始雙臼椎龍屬(學名:Eopolycotylus)是蛇頸龍目雙臼椎龍科的一屬,化石被發現於美國猶他州的白堊紀晚期地層。始雙臼椎龍具有類似雙臼椎龍的共有衍徵,雙臼椎龍是生存於森諾曼階到土侖階的近親。
參考資料
- Albright, L.B. III; Gillette, D.D.; and Titus, A.L. Plesiosaurs from the Upper Cretaceous (Cenomanian-Turonian) Tropic Shale of southern Utah, Part 2: Polycotylidae. Journal of Vertebrate Paleontology. 2007, 27 (1): 41–58. ISSN 0272-4634. doi:10.1671/0272-4634(2007)27[41:PFTUCC]2.0.CO;2.
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