恐龍卡第 0029 張，共 2 027 張

Aegirosaurus

名字的意思： “Aegir's lizard, named after Aegir, the Teutonic god of the ocean”1

吃：肉魚龍類侏羅紀晚期到白堊紀早期嚴格來說不是恐龍

Aegirosaurus was a sleek, dolphin-like marine reptile that swam in the warm seas of Europe during the time of the dinosaurs. It had a long, slender snout packed with tiny, sharp teeth for catching fish and squid.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

149 到 133 百萬年前3

侏羅紀晚期到白堊紀早期

化石發現地

Bavaria, Germany (Solnhofen limestone) and southeastern France (Drôme department)1 3

長度

1.77 到 2 m (5.8 到 6.6 ft)1

最高速度

時速約 41 公里（25 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 4 隻家貓從鼻子接到尾巴一樣長跟 11 根香蕉頭尾相接一樣長能在 4.4 秒內游完一座大泳池（50 公尺）

Aegirosaurus 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)

Aegirosaurus 時速約 41 公里 (25 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

Aegirosaurus had a very long snout that made up 62 to 73 percent of its lower jaw length.1

Its front flippers were narrow and elongated, but its hind flippers were wide because of extra soft tissue.1

Aegirosaurus had a crescent-shaped tail fin, like a fish, to help it swim fast.1

Fossils of Aegirosaurus show skin impressions, including what might be tiny scales on the upper part of its tail fin.1

This ichthyosaur lived from the Late Jurassic to the Early Cretaceous, about 149 to 133 million years ago.3

Aegirosaurus is one of the few ichthyosaurs known from the Valanginian stage of the Early Cretaceous.1

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

?How big was Aegirosaurus?

Aegirosaurus was a medium sized ichthyosaur. The largest known specimen was about 2 metres (6.6 ft) long, and a complete skeleton is 1.77 metres (5.8 ft) long.1

?What did Aegirosaurus eat?

Aegirosaurus ate small fish and squid. Its long, slender snout was packed with tiny, sharp teeth, and its tooth wear suggests it was a generalist feeder.1

?When did Aegirosaurus live?

Aegirosaurus lived from the Late Jurassic to the Early Cretaceous, about 149 to 133 million years ago.1

?Where was Aegirosaurus found?

Fossils of Aegirosaurus have been found in Germany and France. Its remains were discovered in the Solnhofen limestone of Bavaria, Germany, and in southeastern France.1

迷思破解王

迷思： Aegirosaurus was a dinosaur.

真相： Aegirosaurus was an ichthyosaur, a marine reptile that lived in the sea, not a dinosaur. Dinosaurs lived on land.1

給恐龍專家

學名: Aegirosaurus
命名者: Bardet and Fernandez 20003
類群: 魚龍類
科 / 演化支: Ophthalmosauridae3
分類: Ichthyosauria > Ichthyosauromorpha3
岩石的年代: 149 到 133 百萬年 (Tithonian / Valanginian)3
岩層: Solnhofen3
國家: 德國, 法國3
化石紀錄: The Paleobiology Database 收錄 3 筆3
發現: The first fossil was named Ichthyosaurus leptospondylus by Wagner in 1853. In 2000, scientists Bardet and Fernández gave it the new genus name Aegirosaurus after studying a nearly complete skeleton with soft tissue impressions.1 2
仍有爭議: Scientists are not sure whether Aegirosaurus had scales on its tail fin, because only one fossil shows possible scale impressions.1