恐龍卡第 0436 張，共 2 027 張

Colymbosaurus

名字的意思： “diver lizard”5

吃：肉蛇頸龍類侏羅紀中期到白堊紀早期嚴格來說不是恐龍

Colymbosaurus was a plesiosaur, a marine reptile that swam in the seas with a long neck and flippers. It was not a dinosaur, but a fierce hunter of the ocean.5

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

168 到 113 百萬年前5

侏羅紀中期到白堊紀早期

化石發現地

Fossils of Colymbosaurus have been found in the United Kingdom, Norway, France, and Russia.5

長度

6 m (20 ft)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？

跟 6 隻狗從鼻子接到尾巴一樣長跟 33 根香蕉頭尾相接一樣長能在 6.7 秒內游完一座大泳池（50 公尺）

Colymbosaurus 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)

Colymbosaurus 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

Colymbosaurus lived from about 168 to 113 million years ago, during the Jurassic and Cretaceous periods.5

It belonged to a group called Cryptoclididae, which were plesiosaurs with long necks and small heads.1

There were at least two valid species: Colymbosaurus megadeirus and Colymbosaurus svalbardensis.1

Colymbosaurus trochanterius is not considered a valid species, but some fossils are still referred to Colymbosaurus.1

Fossils have been found in the Kimmeridge Clay Formation in the UK, which was a shallow sea at the time.1

Colymbosaurus was actively mobile and lived in the water, likely swimming near the surface.5

Colymbosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Colymbosaurus 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 Colymbosaurus 最常被問的問題

?What did Colymbosaurus eat?

It was a carnivore, meaning it ate meat, such as fish and other sea creatures. It lived in the ocean and was a skilled hunter.5

?How big was Colymbosaurus?

Scientists are not sure of its exact size, but it was a medium-sized plesiosaur. It had a long neck and flippers for swimming.3

?Where was Colymbosaurus found?

Fossils have been found in the UK and Svalbard, Norway. They come from rocks that were once a shallow sea.4 3

?Is Colymbosaurus a dinosaur?

No, it is a plesiosaur, which is a marine reptile that lived in the sea. It is not a dinosaur.3

迷思破解王

迷思： Some people think Colymbosaurus was a dinosaur.

真相： Colymbosaurus was a plesiosaur, a marine reptile, not a dinosaur.5

給恐龍專家

學名: Colymbosaurus
命名者: Seeley 18745
類群: 蛇頸龍類
科 / 演化支: Cryptoclididae5
分類: Plesiosauria > Sauropterygia5
岩石的年代: 168 到 113 百萬年 (Bathonian / Aptian)5
岩層: Kimmeridge Clay, Portland Stone, Agardhfjellet5
國家: 英國, 挪威, 法國, 俄羅斯5
化石紀錄: The Paleobiology Database 收錄 18 筆5
發現: Colymbosaurus was named by Harry Seeley in 1874 based on fossils from the UK.5
仍有爭議: Scientists debate which species belong to Colymbosaurus, because some fossils are incomplete and hard to compare.1