Arthropterygius
Arthropterygius Temporal range: Late Jurassic
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Cranial elements of A. chrisorum | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | †Ichthyosauria |
Family: | †Ophthalmosauridae |
Genus: | †Arthropterygius Maxwell, 2010 |
Type species | |
†Arthropterygius chrisorum (Russel, 1993 [originally Ophthalmosaurus])
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Other species | |
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Arthropterygius is an extinct genus of ophthalmosaurid ichthyosaur which existed in Canada, Spitsbergen, Russia and possibly Norway during the late Jurassic period.
Classification
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Arthropterygius_volgensis_cranial_elements.png/170px-Arthropterygius_volgensis_cranial_elements.png)
It contains the type species Arthropterygius chrisorum, named in 2010 by Erin E. Maxwell. Arthropterygius is the generic replacement name for Ophthalmosaurus chrisorum, named in 1993 from fossils found on Melville Island in the Northwest Territories. Its fossils are the most complete of any ichthyosaur in the Canadian Arctic. A. chrisorum has several features that separate it from the genus Ophthalmosaurus, including a highly angled articulation between the radius and ulna and the humerus and a foramen for the internal carotid artery (a major artery that supplies blood to the brain) on the posterior surface of the basisphenoid. Maxwell 2010 found it to be the sister taxon of Caypullisaurus, an ophthalmosaurid from Argentina.[2] However, many recent cladistic analyses found it to be the basalmost member of the Ophthalmosauridae.[3][4]
Zverkov and Prilepskaya (2019) synonymize Janusaurus, Palvennia, and Keilhauia with Arthropterygius.[5]
The following cladogram shows a possible phylogenetic position of Arthropterygius in Ophthalmosauridae according to an analysis done by Zverkov and Prilepskaya in 2019.[5]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Arthropterygius_Scale.svg/220px-Arthropterygius_Scale.svg.png)
Ophthalmosauridae |
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See also
References
- ^ Lene Liebe Delsett; Aubrey J. Roberts; Patrick S. Druckenmiller; Jørn H. Hurum (2017). "A New Ophthalmosaurid (Ichthyosauria) from Svalbard, Norway, and Evolution of the Ichthyopterygian Pelvic Girdle". PLoS ONE. 12 (1): e0169971. Bibcode:2017PLoSO..1269971D. doi:10.1371/journal.pone.0169971. PMC 5266267. PMID 28121995.
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: CS1 maint: unflagged free DOI (link) - ^ Maxwell, E.E. (2010). "Generic reassignment of an ichthyosaur from the Queen Elizabeth Islands, Northwest Territories, Canada". Journal of Vertebrate Paleontology. 30 (2): 403–415. doi:10.1080/02724631003617944.
- ^ Fischer, Valentin; Edwige Masure; Maxim S. Arkhangelsky; Pascal Godefroit (2011). "A new Barremian (Early Cretaceous) ichthyosaur from western Russia". Journal of Vertebrate Paleontology. 31 (5): 1010–1025. doi:10.1080/02724634.2011.595464.
- ^ Valentin Fischer; Michael W. Maisch; Darren Naish; Ralf Kosma; Jeff Liston; Ulrich Joger; Fritz J. Krüger; Judith Pardo Pérez; Jessica Tainsh; Robert M. Appleby (2012). "New Ophthalmosaurid Ichthyosaurs from the European Lower Cretaceous Demonstrate Extensive Ichthyosaur Survival across the Jurassic–Cretaceous Boundary". PLoS ONE. 7 (1): e29234. Bibcode:2012PLoSO...729234F. doi:10.1371/journal.pone.0029234. PMC 3250416. PMID 22235274.
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: CS1 maint: unflagged free DOI (link) - ^ a b Zverkov, Nikolay G.; Prilepskaya, Natalya 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.
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: CS1 maint: unflagged free DOI (link)