白堊龍（學名：Cimoliasaurus）是蛇頸龍亞目的一屬，生存於白堊紀早期（阿普第階）到晚期（馬斯垂克階）的紐澤西州、紐西蘭、英格蘭、法國。白堊龍的身長為13公尺到25公尺。
參考資料
https://web.archive.org/web/20080414142638/http://www.palaeos.com/Vertebrates/Units/220Lepidosauromorpha/220.820.html#Cimoliasaurus http://www.geocities.com/dannsdinosaurs/mar-cimo.html
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