恐龍卡第 1122 張，共 2 027 張

Majiashanosaurus

名字的意思： “Majiashan lizard”1

吃：肉海生爬蟲類三疊紀早期到三疊紀中期嚴格來說不是恐龍

Majiashanosaurus was a small, early marine reptile that swam in the warm seas of what is now China about 248 million years ago. It had a flat, round shoulder bone that looked like a dinner plate, which made it different from its relatives. This reptile lived alongside the early fish-lizard Chaohusaurus.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

251 到 247 百萬年前2

三疊紀早期到三疊紀中期

化石發現地

Majiashan, Chaohu, Anhui Province, China1

長度

0.474 m (1.6 ft)1

最高速度

時速約 4 公里（2 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 2.5 根香蕉頭尾相接一樣長跟 15 塊積木排成一排一樣長能在 45 秒內游完一座大泳池（50 公尺）

Majiashanosaurus 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？

Majiashanosaurus 時速約 4 公里 (2 mph)

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)

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

Majiashanosaurus is known from just one fossil: a nearly complete skeleton missing only the skull and a few tail bones.1

Its name comes from the place where it was found, Majiashan, plus the Greek word 'sauros' meaning lizard.1

The species name 'discocoracoidis' means 'disk-shaped coracoid' because its shoulder bone was round and flat like a coin.1

It lived during the Early Triassic period, just a few million years after the biggest mass extinction in Earth's history.1

The fossil was found lying on its back, so scientists see the underside of the skeleton.1

Majiashanosaurus had a curved upper arm bone and double-headed ribs in its neck, features that help identify it as a sauropterygian.1

Majiashanosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Majiashanosaurus 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: Majiashanosaurus
命名者: Jiang et al. 20142
類群: 海生爬蟲類
科 / 演化支: Eosauropterygia2
分類: Sauropterygia2
岩石的年代: 251 到 247 百萬年 ()2
岩層: Nanlinghu2
國家: 中國2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: Majiashanosaurus was named in 2014 by a team of scientists led by Da-Yong Jiang. The single fossil was dug up at Majiashan in Anhui Province, China.1
仍有爭議: Scientists are not sure whether Majiashanosaurus was a true pachypleurosaur or a more primitive eosauropterygian.1