恐龍卡第 1515 張，共 2 027 張

Qianxisaurus

名字的意思： “lizard from western Guizhou”1

吃：肉海生爬蟲類三疊紀中期嚴格來說不是恐龍

Qianxisaurus was a marine reptile that swam in the warm seas of China about 238 million years ago. It had a long body, a long tail, and a snout longer than the rest of its skull. This creature was not a dinosaur, but a type of eosauropterygian, a group of ancient sea reptiles.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

241 到 237 百萬年前2

三疊紀中期

化石發現地

Guizhou Province, southwestern China1

長度

最多 0.8 m (2.6 ft)1

最高速度

時速約 7 公里（4 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 1.5 隻家貓從鼻子接到尾巴一樣長跟 4 根香蕉頭尾相接一樣長能在 26 秒內游完一座大泳池（50 公尺）

Qianxisaurus 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)

Qianxisaurus 時速約 7 公里 (4 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

Qianxisaurus had 28 back vertebrae and four sacral vertebrae, which is unusual for early sauropterygians.1

Its skull was only 7.6 cm (3 inches) long, but the whole animal was over 80 cm (2 feet 7 inches) in length.1

The name Qianxisaurus comes from 'Qianxi', meaning western Guizhou in Chinese, and 'saurus' meaning lizard.1

Qianxisaurus had a very small supratemporal fenestra, a hole in the skull roof, which was only slightly larger than a foramen in the parietal bone.1

Its dorsal ribs had a longitudinal groove on the upper-back surface, a feature shared with some other early marine reptiles like Corosaurus and Sanchiaosaurus.1

The only known fossil of Qianxisaurus was discovered in 2006 near the Huangnihe River in Xingyi, Guizhou, and is now kept at the National Museum of Natural Science in Taiwan.1

Qianxisaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Qianxisaurus 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: Qianxisaurus
命名者: Cheng et al. 20122
類群: 海生爬蟲類
科 / 演化支: Eosauropterygia2
分類: Sauropterygia2
岩石的年代: 241 到 237 百萬年 (Ladinian)2
岩層: Falang2
國家: 中國2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: Qianxisaurus was named by Yen-Nien Cheng, Xiao-Chun Wu, Tamaki Sato and Hsi-Yin Shan in 2012 based on a nearly complete skeleton found in the Zhuganpo Member of the Falang Formation in Guizhou, China.1
仍有爭議: Scientists are not sure whether Qianxisaurus was a pachypleurosaur or a more basal eosauropterygian, and its exact relationships within the group are still debated.1