恐龍卡第 0457 張，共 2 027 張

Cruralispennia

名字的意思： “leg feather”1

吃：肉早期鳥類白堊紀早期

Cruralispennia was a tiny, feathered bird that lived about 131 million years ago in what is now China. It had strange, wiry feathers on its legs that no other bird had before or since!1

生存年代

133 到 126 百萬年前4

白堊紀早期

化石發現地

Sichakou Basin, Fengning County, Hebei Province, northeastern China1

最高速度

時速約 27 公里（17 英里）

飛行, 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)

Cruralispennia 時速約 27 公里 (17 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

Cruralispennia had a plough-shaped pygostyle, a fused tail bone that was thought to only exist in more advanced birds. This shows that different bird groups evolved similar features separately.1

Its leg feathers were unlike any seen before: the base was like a stiff wire, and the tip was fluffy and split into many tiny strands.1

Even though Cruralispennia lived very early in bird history, its shoulder bone (coracoid) was already very slender, a shape usually found in later Cretaceous birds.1

The name Cruralispennia means 'leg feather' in Latin, because of the unusual feathers on its shin bone (tibiotarsus).1

This bird had 14 teeth in its lower jaw, which is why its full species name is multidonta, meaning 'many teeth'.1

Cruralispennia lived alongside other early birds like Protopteryx and Eoconfuciusornis in the same ancient lake environment.1

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

?How big was Cruralispennia?

Cruralispennia was a tiny bird, about the size of a modern sparrow. Its leg feathers were only 12 to 16 mm long.2 3

?Where did Cruralispennia live?

It lived in what is now China, around a lake in the Sichakou Basin about 131 million years ago.2

?What did Cruralispennia eat?

Scientists think Cruralispennia likely ate insects or small prey, because it had sharp, curved claws and many teeth in its lower jaw.2 3

給恐龍專家

學名: Cruralispennia
命名者: Wang et al. 20174
類群: 早期鳥類
科 / 演化支: Enantiornithes4
分類: Theropoda > Avialae4
岩石的年代: 133 到 126 百萬年 (Hauterivian)4
岩層: Huajiying4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Cruralispennia was named in 2017 by Min Wang and colleagues from a nearly complete skeleton found in the Huajiying Formation of China.4 1
仍有爭議: Scientists are not sure what the strange leg feathers were used for. They might have helped with display, insulation, or even sensing the environment.1