恐龍卡第 0859 張，共 2 027 張

Igai

名字的意思： “Igai is named after the 'lord of the oasis' deity from ancient Egyptian mythology, and 'semkhu' means 'the forgotten'.”1

吃：植物長脖子恐龍白堊紀晚期

Igai was a giant, long-necked plant-eater that stomped through what is now Egypt about 74 million years ago. It was a titanosaur, a group of sauropods known for their huge bodies and small heads. Even though it was big, it was actually one of the smaller titanosaurs!1 2

生存年代

84 到 72 百萬年前4

白堊紀晚期

化石發現地

Fossils were found in the Kharga Oasis, Western Desert of Egypt, in the Quseir Formation.1 2

長度

10 到 15 m (33 到 49 ft)2

高度

3.5 m (11 ft)

估計值

最高速度

時速約 16 公里（10 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？

估計值

跟 3 台汽車排成一排一樣長跟 83 根香蕉頭尾相接一樣長能在 22 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Igai 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)

Igai 時速約 16 公里 (10 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

Igai had air sacs inside its backbone bones, making them light and spongy, which helped it grow so large.2

Its fifth metacarpal (a bone in the hand) had two unique bumps on the inner side that no other titanosaur has.2

Igai was more slender than many other titanosaurs, with leg bones that were relatively thin and graceful.2

The first and second metatarsals (foot bones) had deep grooves on their upper surfaces, a feature not seen in other titanosaurs.2

Igai lived about 74 million years ago, during the Campanian stage of the Late Cretaceous.2

Igai was probably bigger than its close relative Mansourasaurus, which was about 8 to 10 metres long.2

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

?How big was Igai?

Igai was about 10 to 15 metres long, which is bigger than its relative Mansourasaurus at 8 to 10 metres.2 1

?What did Igai eat?

Igai was a plant-eater, like all sauropods. It used its long neck to reach leaves and plants.2

?When did Igai live?

Igai lived about 74 million years ago, during the Late Cretaceous period.2 1

?Where was Igai found?

Igai was found in the Kharga Oasis in Egypt, in rocks called the Quseir Formation.2 1

迷思破解王

迷思： Igai was a giant, slow-moving beast like other sauropods.

真相： Igai was actually relatively small and slender for a titanosaur, and its limb bones suggest it was quite agile for its size.2

給恐龍專家

學名: Igai
命名者: Gorscak et al. 20234
類群: 長脖子恐龍
科 / 演化支: Saltasauridae4
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria4
岩石的年代: 84 到 72 百萬年 (Campanian)4
岩層: Quseir4
國家: 埃及4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Fossils of Igai were first found in 1977 by German scientists in the Kharga Oasis, Egypt. It was named and described in 2023 by Gorscak and colleagues.2 3
仍有爭議: Scientists are still debating whether Igai was fully grown when it died, because some bones suggest it might not have been completely mature.1