The Slottsmøya marine reptile
            <i>Lagerstätte</i>
            : depositional environments, taphonomy and diagenesis

Delsett, Lene Liebe; Novis, Linn K.; Roberts, Aubrey Jane; Koevoets, Maayke; Hammer, Øyvind; Druckenmiller, Patrick; Hurum, Jørn H.

doi:10.1144/sp434.2

Cited by 29 publications

(44 citation statements)

References 33 publications

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“…The specimen described here (PMO 222.663) is from the middle unit (Fig. 2), a particularly fossiliferous stratigraphic interval (»14 m) from which six ichthyosaur and six plesiosaur specimens have been excavated (Delsett et al, 2016). Specimen PMO 216.838, the recently referred specimen of Colymbosaurus svalbardensis (Knutsen et al, 2012a), was also found in this same interval.…”

Section: Geological Settingmentioning

confidence: 54%

“…3). Similar to most of the marine reptile material from the Slottsmøya Member, the specimen has undergone congelifraction (fragmentation due to repeated freeze-thaw cycles) and compaction in certain areas (Delsett et al, 2016). Cranial material, as well as cervical and anterior dorsal vertebrae, is not preserved.…”

Section: Taphonomymentioning

confidence: 91%

“…As summarized in Delsett et al (2016), detailed stratigraphic and isotopic work has divided the member into lower (¡22-0 m), middle (0-27 m), and upper (27-52 m) units (Fig. 2), using a distinctive echinoderm bed ('yellow layer') as a lower marker bed (0 m; Rousseau and Nakrem, 2012) and the Dorsoplanites layer as a second, stratigraphically higher marker bed (27 m; Nagy and Basov, 1998;Collignon and Hammer, 2012;Hammer et al, 2012;Hj almarsd ottir et al, 2012).…”

Section: Geological Settingmentioning

confidence: 99%

“…The specimen was found 14 m above the 'yellow layer' marker bed and 13 m below the Dorsoplanites marker bed (Delsett et al, 2016); locality coordinates 33X E518470 N8696400.…”

Section: Colymbosaurus Svalbardensismentioning

confidence: 99%

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Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

Roberts

Druckenmiller

Delsett

et al. 2017

Journal of Vertebrate Paleontology

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ABSTRACT-Colymbosaurus is a genus of long-necked plesiosaurian represented by two valid species: C. megadeirus from the Upper Kimmeridge Clay Formation (Kimmeridgian-Tithonian) of the United Kingdom and C. svalbardensis from the Slottsmøya Member of the Agardhfjellet Formation (Tithonian-Berriasian) of Svalbard, Norway. Due to the lack of complete and articulated skeletons and a near absence of cranial material, Colymbosaurus has been problematic to characterize morphologically. Here, we describe and conduct a phylogenetic analysis on an informative new specimen referable to C. svalbardensis from the Slottsmøya Member, preserving a large portion of the axial and appendicular skeleton. The new material contributes important new osteological data for the species and together with an extensive examination of congeners in British museums, clarifies the diagnostic characters of the genus. We provide two new diagnostic characters of the epipodials for the genus and reevaluate the utility of an anteroposteriorly oriented bisecting ridge on the distal end of the propodials. We also present two new diagnostic features for C. svalbardensis regarding the neural canal and femoral morphology. A phylogenetic analysis recovers a monophyletic and well-supported Colymbosaurus. The new specimen of C. svalbardensis confirms that this species is not synonymous with other described Slottsmøya Member plesiosauroids, demonstrating considerable diversity of the clade at high latitudes close to the Jurassic-Cretaceous boundary.

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Section: Geological Settingmentioning

confidence: 54%

Section: Taphonomymentioning

confidence: 91%

Section: Geological Settingmentioning

confidence: 99%

“…The specimen was found 14 m above the 'yellow layer' marker bed and 13 m below the Dorsoplanites marker bed (Delsett et al, 2016); locality coordinates 33X E518470 N8696400.…”

Section: Colymbosaurus Svalbardensismentioning

confidence: 99%

See 2 more Smart Citations

Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

Roberts

Druckenmiller

Delsett

et al. 2017

Journal of Vertebrate Paleontology

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“…2e) and methane seep horizons have further revealed a diverse ecosystem of bivalves and echinoderms (Hryniewicz et al 2014 and references therein). Delsett et al (2015) reviewed this current record in the context of its preservation and geological setting.…”

Section: The Jurassicmentioning

confidence: 99%

An introduction to the Mesozoic biotas of Scandinavia and its Arctic territories

Kear

Hurum

Milàn

et al. 2016

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The Mesozoic biotas of Scandinavia have been studied for nearly two centuries. However, the last 15 years have witnessed an explosive advance in research, most notably on the richly fossiliferous Triassic (Olenekian-Carnian) and Jurassic (Tithonian) Lagerstätten of the Norwegian Arctic Svalbard archipelago, Late Cretaceous (Campanian) Kristianstad Basin and Vomb Trough of Skåne in southern Sweden, and the UNESCO heritage site at Stevns Klint in Denmark -the latter constituting one of the most complete Cretaceous-Palaeogene (Maastrichtian -Danian) boundary sections known globally. Other internationally significant deposits include earliest (Induan) and latest Triassic (Norian-Rhaetian) strata from the Danish autonomous territory of Greenland, and the Early Jurassic (Sinemurian-Pliensbachian) to Early Cretaceous (Berriasian) rocks of southern Sweden and the Danish Baltic island of Bornholm, respectively. Marine palaeocommunities are especially well documented, and comprise prolific benthic macroinvertebrates, together with pelagic cephalopods, chondrichthyans, actinopterygians and aquatic amniotes (ichthyopterygians, sauropterygians and mosasauroids). Terrestrial plant remains (lycophytes, sphenophytes, ferns, pteridosperms, cycadophytes, bennettitaleans and ginkgoes), including exceptionally well-preserved carbonized flowers, are also world famous, and are occasionally associated with faunal traces such as temnospondyl amphibian bones and dinosaurian footprints. While this collective documented record is substantial, much still awaits discovery. Thus, Scandinavia and its Arctic territories represent some of the most exciting prospects for future insights into the spectacular history of Mesozoic life and environments.

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Tough to digest: first record of Teleosauroidea (Thalattosuchia) in a regurgitalite from the Upper Jurassic of north‐eastern Italy

Serafini

Gordon

Foffa

et al. 2022

Papers in Palaeontology

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Postcranial remains of a small teleosauroid from the Upper Jurassic of north‐eastern Italy are described in detail. The specimen, discovered in 1980 on a slab of Rosso Ammonitico Veronese (RAV Fm.; Bajocian–Tithonian), is represented by partially articulated thoracic, sacral and anterior caudal vertebrae, fractured and displaced osteoderms and pelvic girdle elements. Additional bone elements overlap one another in a densely packed cluster. The peculiar arrangement of this specimen is here interpreted as the result of regurgitation of the animal carcass from a pelagic predator or scavenger. Microstructural and geochemical evidence from bone and surrounding matrix support this hypothesis. A dearth of phosphorus in the matrix near the bone mass corroborates the interpretation of the specimen as a regurgitalite rather than a coprolite. Calcareous nannofossil and stratigraphic data allow us to assign the fossil to the latest Kimmeridgian or earliest Tithonian. The specimen is here tentatively referred to the teleosauroid subfamily Aeolodontinae based on the alternating pattern of the osteoderm ornamentation; this attribution is supported by stratigraphical and palaeoenvironmental evidence. If confirmed, this represents the first occurrence of Aeolodontinae in Italian outcrops of the western Tethys margin and represents the first marine crocodylomorph described as a bromalite.

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The Slottsmøya marine reptile Lagerstätte : depositional environments, taphonomy and diagenesis

Cited by 29 publications

References 33 publications

Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

An introduction to the Mesozoic biotas of Scandinavia and its Arctic territories

Tough to digest: first record of Teleosauroidea (Thalattosuchia) in a regurgitalite from the Upper Jurassic of north‐eastern Italy

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