恐龍卡第 1994 張，共 2 027 張

Yuornis

名字的意思： “Henan bird, after the Chinese abbreviation for Henan province”1

吃：肉早期鳥類白堊紀晚期

Yuornis was a bird that lived alongside the last dinosaurs. It had a toothless beak, just like modern birds, which was very rare for its time.1

生存年代

72 到 66 百萬年前3

白堊紀晚期

化石發現地

Qiupa Formation, Luanchuan Basin, Henan, China3 1

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)

Yuornis 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

Yuornis is one of the most complete Late Cretaceous enantiornithine birds ever found, with a three-dimensionally preserved skull.1

Unlike most enantiornithines, Yuornis had no teeth. Its skull looked a lot like modern birds because it lost several bones, like the lacrimal and postorbital.1

The name Yuornis comes from 'Yu', the one-character abbreviation for Henan province in China, where it was discovered.1

Yuornis lived about 72 to 66 million years ago, during the very end of the Age of Dinosaurs.3

Its closest relative might be Gobipteryx, another toothless bird from the Late Cretaceous, but scientists are not sure because tooth loss evolved many times.1

Yuornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Yuornis 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: Yuornis
命名者: Xu et al. 20213
類群: 早期鳥類
科 / 演化支: Enantiornithes3
分類: Theropoda > Avialae3
岩石的年代: 72 到 66 百萬年 (Maastrichtian)3
岩層: Qiupa3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Yuornis was named in 2021 by Xu Li and colleagues. The species name junchangi honors paleontologist Lü Junchang. The fossil was found in the Qiupa Formation of Henan, China.1 2
仍有爭議: Scientists are not sure whether Yuornis belongs to the family Gobipterygidae, because the features linking it to that group are all related to tooth loss, which evolved many times separately.1