恐龍卡第 0423 張，共 2 027 張

Cimoliasaurus

名字的意思： “white chalk lizard”1

吃：肉蛇頸龍類侏羅紀晚期到白堊紀晚期嚴格來說不是恐龍

Cimoliasaurus was a long-necked marine reptile that swam in the seas during the time of the dinosaurs. It was not a dinosaur, but a plesiosaur, a type of ancient sea creature. With its strong flippers, it glided through the water hunting for fish and other prey.1 4

趣味小知識：這種海生爬蟲類在海裡游泳的時候，恐龍正在陸地上走路。大家都叫牠們恐龍，但牠們其實是爬蟲類的另一個分支。

生存年代

155 到 66 百萬年前4

侏羅紀晚期到白堊紀晚期

化石發現地

New Jersey, North Carolina, and Maryland, USA1

長度

5 到 7.6 m (16 到 25 ft)2

體重

1 公噸 (2,200 lb)2

最高速度

時速約 27 公里（17 英里）

游泳, 估計值

牠生活在什麼時候？

三疊紀

侏羅紀

白堊紀

2 億 5200 萬年前20114566，小行星撞地球

牠有多大？

牠有多長？

牠有多重？

跟 50 隻狗一樣重

跟 8 隻狗從鼻子接到尾巴一樣長跟 42 根香蕉頭尾相接一樣長跟 200 顆西瓜一樣重跟 53 個幼兒園小朋友一樣重跟 31 個小學生一樣重跟 2 隻北極熊一樣重能在 6.7 秒內游完一座大泳池（50 公尺）

Cimoliasaurus 跟「你」比起來有多大？

只是在你的瀏覽器裡算算數學。什麼都不會被儲存或傳送出去。

牠有多快？

走路的人 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 mph)

Cimoliasaurus 時速約 27 公里 (17 mph)

一匹飛奔的馬 時速約 65 公里 (40 mph)

一隻獵豹 時速約 100 公里 (62 mph)

酷東西

趣味知識

The name Cimoliasaurus means 'white chalk lizard' because its fossils were found in rocks that look like the white chalk of England.1

Cimoliasaurus lived during the Late Cretaceous period, about 70 to 66 million years ago.1

The first fossils of Cimoliasaurus were vertebrae (back bones) found in New Jersey in 1851.1

Cimoliasaurus belongs to the family Elasmosauridae, which includes some of the longest-necked plesiosaurs.1

A possible Cimoliasaurus vertebra was found by a schoolboy named Colin McEwen during a field trip in Maryland in 1988.1

Some scientists once thought Cimoliasaurus was a different kind of reptile, but now they agree it is an elasmosaurid plesiosaur.1

Cimoliasaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Cimoliasaurus 可能的樣子。這只是猜測：真正的動物可能長得不一樣，也沒有人知道牠真正的顏色。

你們都在問

關於 Cimoliasaurus 最常被問的問題

?What did Cimoliasaurus eat?

It was an aquatic carnivore, meaning it ate meat like fish and other sea creatures.4

?How big was Cimoliasaurus?

Nobody knows for sure because only vertebrae and teeth have been found. The vertebrae range from 2.5 to 10 cm long, so it was a medium-sized plesiosaur.3

?Where was Cimoliasaurus found?

Its fossils have been found in New Jersey, North Carolina, and Maryland in the United States.1

給恐龍專家

學名: Cimoliasaurus
命名者: Leidy 18514
類群: 蛇頸龍類
科 / 演化支: Elasmosauridae4
分類: Plesiosauria > Elasmosauridae > Sauropterygia4
岩石的年代: 155 到 66 百萬年 (Kimmeridgian / Maastrichtian)4
岩層: Navesink, Severn, Eagle Ford4
國家: 美國, 英國, 加拿大, 澳洲, 智利, 捷克4
化石紀錄: The Paleobiology Database 收錄 18 筆4
又名: Hunosaurus, Iserosaurus （舊名稱現在也算作同一種動物）4
發現: Cimoliasaurus was named by the American paleontologist Joseph Leidy in 1851. He described it from a set of neck vertebrae found in greensand deposits in Burlington County, New Jersey.1
仍有爭議: Scientists are not sure exactly how big Cimoliasaurus was, because only a few bones have been found so far.1