無齒潛魚龍屬

無齒潛魚龍屬; 化石時期：晚侏羅世，160–156 Ma PreЄ Є O S D C P T J K Pg N ▼
	泅泳無齒潛魚龍正模顱骨
科學分類
界：	動物界 Animalia
門：	脊索動物門 Chordata
綱：	爬蟲綱 Reptilia
目：	†魚龍目 Ichthyosauria
科：	†大眼魚龍科 Ophthalmosauridae
亞科：	†大眼魚龍亞科 Ophthalmosaurinae
屬：	†無齒潛魚龍屬 Baotanodon; Marsh, 1880
模式種
	†泅泳無齒潛魚龍; Baptanodon natans; Marsh, 1880
異名
	泅泳大眼魚龍 Ophthalmosaurus natans ; Marsh, 1879; 無齒魚龍 Sauranodon ; Marsh, 1879（復名）; 微齒魚龍 Microdontosaurus ; Gilmore, 1902;

無齒潛魚龍（學名：Baptanodon）是種生存於晚侏羅世（1.6至1.56億年前）的魚龍目，得名自其缺少牙齒的猜測（該屬牙齒現已發現）。^[1]無齒潛魚龍擁有3.5米（11英尺）長的海豚狀身體，雙顎非常適合捕捉魷魚。^[2]該屬化石主要在北美發現。模式種泅泳無齒潛魚龍（Baptanodon natans）原於1879年歸入無齒魚龍（Sauranodon），^[3]但因此名已被占用而改名。

發現及物種

無齒潛魚龍是1879年命名的「無齒魚龍」的替換名，^[3]當時發現此名已被占用，故於1880年將屬名改為「無齒潛魚龍」。^[4]邁施與馬茨凱（2000年）認為無齒潛魚龍是大眼魚龍的次異名。^[5]但2010年發表的一項研究顯示無齒潛魚龍和艾森尼大眼魚龍（Ophthalmosaurus icenicus）並非屬於同一個屬。^[6]^[7]^[8]

分類

以下分支圖遵循費舍等人2012年的研究。^[7]

鮪魚龍類 Thunnosauria

魚龍 Ichthyosaurus

狹翼魚龍 Stenopterygius

喬開科魚龍 Chacaicosaurus

大眼魚龍科 Ophthalmosauridae

關節鰭魚龍 Arthropterygius

*

大眼魚龍亞科 Ophthalmosaurinae

莫勒斯魚龍 Mollesaurus

大眼魚龍 Ophthalmosaurus

	無齒潛魚龍 Baptanodon

	實泳魚龍 Acamptonectes

扁鰭魚龍亞科 Platypterygiinae

短鰭魚龍 Brachypterygius

慈母椎龍 Maiaspondylus

	阿戈爾魚龍 Aegirosaurus

	巧泳魚龍 Sveltonectes

「哈茨山扁鰭魚龍」 "Platypterygius" hercynicus

礁靈魚龍 Caypullisaurus

	阿薩巴斯卡魚龍 Athabascasaurus

	「南方扁鰭魚龍」（=長喙魚龍 Longirostria^[9]） "Platypterygius" australis

古生物學

無齒潛魚龍化石發現於懷俄明州牛津期的桑當斯組（英語：Sundance Formation），該地層亦出土了淺隱龍科的泰特泳龍（英語：Tatenectes）和泛蜥龍及上龍科巨游龍的化石。^[4]^[10]

參見

魚龍列表
魚龍類研究歷史（英語：Timeline of ichthyosaur research）

參考資料

^ Gilmore, C. W. Discovery of teeth in Baptanodon, an ichthyosaurian from the Jurassic of Wyoming. Science. 1902, 16 (414): 913–914. Bibcode:1902Sci....16..913G. PMID 17756122. doi:10.1126/science.16.414.913.
^ Massare, J.A.; Wahl, W.R.; Ross, M.; Connely, M.V. Palaeoecology of the marine reptiles of the Redwater Shale Member of the Sundance Formation (Jurassic) of central Wyoming, USA. Geological Magazine. 2014, 151 (1): 167–182. doi:10.1017/S0016756813000472.
^ ^3.0 ^3.1 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
^ ^4.0 ^4.1 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 Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) 298: 1-159.
^ Patrick S. Druckenmiller; Erin E. Maxwell. A new Lower Cretaceous (lower Albian) ichthyosaur genus from the Clearwater Formation, Alberta, Canada. Canadian Journal of Earth Sciences. 2010, 47 (8): 1037–1053. Bibcode:2010CaJES..47.1037D. doi:10.1139/E10-028.
^ ^7.0 ^7.1 Valentin Fischer; et al. New Ophthalmosaurid Ichthyosaurs from the European Lower Cretaceous Demonstrate Extensive Ichthyosaur Survival across the Jurassic–Cretaceous Boundary. PLOS ONE. 2012, 7 (1): e29234. Bibcode:2012PLoSO...729234F. PMC 3250416  . PMID 22235274. doi:10.1371/journal.pone.0029234  .
^ 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.

[Gimore1902-1] Gilmore, C. W. Discovery of teeth in Baptanodon, an ichthyosaurian from the Jurassic of Wyoming. Science. 1902, 16 (414): 913–914. Bibcode:1902Sci....16..913G. PMID 17756122. doi:10.1126/science.16.414.913.

[2] Massare, J.A.; Wahl, W.R.; Ross, M.; Connely, M.V. Palaeoecology of the marine reptiles of the Redwater Shale Member of the Sundance Formation (Jurassic) of central Wyoming, USA. Geological Magazine. 2014, 151 (1): 167–182. doi:10.1017/S0016756813000472.

[Marsh1879-3] 3.0 ^3.1 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

[Marsh1880-4] 4.0 ^4.1 Marsh, O. C., 1880, Note on Sauranodon: American Journal of Science, 3rd series, v. 19, n. 4, p. 491.

[Maisch_&_Matzke,_2000-5] Maisch MW, Matzke AT. 2000. The Ichthyosauria. Stuttgarter Beiträge zur Naturkunde, Serie B (Geologie und Paläontologie) 298: 1-159.

[DM10-6] Patrick S. Druckenmiller; Erin E. Maxwell. A new Lower Cretaceous (lower Albian) ichthyosaur genus from the Clearwater Formation, Alberta, Canada. Canadian Journal of Earth Sciences. 2010, 47 (8): 1037–1053. Bibcode:2010CaJES..47.1037D. doi:10.1139/E10-028.

[Acamptonectes-7] 7.0 ^7.1 Valentin Fischer; et al. New Ophthalmosaurid Ichthyosaurs from the European Lower Cretaceous Demonstrate Extensive Ichthyosaur Survival across the Jurassic–Cretaceous Boundary. PLOS ONE. 2012, 7 (1): e29234. Bibcode:2012PLoSO...729234F. PMC 3250416  . PMID 22235274. doi:10.1371/journal.pone.0029234  .

[8] 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.

[Platypterygius-9] Arkhangel’sky, M. S., 1998, On the Ichthyosaurian Genus Platypterygius: Palaeontological Journal, v. 32, n. 6, p. 611-615.

[10] Marsh, O. C., 1895, The Reptilia of the Baptanodon Beds: American Journal of Science, 3rd series, v. 34., n. 299, p. 405-406.

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