恐龍卡第 0849 張，共 2 027 張

Iaceornis

名字的意思： “Marsh's neglected bird”1

吃：肉早期鳥類白堊紀晚期

Iaceornis was a seabird that lived alongside dinosaurs like T. rex. It had strong wings and probably flew over the ancient sea that covered what is now Kansas.1

生存年代

86 到 84 百萬年前2

白堊紀晚期

化石發現地

Gove County, Kansas, USA1

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)

Iaceornis 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

Iaceornis lived about 83.5 million years ago during the Late Cretaceous period.1

Only one fossil of Iaceornis has ever been found, and it is a partial skeleton without a skull.1

For over 120 years, scientists thought this fossil belonged to another bird called Apatornis. In 2004, paleontologist Julia Clarke proved it was a different species.1

The name Iaceornis means 'neglected bird' because the fossil was ignored for so long.1

Iaceornis is more advanced than the toothed bird Ichthyornis but less advanced than modern birds.1

The fossil was first dug up by famous fossil hunter Othniel Charles Marsh in 1877.1

Iaceornis 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Iaceornis 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: Iaceornis
命名者: Clarke 20042
類群: 早期鳥類
科 / 演化支: Ornithurae2
分類: Theropoda > Avialae2
岩石的年代: 86 到 84 百萬年 (Santonian)2
岩層: Niobrara2
國家: 美國2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: The fossil was collected by Othniel Charles Marsh in 1877 in Kansas. It was first thought to be Apatornis celer, but in 2004 Julia Clarke renamed it Iaceornis marshi after studying its wing bones.1
仍有爭議: Scientists are not sure exactly what Iaceornis looked like because the only fossil is missing its skull.1