Baptanodon
| Baptanodon Temporal range:Late Jurassic,
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|---|---|
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| HolotypeskullofB. natans | |
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Ichthyosauria |
| Family: | †Ophthalmosauridae |
| Subfamily: | †Ophthalmosaurinae |
| Genus: | †Baptanodon Marsh,1880 |
| Type species | |
| †Baptanodon natans Marsh, 1880
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| Synonyms | |
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Baptanodonis anichthyosaurof theLate Jurassicperiod (160-156 million years ago), named for its supposed lack of teeth (although teeth of this genus have since been discovered).[1]It had a graceful 3.5 m (11 ft) long dolphin-shaped body, and its jaws were well adapted for catching squid.[2]Major fossil finds of this genus have been recorded inNorth America.The type species,Sauranodon natans,was originally included underSauranodonin 1879,[3]but this name was preoccupied.
Discovery and species
[edit]Baptanodonis a replacement name forSauranodonapplied to ichthyosaur material in 1879[3]and was moved to its own genusBaptanodonin 1880 whenSauranodonwas found to be preoccupied.[4] Baptanodonwas considered ajunior synonymofOphthalmosaurusby Maisch & Matzke (2000).[5]However, cladistic analyses published in the 2010s indicate thatBaptanodonis not congeneric withOphthalmosaurus icenicus.[6][7][8]
Classification
[edit]The cladogram below follows Fischeret al.2012.[7]
| Thunnosauria |
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Palaeobiology
[edit]Fossils ofBaptanodonhave been found in the Oxfordian-ageSundance Formationof Wyoming, which also has yielded fossils of the cryptoclididsTatenectesandPantosaurus,and the pliosauridMegalneusaurus.[4][10]
See also
[edit]
References
[edit]- ^Gilmore, C. W. (1902)."Discovery of teeth inBaptanodon,an ichthyosaurian from the Jurassic of Wyoming ".Science.16(414): 913–914.Bibcode:1902Sci....16..913G.doi:10.1126/science.16.414.913.PMID17756122.
- ^Massare, J.A.; Wahl, W.R.; Ross, M.; Connely, M.V. (2014). "Palaeoecology of the marine reptiles of the Redwater Shale Member of the Sundance Formation (Jurassic) of central Wyoming, USA".Geological Magazine.151(1): 167–182.doi:10.1017/S0016756813000472.
- ^abO. C. Marsh. 1879. A new order of extinct reptiles (Sauranodonta), from the Jurassic Formation of the Rocky Mountains.The American Journal of Science and Arts, series 3
- ^abMarsh, O. C., 1880, Note on Sauranodon:American Journal of Science, 3rd series,v. 19, n. 4, p. 491.
- ^Maisch MW, Matzke AT. 2000. The Ichthyosauria.Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie)298:1-159.
- ^Patrick S. Druckenmiller; Erin E. Maxwell (2010). "A new Lower Cretaceous (lower Albian) ichthyosaur genus from the Clearwater Formation, Alberta, Canada".Canadian Journal of Earth Sciences.47(8): 1037–1053.Bibcode:2010CaJES..47.1037D.doi:10.1139/E10-028.
- ^abValentin Fischer; et al. (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.PMC3250416.PMID22235274.
- ^Ilaria Paparella; Erin E. Maxwell; Angelo Cipriani; Scilla Roncacè; Michael W. Caldwell (2017). "The first ophthalmosaurid ichthyosaur from the Upper Jurassic of the Umbrian–Marchean Apennines (Marche, Central Italy)".Geological Magazine.154 (4): 837–858. doi:10.1017/S0016756816000455.
- ^Arkhangel’sky, M. S., 1998, On the Ichthyosaurian Genus Platypterygius: Palaeontological Journal, v. 32, n. 6, p. 611-615.
- ^Marsh, O. C., 1895, The Reptilia of the Baptanodon Beds: AmericanJournal of Science, 3rd series,v. 34., n. 299, p. 405-406.
