恐龍卡第 1948 張，共 2 027 張

Xixianykus

名字的意思： “Xixia claw”1

吃：肉奇特的羽毛恐龍白堊紀晚期

Xixianykus was a tiny, speedy dinosaur that lived in what is now China. It had long legs for running fast and was covered in feathers. Scientists think it was one of the fastest runners among non-bird dinosaurs.1

生存年代

90 到 84 百萬年前5

白堊紀晚期

化石發現地

Henan Province, China1 2

長度

0.5 到 1 m (1.6 到 3.3 ft)2

體重

0.74 kg (2 lb)3

高度

0.2 m (0.7 ft)3

最高速度

時速約 21 公里（13 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？

牠有多重？

跟 6 根香蕉一樣重

跟 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長比一隻家貓還輕跟 6 根香蕉一樣重小到能從椅子底下走過去能在 17 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Xixianykus 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)

Xixianykus 時速約 21 公里 (13 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

Xixianykus belonged to a group called alvarezsaurids, which were small dinosaurs with strong arms and long legs.1

Its fossils were found in the Majiacun Formation in Xixia County, Henan Province, China.1

Xixianykus lived about 89 to 83 million years ago, during the Late Cretaceous period.2

This dinosaur had special bones in its hips and legs that helped it run very fast.1

Xixianykus is one of the earliest known members of the Parvicursorinae group, which were extreme runners.1

The name Xixianykus means 'Xixia claw', because its fossils were found in Xixia County and it had sharp claws.1

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

?How big was Xixianykus?

Xixianykus was very small, only about 50 centimetres long and 20 centimetres tall. It weighed around 0.74 kilograms, making it one of the smallest known non-bird dinosaurs.3 4

?How fast could Xixianykus run?

Scientists think Xixianykus was extremely fast because it had very long legs compared to its body, with special foot bones that helped it run. It was built like a tiny roadrunner and could sprint quickly to escape predators.3 4

?Did Xixianykus eat meat?

Xixianykus likely ate colonial insects, such as termites. It had a long, tubular snout and strong arms with a large claw to tear open logs and nests.3 4

給恐龍專家

學名: Xixianykus
命名者: Xu et al. 20105
類群: 奇特的羽毛恐龍
科 / 演化支: Alvarezsauridae5
分類: Theropoda > Alvarezsauridae5
岩石的年代: 90 到 84 百萬年 (Coniacian / Santonian)5
岩層: Majiacun5
國家: 中國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Xixianykus was named in 2010 by Xu and colleagues based on a partial skeleton found in the Majiacun Formation of Henan Province, China.1 2
仍有爭議: Scientists are not sure exactly what Xixianykus ate, but its sharp claws and small size suggest it hunted small prey.2