恐龍卡第 0646 張，共 2 027 張

Excalibosaurus

名字的意思： “Excalibur's lizard”1

吃：肉魚龍類侏羅紀早期嚴格來說不是恐龍

Excalibosaurus was a marine reptile that looked like a swordfish. It had a very long upper jaw and a much shorter lower jaw. It swam in the seas of what is now England during the Early Jurassic period.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

200 到 193 百萬年前4

侏羅紀早期

化石發現地

Somerset coast, England1

長度

6.528 m (21 ft)1

最高速度

時速約 42 公里（26 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 7 隻狗從鼻子接到尾巴一樣長跟 36 根香蕉頭尾相接一樣長能在 4.3 秒內游完一座大泳池（50 公尺）

Excalibosaurus 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)

Excalibosaurus 時速約 42 公里 (26 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

Excalibosaurus is known from only two skeletons. The first was found in 1984 on a beach in Somerset, England.1

Its lower jaw was only about three-quarters the length of its upper jaw. This gave it a swordfish-like appearance.1

The larger specimen had a skull 1.54 metres (5 feet 1 inch) long and a total body length of 6.528 metres (21.42 feet).1

Excalibosaurus belongs to a group of ichthyosaurs called Leptonectidae. Its closest relatives are Leptonectes and Eurhinosaurus.1

The name Excalibosaurus comes from the legendary sword Excalibur, because of its long, blade-like upper jaw.1

Excalibosaurus lived during the Sinemurian stage of the Early Jurassic, between about 199.5 and 192.9 million years ago.1 2

The second and more complete skeleton was bought by the Royal Ontario Museum in Canada.1

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

?How big was Excalibosaurus?

The largest known Excalibosaurus was about 6.5 metres (21.4 feet) long, with a skull 1.54 metres (5 feet 1 inch) long.1

?What did Excalibosaurus eat?

Scientists are not sure, but it may have used its long, sword-like upper jaw to slash through schools of fish, like a modern swordfish.3

?Is Excalibosaurus a dinosaur?

No, Excalibosaurus is an ichthyosaur, a marine reptile that lived in the sea, not a dinosaur.1

迷思破解王

迷思： Excalibosaurus is a dinosaur.

真相： Excalibosaurus is not a dinosaur. It is an ichthyosaur, a type of marine reptile that lived in the ocean.1

給恐龍專家

學名: Excalibosaurus
命名者: McGowan 19864
類群: 魚龍類
科 / 演化支: Neoichthyosauria4
分類: Ichthyosauria > Ichthyosauromorpha4
岩石的年代: 200 到 193 百萬年 (Sinemurian)4
國家: 英國4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: The first Excalibosaurus fossil was discovered in 1984 near a beach on the Somerset coast, England. It was described and named by Christopher McGowan in 1986.1
仍有爭議: Scientists are not sure exactly how Excalibosaurus used its long upper jaw. It may have slashed at prey like a swordfish, or used it to probe for food in crevices.1