| Janusaurus Temporal range:
Tithonian
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†Janusaurus Roberts et al.,
2014
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†Janusaurus lundi Roberts et al., 2014
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Janusaurus is an extinct genus of ophthalmosaurid ichthyosaur from the Upper Jurassic Slottsmøya Member, Agardhfjellet Formation of Central Spitsbergen. The holotype consists of a partial skull and postcrania, and would have belonged to an individual measuring 3–4 m (9.8–13.1 ft) long. [2] In 2019, Janusaurus was synonymized with Arthropterygius, though maintained as a separate species, by Nikolay Zverkov and Natalya Prilepskaya, [3] although this synonymy was objected to later that same year by Lene Delsett and colleagues, who maintained that they were sufficiently different to warrant separate genera. [4]
Gallery
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Restored skull -
Video presentation
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Map of fossil locality
See also
References
- ^ "Janusaurus at Fossilworks". Paleobiology Database. Fossilworks. Retrieved 17 December 2021.
- ^ Roberts, A. J.; Druckenmiller, P. S.; Sætre, G. P.; Hurum, J. H. (2014). "A New Upper Jurassic Ophthalmosaurid Ichthyosaur from the Slottsmøya Member, Agardhfjellet Formation of Central Spitsbergen". PLOS ONE. 9 (8): e103152. Bibcode: 2014PLoSO...9j3152R. doi: 10.1371/journal.pone.0103152. PMC 4118863. PMID 25084533.
- ^ Zverkov, N. G.; Prilepskaya, N. E. (2019). "A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm". PeerJ. 7: e6799. doi: 10.7717/peerj.6799. PMC 6497043. PMID 31106052.
- ^ Delsett, L. L.; Roberts, A. J.; Druckenmiller, P. S.; Hurum, J. H. (2019). "Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)". Acta Palaeontologica Polonica. 64 (4): 717–743. doi: 10.4202/app.00571.2018. hdl: 10852/76089. S2CID 210294877.
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