Simbirskiasaurus: Difference between revisions
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'''''Simbirskiasaurus''''' is an extinct genus of [[ |
'''''Simbirskiasaurus''''' is an extinct genus of [[ichthyosaur]] from the [[Early Cretaceous]] (early [[Barremian]]) of [[Ulyanovsk Province]], [[Russia]].<ref name="sepkoskidatabase">{{cite journal | last = Sepkoski | first = Jack | title = A compendium of fossil marine animal genera (entry on Reptilia) | journal = Bulletins of American Paleontology | volume = 364 |page=560 | date = 2002 | url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=663&rank=class | accessdate = 2008-09-28}}</ref><ref name=F14>Valentin Fischer, Maxim S. Arkhangelsky, Darren Naish, Ilya M. Stenshin, Gleb N. Uspensky and Pascal Godefroit (2014) Simbirskiasaurus and Pervushovisaurus reassessed: implications for the taxonomy and cranial osteology of Cretaceous platypterygiine ichthyosaurs. Zoological Journal of the Linnean Society 171(4): 822–841. http://onlinelibrary.wiley.com/doi/10.1111/zoj.12158/abstract</ref> Its type specimen is '''YKM 65119''', a fragmentary skull and vertebral column.<ref>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.</ref> |
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==Description== |
==Description== |
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Revision as of 02:16, 10 January 2022
| Simbirskiasaurus Temporal range: Early Cretaceous, 130 Ma
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Ichthyosauria |
| Family: | †Ophthalmosauridae |
| Subfamily: | †Platypterygiinae |
| Genus: | †Simbirskiasaurus Ochev and Efimov, 1985 |
| Species | |
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Simbirskiasaurus is an extinct genus of ichthyosaur from the Early Cretaceous (early Barremian) of Ulyanovsk Province, Russia.[1][2] Its type specimen is YKM 65119, a fragmentary skull and vertebral column.[3]
Description
Fischer et al. give the diagnosis of Simbirskiasaurus as follows: "Platypterygiine ophthalmosaurid characterized by the following autapomorphies: external naris divided by a nasomaxillary pillar; posterior opening of the narial complex with anteroposteriorly constricted dorsal extension; deeply interdigitating prefrontal–lacrimal suture [reminiscent of the basal neoichthyosaurian Temnodontosaurus platyodon (Conybeare, 1822); see Godefroit, 1993]. Simbirskiasaurus birjukovi is also characterized by the following unique combination of features: subnarial process of the premaxilla reaches the posterior margin of the external naris (shared with Cryopterygius kristiansenae Druckenmiller et al., 2012); elongated anterior process of the maxilla, reaching anteriorly the level of the nasal [unlike in Aegirosaurus leptospondylus Bardet & Fernández, 2000 and Sveltonectes insolitus (Fischer et al., 2011b)]; pres- ence of a supranarial process of the premaxilla [shared with Platypterygius australis (McCoy, 1867), see Kear, 2005, and possibly Pervushovisaurus bannovkensis (Arkhangelsky, 1998b)]."[2]
See also
References
- ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (entry on Reptilia)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-09-28.
- ^ a b Valentin Fischer, Maxim S. Arkhangelsky, Darren Naish, Ilya M. Stenshin, Gleb N. Uspensky and Pascal Godefroit (2014) Simbirskiasaurus and Pervushovisaurus reassessed: implications for the taxonomy and cranial osteology of Cretaceous platypterygiine ichthyosaurs. Zoological Journal of the Linnean Society 171(4): 822–841. http://onlinelibrary.wiley.com/doi/10.1111/zoj.12158/abstract
- ^ 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.
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