Plutoniosaurus
Plutoniosaurus is an extinct genus of ophthalmosaurid ichthyosaur from the Early Cretaceous (late Hauterivian) of the vicinity of Ulyanovsk, European Russia.
| Plutoniosaurus Temporal range: Early Cretaceous, 135-130 Ma | |
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| Genus: | †Plutoniosaurus Efimov, 1997 |
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Taxonomy
The holotype is UPM 2/740, a partial skeleton.[1]
Plutoniosaurus is possibly the same species as the nearly coeval Simbirskiasaurus.[2] Zverkov and Efimov (2019) recover Plutoniosaurus in the polytomy with the Platypterygius type species and Leninia.[3]
Phylogeny
The following cladogram shows a possible phylogenetic position of Plutoniosaurus in Ophthalmosauridae according to the analysis performed by Zverkov and Jacobs (2020).[4]
| Ophthalmosauria |
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References
- Storrs, G. W., M. S. Arkhangel'skii and V. M. Efimov. 2000. Mesozoic marine reptiles of Russia and other former Soviet republics. pages 187-210 In Benton, M. J., M. A. Shiskin, D. M. Unwin and E. N. Kurochkin, (eds.), The Age of Dinosaurs in Russia and Mongolia, Cambridge University Press, Cambridge.
- Valentin Fischer et al. 2016. Extinction of fish-shaped marine reptiles associated with reduced evolutionary rates and global environmental volatility. Nature Communications 7, article number: 10825; doi: 10.1038/ncomms10825
- Nikolay G. Zverkov; Vladimir M. Efimov (2019). Revision of Undorosaurus, a mysterious Late Jurassic ichthyosaur of the Boreal Realm. Journal of Systematic Palaeontology. in press. doi:10.1080/14772019.2018.1515793.
- Nikolay G. Zverkov & Megan L. Jacobs (2021) [2020]. "Revision of Nannopterygius (Ichthyosauria: Ophthalmosauridae): reappraisal of the 'inaccessible' holotype resolves a taxonomic tangle and reveals an obscure ophthalmosaurid lineage with a wide distribution". Zoological Journal of the Linnean Society. 191 (1): 228–275. doi:10.1093/zoolinnean/zlaa028.
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