恐龍卡第 1971 張，共 2 027 張

Yimenosaurus

名字的意思： “Yimen reptile”1

吃：植物長脖子恐龍侏羅紀早期

Yimenosaurus was a big, long-necked plant-eater that lived in China during the Early Jurassic. It walked on four legs and could grow as long as a school bus!1 2

生存年代

201 到 200 百萬年前4

侏羅紀早期

化石發現地

Yimen County, Yunnan Province, China1 3

長度

6 到 9 m (20 到 30 ft)1 3

體重

2 公噸 (4,400 lb)1

高度

2.3 m (7.5 ft)

估計值

最高速度

時速約 24 公里（15 英里）

跑步, 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？

牠有多高？

估計值

牠有多重？

跟 1.5 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長跟 100 隻狗一樣重跟 400 顆西瓜一樣重跟 2.5 整班小學生一樣重跟 4 隻北極熊一樣重能在 15 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Yimenosaurus 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)

Yimenosaurus 時速約 24 公里 (15 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

Yimenosaurus is known from at least 10 partial skeletons and a skull, so scientists know quite a lot about it.2

Its name honors Yang Zhongjian, the father of Chinese paleontology, who was also called C.C. Young.1

Yimenosaurus had 4 teeth in its upper front jaw, 17 to 18 teeth in each upper cheek, and about 23 teeth in each lower jaw.3

The first fossils of Yimenosaurus were found in 1987 by a team that included a research assistant named Xingyong Zhang.3

Yimenosaurus lived about 195 to 190 million years ago, during the Early Jurassic period.2

Its skull was quite delicate and long, with large, elliptical nostrils and a triangular opening in front of the eye.3

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

?How big was Yimenosaurus?

About 9 metres (30 feet) long and weighed around 2 tonnes (2.2 short tons). That is as long as a school bus.1 2

?What did Yimenosaurus eat?

It was a plant-eater, or herbivore. It had many teeth with small bumps (denticles) to help chew tough plants.2 1

?When did Yimenosaurus live?

It lived during the Early Jurassic period, about 195 to 190 million years ago.2 1

給恐龍專家

學名: Yimenosaurus
命名者: Bai et al. 19904
類群: 長脖子恐龍
科 / 演化支: Prosauropoda4
分類: Sauropodomorpha4
岩石的年代: 201 到 200 百萬年 (Hettangian)4
岩層: Fengjiahe4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Yimenosaurus was named in 1990 by Ziqi Bai, Jie Yang and Guohui Wang based on two skeletons found in Yunnan, China. The species name youngi honors paleontologist C.C. Young.1 2