恐龍卡第 0206 張，共 2 027 張

Austrocheirus

名字的意思： “southern hand”1

吃：肉肉食恐龍白堊紀晚期

Austrocheirus was a meat-eating dinosaur that lived in what is now Argentina during the Late Cretaceous. It was about as long as a school bus and had hands that were not tiny like those of its relatives. Scientists are still debating exactly what kind of theropod it was.1 2

生存年代

84 到 72 百萬年前4

白堊紀晚期

化石發現地

Santa Cruz Province, Argentina (Pari Aike Formation, also called Cerro Fortaleza Formation)1 3

長度

5.5 到 6.5 m (18 到 21 ft)1

高度

2 m (6.6 ft)

估計值

最高速度

時速約 40 公里（25 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 6 隻狗從鼻子接到尾巴一樣長跟 36 根香蕉頭尾相接一樣長能在 9 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Austrocheirus 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)

Austrocheirus 時速約 40 公里 (25 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

Austrocheirus is known only from a partial hand, a shin bone, foot bones, and some backbone pieces.1

Its name means 'southern hand' because its fossils were found in the southern part of South America.1

Unlike many other abelisauroids, Austrocheirus did not have tiny, shrunken forelimbs. Its hands were still full-sized.2

Some scientists think Austrocheirus might not be an abelisauroid at all. They say it could be a more general theropod whose exact family is unknown.1

The only known fossil of Austrocheirus was found on March 17, 2002, at a place called Hoyada Arroyo Seco in Argentina.2

A 2024 study suggested Austrocheirus might belong to a group called Berthasauridae, which are close relatives of abelisauroids.1

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

?How big was Austrocheirus?

Austrocheirus was a medium sized theropod, measuring about 5.5 to 6.5 metres (18 to 21 feet) long. That is roughly as long as a school bus.1

?Why is Austrocheirus called 'southern hand'?

Its name means 'southern hand' because its fossils were found in southern South America and only a partial hand was known at first.1

?Did Austrocheirus have small arms?

No. Unlike many of its abelisauroid relatives, Austrocheirus did not have tiny, shrunken forelimbs. Its hands were still full-sized.1 2

給恐龍專家

學名: Austrocheirus
命名者: Ezcurra et al. 20104
類群: 肉食恐龍
科 / 演化支: Noasauridae4
分類: Theropoda > Ceratosauria4
岩石的年代: 84 到 72 百萬年 (Campanian)4
岩層: Cerro Fortaleza4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Austrocheirus was named and described in 2010 by paleontologists Martin Ezcurra, Federico Agnolin, and Fernando Novas. The species name isasii honors Marcelo Pablo Isasi, who found and prepared the fossil.1 2
仍有爭議: Scientists are not sure which group of theropods Austrocheirus belongs to. Some say it is an abelisauroid, others think it is a more primitive theropod, and a 2024 study placed it in a new group called Berthasauridae.1