恐龍卡第 1664 張，共 2 027 張

Simosaurus

名字的意思： “snouted lizard”1

吃：肉海生爬蟲類三疊紀中期到三疊紀晚期嚴格來說不是恐龍

Simosaurus was a marine reptile that swam in warm, shallow seas during the Middle Triassic, about 240 to 230 million years ago. It had a blunt, flattened head and blunt teeth for crushing hard-shelled prey like clams and ammonites.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 201 百萬年前3

三疊紀中期到三疊紀晚期

化石發現地

France and Germany, with additional fossils from Italy, Israel, and Saudi Arabia1 3

長度

3 到 4 m (9.8 到 13 ft)1

體重

113 kg 到 129 kg (249 到 284 lb)2

最高速度

時速約 23 公里（14 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 6 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 22 根香蕉頭尾相接一樣長跟 26 顆西瓜一樣重跟 7 個幼兒園小朋友一樣重跟 4 個小學生一樣重能在 7.8 秒內游完一座大泳池（50 公尺）

Simosaurus 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)

Simosaurus 時速約 23 公里 (14 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

Simosaurus had large openings behind its eyes called upper temporal fossae, which were bigger than its eye sockets.1

Its jaw joint was set far back, projecting beyond the main part of the skull, giving it a unique bite.1

Simosaurus had a flattened trunk that prevented side-to-side swimming, unlike most other nothosaurs.1

It swam using powerful downstrokes of its forelimbs, but its upstroke was weak, making it a moderately strong swimmer.1

The first Simosaurus fossils were found in Lunéville, France, and described by German paleontologist Hermann von Meyer in 1842.1

Simosaurus is known from the Muschelkalk deposits in Germany, where it appears in layers marked by the ammonite Ceratites nodosus.1

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

?How big was Simosaurus?

Simosaurus grew from 3 to 4 metres (9.8 to 13.1 ft) in length.1

?What did Simosaurus eat?

It ate hard-shelled organisms like ammonites and holostean fish, using its blunt teeth to crush them.1

?How did Simosaurus swim?

It swam with powerful downstrokes of its forelimbs, but its upstroke was weak, making it a moderately strong swimmer.1

給恐龍專家

學名: Simosaurus
命名者: Meyer 18423
類群: 海生爬蟲類
科 / 演化支: Simosauridae3
分類: Nothosauria > Sauropterygia3
岩石的年代: 247 到 201 百萬年 ()3
岩層: Jilh, Erfurt, Gevanim3
國家: 德國, 法國, 沙烏地阿拉伯, 以色列, 義大利3
化石紀錄: The Paleobiology Database 收錄 15 筆3
發現: German paleontologist Christian Erich Hermann von Meyer named Simosaurus in 1842 based on a skull from Lunéville, France. That original skull has since been lost.1
仍有爭議: Scientists debate whether Simosaurus was a nothosaur, a pachypleurosaur, or a more primitive sauropterygian.1