恐龍卡第 0101 張，共 2 027 張

Anarosaurus

吃：肉海生爬蟲類三疊紀中期嚴格來說不是恐龍

Anarosaurus was a small, swimming reptile that lived in the sea during the Middle Triassic, about 247 to 241 million years ago. It was not a dinosaur, but a cousin of plesiosaurs, with flippers and a long tail.1 2

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

247 到 241 百萬年前2

三疊紀中期

化石發現地

Fossils have been found in Germany and the Netherlands, in rocks from the Middle Triassic.1 2

長度

0.5 到 0.6 m (1.6 到 2 ft)1

最高速度

時速約 5 公里（3 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 3 根香蕉頭尾相接一樣長能在 36 秒內游完一座大泳池（50 公尺）

Anarosaurus 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)

Anarosaurus 時速約 5 公里 (3 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 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

Anarosaurus was tiny, only about 50 to 60 cm (1.6 to 2.0 ft) long, smaller than a modern cat.1

It had two different species: Anarosaurus pumilio and Anarosaurus heterodontus, which had different tooth shapes.1

The name Anarosaurus means 'without lizard' in Greek, but scientists are not sure why it was given that name.1

Anarosaurus lived in a shallow sea that covered parts of Europe during the Triassic, and its fossils are found in rocks that were once seafloor.1

The first fossil of Anarosaurus was found in Germany, but the original specimen was lost or destroyed during World War II.1

Anarosaurus is a pachypleurosaur, a group of small, primitive sauropterygians that were ancestors of the giant plesiosaurs.1

Anarosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Anarosaurus 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。

給恐龍專家

學名: Anarosaurus
命名者: Dames 18902
類群: 海生爬蟲類
科 / 演化支: Pachypleurosauridae2
分類: Sauropterygia2
岩石的年代: 247 到 241 百萬年 ()2
岩層: Vossenveld, Jena2
國家: 荷蘭, 德國2
化石紀錄: The Paleobiology Database 收錄 4 筆2
發現: Anarosaurus was named by German paleontologist Wilhelm Dames in 1890, based on fossils found in Germany. The type species is Anarosaurus pumilio.1 2
仍有爭議: Scientists are still debating exactly how Anarosaurus swam and what it ate, because its skeleton is incomplete and some fossils were lost.1