Preliminary report on ichthyopterygian elements from the Early Triassic (Spathian) of Spitsbergen

Ekeheien, Christina; Delsett, Lene Liebe; Roberts, Aubrey Jane; Hurum, Jørn H.

doi:10.17850/njg98-2-07

Cited by 8 publications

(19 citation statements)

References 26 publications

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“…RiS 6725, 2013/1222-2; RiS 10227, 2015/00326-2; and RiS 10539, 2015/00326-5. The following papers (Bratvold et al, 2018;Ekeheien et al, 2018;Engelschiøn et al, 2018;Hansen et al, 2018;Økland et al, 2018) in this volume will highlight some of the early findings from the vast material still being processed at the museum in Oslo.…”

Section: The Work By the Spitsbergen Mesozoic Research Group At The Natural History Museum In Oslo (2014-now)mentioning

confidence: 99%

The history of exploration and stratigraphy of the Early to Middle Triassic vertebrate-bearing strata of Svalbard (Sassendalen Group, Spitsbergen)

Hurum¹,

Engelschiøn²,

Økland³

et al. 2018

NJG

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The palaeontology of the Lower to Middle Triassic succession in Spitsbergen has been studied for more than a century and a half. Our ability to properly interpret the evolutionary and ecological implications of the faunas requires precise stratigraphic control that has only recently become available. Within such a detailed stratigraphic framework, the Spitsbergen fossil material promises to contribute to our understanding of the faunal recovery after the end-Permian mass extinction.

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Section: The Work By the Spitsbergen Mesozoic Research Group At The Natural History Museum In Oslo (2014-now)mentioning

confidence: 99%

The history of exploration and stratigraphy of the Early to Middle Triassic vertebrate-bearing strata of Svalbard (Sassendalen Group, Spitsbergen)

Hurum¹,

Engelschiøn²,

Økland³

et al. 2018

NJG

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“…Therefore, the diversification and geological radiation of ichthyopterygians occurred quite rapidly because it was not until the P–T boundary that they appeared in a marine environment 54 . Hitherto, large ichthyopterygians that appear to be longer than 5 m have been reported in and above the middle Spathian or are poorly dated 2 , 16 .…”

Section: Discussionmentioning

confidence: 99%

“… 11 , Hansen et al . 17 , Engelschiøn et al 18 , and Ekeheien et al 16 for Svalbard; Massare and Callaway 14 , Scheyer et al . 2 , Kelley et al 15 , Smith et al .…”

Section: Introductionmentioning

confidence: 99%

“…The Lower Triassic lower Vendomdalen Member of the Vikinghøgda Formation in central Spitzbergen, Norway, includes the horizon referred to as ‘ Grippia niveau.’ This bonebed yields ichthyopterygian fossils, most of which are assigned to small ichthyopterygians including Grippia and larger Quasianosteosaurus , plus a disputed ichthyopterygian Omphalosaurus 10 , 16 . Grippia niveau is dated as the lower Spathian ( Bajarunia euomphala zone) or middle Spathian ( Parasibirites grambergi zone) 17 (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Early Triassic ichthyopterygian fossils from the Russian Far East

Nakajima

Shigeta

Houssaye³

et al. 2022

Sci Rep

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Ichthyopterygia is a major clade of reptiles that colonized the ocean after the end-Permian mass extinction, with the oldest fossil records found in early Spathian substage (late Olenekian, late Early Triassic) strata in the western USA. Here, we describe reptilian remains found in situ in the early Spathian Neocolumbites insignis ammonoid zone of South Primorye in the Russian Far East. Specimen NSM PV 23854 comprises fragmentary axial elements exhibiting a combination of morphological characteristics typical of Ichthyopterygia. The cylindrical centra suggest that the specimen represents a basal ichthyopterygian, and its size is comparable to that of Utatsusaurus. Specimen NSM PV 24995 is represented by a single limb bone, which is tentatively identified as an ichthyopterygian humerus. With a body length of approximately 5 m estimated from the humeral length, NSM PV 24995 represents one of the largest specimens of early Spathian marine reptiles known to date. Such size variation among the earliest ichthyopterygians might suggest an explosive diversification in size immediately after the end-Permian mass extinction. Both vertebrae and humerus specimens exhibit an extremely cancellous inner structure, suggesting a high degree of aquatic adaptation in ichthyopterygians, despite their short history of evolution in the ocean.

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“…In 2014, the group discovered a Lower Triassic bonebed deposit on Marmierfjellet in Central Spitsbergen. The deposit contains well-preserved remains of a diverse marine fauna (Bratvold et al, 2018;Ekeheien et al, 2018) whereof the most iconic taxa are the basal ichthyopterygians. The bonebed is located on the western slope of Marmierfjellet within Flowerdalen and consists of disarticulated bone material, teeth, phosphate nodules and partly unconsolidated silty sediment.…”

Section: Introductionmentioning

confidence: 99%

Stratigraphy and age of the Grippia niveau bonebed, Lower Triassic Vikinghøgda Formation, Spitsbergen

Hansen¹,

Hammer²,

Nakrem³

2018

NJG

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We report on a newly excavated Spathian (Lower Triassic) bonebed on Marmierfjellet, Central Spitsbergen. The bonebed contains a varied material of bones and teeth from marine vertebrates along with conodont elements. The fauna of the bonebed could prove interesting in a global context of recovery and speciation after the Late Permian mass extinction. For this reason it is important to place the bonebed in a stratigraphic and chronologic framework. The bonebed sits within the Grippia niveau and is likely to be the one first described by Stensiö in 1921. The bonebed and the Grippia niveau are part of the Vendomdalen Member of the Vikinghøgda Formation. Based on the level in the stratigraphy, the bonebed most likely correlates to the Bajarunia euomphala Zone or the Parasibirites grambergi Zone which makes it either early or early/middle Spathian in age. Some conodont elements from the bonebed are reworked from older sediments but the youngest found are supporting a Spathian age. Vanadium data and TOC content from the bonebed indicate that it was formed under increasingly anoxic conditions.

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Preliminary report on ichthyopterygian elements from the Early Triassic (Spathian) of Spitsbergen

Cited by 8 publications

References 26 publications

The history of exploration and stratigraphy of the Early to Middle Triassic vertebrate-bearing strata of Svalbard (Sassendalen Group, Spitsbergen)

The history of exploration and stratigraphy of the Early to Middle Triassic vertebrate-bearing strata of Svalbard (Sassendalen Group, Spitsbergen)

Early Triassic ichthyopterygian fossils from the Russian Far East

Stratigraphy and age of the Grippia niveau bonebed, Lower Triassic Vikinghøgda Formation, Spitsbergen

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