恐龍卡第 1204 張，共 2 027 張

Monoenantiornis

名字的意思： “single opposite bird”1

吃：肉早期鳥類白堊紀早期

Monoenantiornis was a small, toothed bird that lived in what is now China during the Early Cretaceous. It had strong legs and sharp teeth, and it probably hunted insects and other small animals.2

生存年代

121 到 113 百萬年前4

白堊紀早期

化石發現地

Sihedang, Lingyuan, Liaoning Province, China2

長度

0.1 到 0.3 m (0.3 到 1 ft)2

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

牠有多大？

牠有多長？

跟 9 塊積木排成一排一樣長能在 14 秒內飛越一整座足球場

Monoenantiornis 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)

Monoenantiornis 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

Monoenantiornis had small teeth with pointed tips that were not curved backward, which is unusual for early birds.2

The only known fossil of Monoenantiornis is a nearly complete skeleton of a young bird that was still growing.3

Its foot had a very strong second toe and a delicate fourth toe, suggesting it used its feet for grabbing prey.2

Monoenantiornis lived about 121 to 113 million years ago in the Early Cretaceous period.2

It was an enantiornithine bird, a group that had teeth and claws on their wings, unlike modern birds.1

The fossil was found at the Sihedang locality, which is famous for preserving many other early bird fossils.3

Monoenantiornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Monoenantiornis 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: Monoenantiornis
命名者: Hu and O'Connor 20174
類群: 早期鳥類
科 / 演化支: Enantiornithes4
分類: Theropoda > Avialae4
岩石的年代: 121 到 113 百萬年 (Aptian)4
岩層: Jiufotang4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Monoenantiornis was named by scientists Han Hu and Jingmai O'Connor in 2017 based on a single fossil skeleton from the Jiufotang Formation in China.2
仍有爭議: Scientists are not sure exactly how large adult Monoenantiornis grew, because the only known fossil is from a young individual.3