恐龍卡第 0083 張，共 2 027 張

Alxasaurus

名字的意思： “Alxa lizard”1

吃：植物奇特的羽毛恐龍白堊紀早期

Alxasaurus was an early therizinosaur, a weird dinosaur with a long neck, a big belly, and huge claws on its hands. It walked on two legs and ate plants, using its beak to snip leaves and its big gut to digest them.1

生存年代

121 到 113 百萬年前2

白堊紀早期

化石發現地

Inner Mongolia, China1 2

長度

3.8 到 4 m (12 到 13 ft)1

體重

380 kg 到 400 kg (838 到 882 lb)1

高度

1.5 m (4.9 ft)1

最高速度

時速約 26 公里（16 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？

牠有多重？

跟 20 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 22 根香蕉頭尾相接一樣長跟 80 顆西瓜一樣重跟 21 個幼兒園小朋友一樣重跟 12 個小學生一樣重能在 14 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Alxasaurus 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)

Alxasaurus 時速約 26 公里 (16 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

Alxasaurus is one of the earliest known therizinosauroids, but it already had the long neck, short tail, and big claws of later relatives.1

Its hand claws were long, curved, and sharp, but it used them for gathering plants, not for hunting.1

Alxasaurus had a semilunate carpal bone in its wrist, a feature shared with birds and other maniraptoran theropods.1

Five specimens of Alxasaurus were found together in 1988 during the China-Canada Dinosaur Project.1

Its fossils come from the Bayin-Gobi Formation, which is about 113 to 100 million years old (Early Cretaceous).1 2

The discovery of Alxasaurus helped prove that therizinosaurs were actually weird theropod dinosaurs, not late-surviving sauropodomorphs.1

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

?How big was Alxasaurus?

About 3.8 to 4 metres (12 to 13 feet) long and weighed around 380 to 400 kilograms (840 to 880 pounds). It stood about 1.5 metres (4.9 feet) tall at the hip.1

?What did Alxasaurus eat?

Alxasaurus was a plant-eater. It used its beak to snip leaves and had a big gut to digest them.1

?Did Alxasaurus have feathers?

No direct feather fossils have been found for Alxasaurus, but its close relative Beipiaosaurus had feathers, so it probably did too.1

?When did Alxasaurus live?

Alxasaurus lived during the Early Cretaceous period, about 113 to 100 million years ago.1

?Where was Alxasaurus found?

Its fossils were found in the Bayin-Gobi Formation of Inner Mongolia, China.1

?Is Alxasaurus a dinosaur?

Yes, Alxasaurus is a theropod dinosaur. It belongs to a weird group called therizinosaurs.1

迷思破解王

迷思： Alxasaurus was a slow, clumsy dinosaur.

真相： Alxasaurus was a bipedal theropod that walked on two legs and was likely agile, with a long neck and tail for balance.1

給恐龍專家

學名: Alxasaurus
命名者: Russell and Dong 19942
類群: 奇特的羽毛恐龍
科 / 演化支: Therizinosauroidea2
分類: Theropoda > Therizinosauria2
岩石的年代: 121 到 113 百萬年 (Aptian)2
岩層: Bayangobi2
國家: 中國2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: Alxasaurus was named by Dale Russell and Dong Zhiming in 1993 based on five specimens found in 1988 in the Bayin-Gobi Formation of Inner Mongolia, China.1
仍有爭議: Scientists are not sure exactly how Alxasaurus is related to other therizinosaurs, because its skeleton shows a mix of primitive and advanced features.1