恐龍卡第 1342 張，共 2 027 張

Pachypleurosaurus

海生爬蟲類三疊紀中期嚴格來說不是恐龍

Pachypleurosaurus was a small marine reptile that swam in warm, shallow seas during the Triassic Period. It looked a bit like a modern sea lizard and used its long tail to wriggle through the water.1

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 237 百萬年前4

三疊紀中期

化石發現地

Italy and Switzerland4

長度

0.2 到 1 m (0.7 到 3.3 ft)3

最高速度

時速約 9 公里（6 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 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長能在 20 秒內游完一座大泳池（50 公尺）

Pachypleurosaurus 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)

Pachypleurosaurus 時速約 9 公里 (6 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

It swam by wiggling its body and tail from side to side, like a crocodile or a marine iguana.1

Its hind limbs probably acted as rudders to help steer, while its front limbs were becoming more important for paddling.1

Pachypleurosaurus lived during the Middle Triassic, about 247 to 237 million years ago.4

Fossils of Pachypleurosaurus have been found in the Calcare di Meride formation in Italy and Switzerland.4

Scientists think Pachypleurosaurus is closely related to plesiosaurs, the long-necked marine reptiles that came later.1

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

?How big was Pachypleurosaurus?

About 0.2 to 1 metre (0.66 to 3.28 feet) long, similar to a small lizard.3

?What did Pachypleurosaurus eat?

It ate small fish and crustaceans, using its peg-like teeth to grab them.3

?Could Pachypleurosaurus live on land?

No, its limb bones were too small and weak. It was a fully aquatic reptile that stayed in the water.3

給恐龍專家

學名: Pachypleurosaurus
命名者: Broili 19274
類群: 海生爬蟲類
科 / 演化支: Pachypleurosauridae4
分類: Sauropterygia4
岩石的年代: 247 到 237 百萬年 ()4
岩層: Calcare di Meride, Meride, Besano4
國家: 瑞士, 義大利4
化石紀錄: The Paleobiology Database 收錄 5 筆4
發現: Pachypleurosaurus was named by Broili in 1927 based on fossils from the Middle Triassic of Italy and Switzerland.4
仍有爭議: Scientists are still debating how many species of Pachypleurosaurus existed, because the fossils show a lot of variation.2