恐龍卡第 0016 張，共 2 027 張

Achillesaurus

名字的意思： “Achilles lizard”1

吃：肉奇特的羽毛恐龍白堊紀晚期

Achillesaurus was a small, feathered dinosaur that lived in South America. It was an alvarezsaur, a type of theropod with tiny arms and a bird-like skull. This dinosaur probably ate insects and other small animals.1 2

生存年代

86 到 84 百萬年前5

白堊紀晚期

化石發現地

Río Negro Province, Argentina5 2

長度

1.5 到 2.5 m (4.9 到 8.2 ft)1

體重

10 kg 到 20 kg (22 到 44 lb)1

高度

1 m (3.3 ft)

估計值

最高速度

時速約 44 公里（27 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

牠有多重？

跟 5 隻家貓一樣重

跟 2.5 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長跟 4 顆西瓜一樣重能在 8.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Achillesaurus 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)

Achillesaurus 時速約 44 公里 (27 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

Achillesaurus is named after the Greek hero Achilles, because its ankle bones were fused together like Achilles' famous tendon.2

It lived about 85 to 83 million years ago during the Santonian stage of the Late Cretaceous.1

Achillesaurus was a relatively large alvarezsaurid, bigger than its close relative Alvarezsaurus.2

Its fossils were found in the Bajo de la Carpa Formation in Argentina, which was a dry, sandy environment.5 2

Unlike some Asian alvarezsaurids, Achillesaurus did not have a highly reduced fibula or a special foot structure called arctometatarsalian.2

Scientists are not sure exactly where Achillesaurus fits in the alvarezsaur family tree, because it shares features with both South American and Asian species.2

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

?What did Achillesaurus eat?

Achillesaurus was an insectivore, meaning it ate insects and other small animals. Its bird-like skull and tiny arms helped it catch and eat bugs.3

?How big was Achillesaurus?

Scientists do not know its exact size because only a partial skeleton has been found. It was a relatively large alvarezsaurid, bigger than its close relative Alvarezsaurus.4 2

?Is Achillesaurus a dinosaur?

Yes, Achillesaurus is a dinosaur. It is a theropod dinosaur from the alvarezsaurid family.4 3

?Did Achillesaurus have feathers?

Yes, Achillesaurus was a feathered dinosaur. It belonged to a group of theropods that are known to have had feathers.4 3

給恐龍專家

學名: Achillesaurus
命名者: Martinelli and Vera 20075
類群: 奇特的羽毛恐龍
科 / 演化支: Alvarezsauridae5
分類: Theropoda > Alvarezsauridae5
岩石的年代: 86 到 84 百萬年 (Santonian)5
岩層: Bajo de la Carpa5
國家: 阿根廷5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Achillesaurus was named by paleontologists Agustín Martinelli and Ezequiel Vera in 2007, based on a partial skeleton found in Argentina.5 2
仍有爭議: Scientists still debate whether Achillesaurus is more closely related to other South American alvarezsaurids or to the Asian group Mononykinae.2