Baptanodon is an ichthyosaur of the Late Jurassic period (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 in North America. The type species, Sauranodon natans, was originally included under Sauranodon in 1879,[3] but this name was preoccupied.
Baptanodon is a replacement name for Sauranodon applied to ichthyosaur material in 1879[3] and was moved to its own genus Baptanodon in 1880 when Sauranodon was found to be preoccupied.[4]Baptanodon was considered a junior synonym of Ophthalmosaurus by Maisch & Matzke (2000).[5] However, cladistic analyses published in the 2010s indicate that Baptanodon is not congeneric with Ophthalmosaurus icenicus.[6][7][8]
Classification
The cladogram below follows Fischer et al. 2012.[7]
^Gilmore, C. W. (1902). "Discovery of teeth in Baptanodon, an ichthyosaurian from the Jurassic of Wyoming". Science. 16 (414): 913–914. Bibcode:1902Sci....16..913G. doi:10.1126/science.16.414.913. PMID 17756122.
^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 and 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.{{cite journal}}: CS1 maint: uses authors parameter (link)
^ 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. PMID 22235274.
^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: American Journal of Science, 3rd series, v. 34., n. 299, p. 405-406.
January 20, 2023
baptanodon, ichthyosaur, late, jurassic, period, million, years, named, supposed, lack, teeth, although, teeth, this, genus, have, since, been, discovered, graceful, long, dolphin, shaped, body, jaws, were, well, adapted, catching, squid, major, fossil, finds,. Baptanodon is an ichthyosaur of the Late Jurassic period 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 in North America The type species Sauranodon natans was originally included under Sauranodon in 1879 3 but this name was preoccupied BaptanodonTemporal range Late Jurassic 160 156 Ma PreꞒ Ꞓ O S D C P T J K Pg N Scientific classificationKingdom AnimaliaPhylum ChordataClass ReptiliaOrder IchthyosauriaFamily OphthalmosauridaeSubfamily OphthalmosaurinaeGenus BaptanodonMarsh 1880Type species Baptanodon natansMarsh 1880SynonymsOphthalmosaurus natans Marsh 1879 Sauranodon Marsh 1879 preoccupied Microdontosaurus Gilmore 1902 Contents 1 Discovery and species 2 Classification 3 Palaeobiology 4 See also 5 ReferencesDiscovery and species EditBaptanodon is a replacement name for Sauranodon applied to ichthyosaur material in 1879 3 and was moved to its own genus Baptanodon in 1880 when Sauranodon was found to be preoccupied 4 Baptanodon was considered a junior synonym of Ophthalmosaurus by Maisch amp Matzke 2000 5 However cladistic analyses published in the 2010s indicate that Baptanodon is not congeneric with Ophthalmosaurus icenicus 6 7 8 Classification EditThe cladogram below follows Fischer et al 2012 7 Thunnosauria IchthyosaurusStenopterygiusChacaicosaurus Ophthalmosauridae Arthropterygius Ophthalmosaurinae MollesaurusOphthalmosaurusBaptanodonAcamptonectes Platypterygiinae BrachypterygiusMaiaspondylusAegirosaurusSveltonectes Platypterygius hercynicusCaypullisaurusAthabascasaurus Platypterygius australis Longirostria 9 Palaeobiology EditFossils of Baptanodon have been found in the Oxfordian age Sundance Formation of Wyoming which also has yielded fossils of the cryptoclidids Tatenectes and Pantosaurus and the pliosaurid Megalneusaurus 4 10 See also EditList of ichthyosaurs Timeline of ichthyosaur research Paleontology portalReferences Edit Gilmore C W 1902 Discovery of teeth in Baptanodon an ichthyosaurian from the Jurassic of Wyoming Science 16 414 913 914 Bibcode 1902Sci 16 913G doi 10 1126 science 16 414 913 PMID 17756122 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 a b O 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 a b Marsh 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 Beitrage zur Naturkunde Serie B Geologie und Palaontologie 298 1 159 Patrick S Druckenmiller and 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 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint uses authors parameter link a b Valentin 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 PMC 3250416 PMID 22235274 Ilaria Paparella Erin E Maxwell Angelo Cipriani Scilla Roncace 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 American Journal of Science 3rd series v 34 n 299 p 405 406 Retrieved from https en wikipedia org w index php title Baptanodon amp oldid 1126841981, wikipedia, wiki, book, books, library,
