恐龍卡第 1939 張，共 2 027 張

Xiaotingia

名字的意思： “named in honour of Zheng Xiaoting, who helped build the Shandong Tianyu Museum of Nature”1

吃：肉迅猛龍類侏羅紀中期到侏羅紀晚期

Xiaotingia was a small, feathered dinosaur that lived about 160 million years ago. It looked a lot like Archaeopteryx, the famous 'first bird', and scientists are still arguing about whether it was a bird or a raptor.2 3

生存年代

168 到 152 百萬年前5

侏羅紀中期到侏羅紀晚期

化石發現地

Linglongta, Jianchang, western Liaoning, China1

長度

0.6 m (2 ft)4

體重

0.82 kg (2 lb)1 4

高度

0.25 m (0.8 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 7 根香蕉一樣重

跟 3 根香蕉頭尾相接一樣長比一隻家貓還輕跟 7 根香蕉一樣重小到能從椅子底下走過去能在 19 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Xiaotingia 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)

Xiaotingia 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

Xiaotingia had long, strong arms and hands, which scientists used to think were special bird features, but they are actually found in a bigger group called Paraves.2

When Xiaotingia was added to the family tree, it made Archaeopteryx move from being a bird to being a raptor, which surprised many scientists.2

Xiaotingia had a large hole in its lower jaw, called a surangular foramen, that was more than 6% of the total jaw length.1

Its fourth finger bone (metacarpal IV) was thicker than the second and third, which is unusual.1

Xiaotingia shared some features with troodontids, like closely packed teeth in the front of the jaw and long, slender tail bones.1

The only known fossil was bought from a fossil dealer, so scientists are not 100% sure exactly which rock layer it came from.1

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

迷思破解王

迷思： Xiaotingia is a bird because it looks like Archaeopteryx.

真相： Scientists disagree. Some think Xiaotingia is a raptor (a deinonychosaur), not a bird, because it shares many features with raptors.2

給恐龍專家

學名: Xiaotingia
命名者: Xu et al. 20115
類群: 迅猛龍類
科 / 演化支: Troodontidae5
分類: Theropoda > Troodontidae5
岩石的年代: 168 到 152 百萬年 (Bathonian / Kimmeridgian)5
岩層: Tiaojishan5
國家: 中國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Xiaotingia was named in 2011 by Xu Xing and colleagues. The only skeleton was bought by the Shandong Tianyu Museum of Nature from a fossil dealer who said it came from Liaoning, China.1
仍有爭議: Scientists still debate whether Xiaotingia was a bird or a raptor, and even the exact age of the fossil is uncertain because the dealer could not say which quarry it came from.2 1