恐龍卡第 1403 張，共 2 027 張

Peloneustes

名字的意思： “mud swimmer”1

吃：魚蛇頸龍類侏羅紀中期嚴格來說不是恐龍

Peloneustes was a pliosaur, a kind of short-necked plesiosaur that lived in a shallow sea. It had a long, narrow snout like a dolphin and many sharp teeth for catching fish. This marine reptile was a fast and fierce hunter in 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

165 到 162 百萬年前3

侏羅紀中期

化石發現地

England, France, and Germany3 1

長度

3.5 到 4.34 m (11 到 14 ft)1 2

體重

1 公噸 (2,200 lb)1

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 4 隻狗從鼻子接到尾巴一樣長跟 24 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）

Peloneustes 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)

Peloneustes 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

Peloneustes lived about 165 to 161 million years ago during the Middle Jurassic period.3

Its name means 'mud swimmer' because its fossils were found in mud from an ancient sea.1

Peloneustes had a long, narrow snout that was shaped like a dolphin's beak. This helped it move quickly through the water.1

It had 30 to 31 teeth in its upper jaw and 36 to 44 teeth in its lower jaw. The teeth were sharp and slightly curved for piercing fish.2

Peloneustes shared its sea home with other marine reptiles like ichthyosaurs and other plesiosaurs. At least five different pliosaurids lived in the same area.1

The sea where Peloneustes swam was only about 30 to 50 metres (100 to 160 feet) deep. It was a shallow inland sea.1

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

?How big was Peloneustes?

Peloneustes was about 3.5 to 4 metres (11 to 13 feet) long. This is small for a pliosaurid.1

?What did Peloneustes eat?

Peloneustes ate fish. It had a long, narrow snout and many sharp teeth for piercing fish, and it would swing its head quickly to catch them.1

?When did Peloneustes live?

Peloneustes lived during the Middle Jurassic period, about 165 to 161 million years ago. Its fossils are from the Oxford Clay Formation in England.1

?Was Peloneustes a dinosaur?

No, Peloneustes was a plesiosaur, a marine reptile, not a dinosaur. It lived in the sea and used its flippers to swim.1

給恐龍專家

學名: Peloneustes
命名者: Lydekker 18893
類群: 蛇頸龍類
科 / 演化支: Pliosauridae3
分類: Plesiosauria > Pliosauridae > Sauropterygia3
岩石的年代: 165 到 162 百萬年 (Callovian)3
岩層: Oxford Clay, Ornatenton, Argiles de Montaubert3
國家: 英國, 法國, 德國3
化石紀錄: The Paleobiology Database 收錄 12 筆3
發現: Peloneustes was first described as a species of Plesiosaurus by Harry Govier Seeley in 1869. Richard Lydekker gave it its own genus name in 1889.1
仍有爭議: Scientists are not sure if Peloneustes was a close relative of Pliosaurus or a more early-diverging pliosaurid. They are still studying its family tree.1