恐龍卡第 0599 張，共 2 027 張

Eomamenchisaurus

名字的意思： “dawn Mamenchisaurus”1

吃：植物長脖子恐龍侏羅紀中期

Eomamenchisaurus was an early long-necked dinosaur that lived in what is now China. It was a sauropod, a giant plant-eater that walked on four legs and had a very long neck.1

生存年代

175 到 162 百萬年前5

侏羅紀中期

化石發現地

Yuanmou, Yunnan Province, China1 3

長度

最多 15.5 m (51 ft)4

體重

最多 4.5 公噸 (9,900 lb)4

高度

3.6 m (12 ft)

估計值

最高速度

時速約 19 公里（12 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 3 台汽車一樣重

跟 3 台汽車排成一排一樣長跟 86 根香蕉頭尾相接一樣長大約跟一頭大象一樣重跟 900 顆西瓜一樣重跟 6 整班小學生一樣重跟 10 隻北極熊一樣重能在 19 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Eomamenchisaurus 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)

Eomamenchisaurus 時速約 19 公里 (12 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

Eomamenchisaurus means 'dawn Mamenchisaurus' because it is an early relative of the better-known Mamenchisaurus.1

Its thigh bone (femur) is 1.1 metres (3.6 feet) long, similar to the femur of Mamenchisaurus youngi, which was about 16 metres (52 feet) long.1

The tibia (shin bone) is only about 64% as long as the femur, a primitive feature compared to later sauropods.1

Some of its back vertebrae are fused together, a trait shared with other mamenchisaurid dinosaurs.1

The fourth trochanter (a ridge for muscle attachment on the femur) is on the inner side of the bone, like in early sauropods, not in the middle like in Mamenchisaurus.1

Eomamenchisaurus lived during the Middle Jurassic, about 174 to 161 million years ago.2

Eomamenchisaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Eomamenchisaurus 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。

給恐龍專家

學名: Eomamenchisaurus
命名者: Lü et al. 20085
類群: 長脖子恐龍
科 / 演化支: Mamenchisauridae5
分類: Sauropodomorpha > Sauropoda5
岩石的年代: 175 到 162 百萬年 (Aalenian / Callovian)5
岩層: Zhanghe5
國家: 中國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Eomamenchisaurus was named in 2008 by Lü Junchang and colleagues based on a partial skeleton found in Jiangyi Township, Yuanmou County, Yunnan, China.1
仍有爭議: Scientists are not sure if Eomamenchisaurus is actually different from another mamenchisaurid called Yuanmousaurus, which was found in the same rock formation.1