely resembles the
> exoccipital–opisthotic of Libonectes morgani and a referred specimen
> of Aristonectes parvidens. Although we discuss putative postcranial
> material of the elasmosaurid subfamily Aristonectinae in the uppermost
> lower Campanian of southernmost Sweden, the exoccipital–opisthotic
> from Åsen most likely belongs to a juvenile individual of a
> non-aristonectine elasmosaur.
> ===
> Benjamin P. Kear, Stephen F. Poropat, and Mohamad Bazzi (2015) [2016]
> Late Triassic capitosaurian remains from Svalbard and the
> palaeobiogeographical context of Scandinavian Arctic temnospondyls.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.11
> http://sp.lyellcollection.org/content/early/2015/12/16/SP434.11.abstract?sid=ee8dc18c-1780-4526-beb9-1d29b1db6204
> The Norwegian Arctic Svalbard archipelago is famous for its prolific
> record of Early–Middle Triassic vertebrate fossils. These represent
> mainly marine amniotes, together with sharks, bony fishes and
> temnospondyl amphibians, the latter providing an important faunal
> correlate with coeval assemblages from the Danish autonomous region of
> Greenland. However, substantial biostratigraphical gaps exist in the
> Upper Triassic strata of Svalbard, which are marked by pronounced
> facies shifts from marine to deltaic systems and intermittent
> depositional hiatuses. These are accompanied by a dearth of documented
> vertebrate remains, a notable exception being the partial skull of the
> capitosaurian Capitosaurus polaris and a few isolated stereospondylian
> intercentra probably from the middle–late Carnian De Geerdalen
> Formation of Spitsbergen. Reassessment of this material, which
> incorporates the only undisputed capitosaurian fossil from Svalbard,
> indicates affinity with Cyclotosaurus, known elsewhere from the late
> Norian–early Rhaetian Fleming Fjord Formation of Greenland. The
> Scandinavian Arctic temnospondyls constituted components of sympatric
> assemblages that inhabited the Boreal margin of Pangaea throughout the
> Triassic.
> ==
> Lars B. Clemmensen, Jesper Milàn, Jan Schulz Adolfssen, Eliza Jarl
> Estrup, Nicolai Frobøse, Nicole Klein, Octávio Mateus, and Oliver
> Wings (2015) [2016]
> The vertebrate-bearing Late Triassic Fleming Fjord Formation of
> central East Greenland revisited: stratigraphy, palaeoclimate and new
> palaeontological data.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.3
> http://sp.lyellcollection.org/content/early/2015/12/14/SP434.3.abstract
> In Late Triassic (Norian–Rhaetian) times, the Jameson Land Basin lay
> at 40° N on the northern part of the supercontinent Pangaea. This
> position placed the basin in a transition zone between the relatively
> dry interior of the supercontinent and its more humid periphery.
> Sedimentation in the Jameson Land Basin took place in a lake–mudflat
> system and was controlled by orbitally forced variations in
> precipitation. Vertebrate fossils have consistently been found in
> these lake deposits (Fleming Fjord Formation), and include fishes,
> dinosaurs, amphibians, turtles, aetosaurs and pterosaurs. Furthermore,
> the fauna includes mammaliaform teeth and skeletal material. New
> vertebrate fossils were found during a joint vertebrate
> palaeontological and sedimentological expedition to Jameson Land in
> 2012. These new finds include phytosaurs, a second stem testudinatan
> specimen and new material of sauropodomorph dinosaurs, including
> osteologically immature individuals. Phytosaurs are a group of
> predators common in the Late Triassic, but previously unreported from
> Greenland. The finding includes well-preserved partial skeletons that
> show the occurrence of four individuals of three size classes. The new
> finds support a late Norian–early Rhaetian age for the Fleming Fjord
> Formation, and add new information on the palaeogeographical and
> palaeolatitudinal distribution of Late Triassic faunal provinces.
> ==
> S. McLoughlin and C. Strullu-Derrien (2015) [2016]
> Biota and palaeoenvironment of a high middle-latitude Late Triassic
> peat-forming ecosystem from Hopen, Svalbard archipelago.
> Geological Society Special Publications 434 (advance online publication)
> doi: 10.1144/SP434.4
> http://sp.lyellcollection.org/content/early/2015/12/22/SP434.4.abstract
> Free pdf:
> http://sp.lyellcollection.org/content/early/2015/12/22/SP434.4.full.pdf+html
> A siliceous permineralized peat block recovered from Hopen in the
> Svalbard archipelago hosts a low-diversity Late Triassic flora
> dominated by autochthonous roots and stems of bennettitaleans and
> lycophytes, and parautochthonous leaves, sporangia, spores and pollen
> from a small range of pteridophytes and gymnosperms. Some
> parenchymatous bennettitalean root cells show interactions with
> chytrid fungi and bacteria; the remains of other fungi and fungi-like
> organisms are dispersed within the peat's detrital matrix. Cavities
> excavated through some roots and compacted detritus contain abundant
> coprolites probably derived from sapro-xylophagous oribatid mites,
> although no body fossils have yet been identified. Sparse larger
> coprolites containing leaf fragments attest to the presence of
> invertebrate folivores in the ancient ecosystem. The low-diversity
> flora, relatively few trophic levels and simple nutritional web,
> together with sedimentological aspects of the host formation and the
> peat structure, collectively favour accumulation of the organic mass
> as a fibric (root-dominated) peat within a temperate (high
> middle-latitude), well-aerated mire.