恐龍卡第 0147 張，共 2 027 張

Aratasaurus

名字的意思： “born fire lizard”1

吃：肉肉食恐龍白堊紀早期

Aratasaurus was a meat-eating dinosaur that lived in what is now Brazil. It was a young animal when it died, and scientists think it would have grown bigger. Its leg bones were found in a dark shale rock.1 2

生存年代

113 到 110 百萬年前3

白堊紀早期

化石發現地

Mina Pedra Branca, near Santana do Cariri, Ceará, Brazil1 2

長度

3.12 m (10 ft)1

體重

34.25 kg (76 lb)1 2

最高速度

時速約 47 公里（29 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？

牠有多重？

跟 9 隻家貓一樣重

跟 3 隻狗從鼻子接到尾巴一樣長跟 17 根香蕉頭尾相接一樣長跟 7 顆西瓜一樣重能在 7.7 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Aratasaurus 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)

Aratasaurus 時速約 47 公里 (29 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

Aratasaurus is known from only one partial right leg, including part of the thigh bone, shin bone, and foot bones.1

It lived about 115 million years ago during the Early Cretaceous period.2

The fossil was discovered in 2008 in a plaster mine.2

Aratasaurus is the only tetrapod (four-limbed animal) found so far in the lower layers of the Romualdo Formation.1 2

Its name comes from the Tupi language words for 'born' and 'fire', because the fossil was studied at the Museu Nacional in Rio de Janeiro, which was damaged by a fire in 2018.1

Scientists think Aratasaurus was a basal coelurosaur, meaning it was an early relative of more advanced theropods like Tyrannosaurus.1

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

?How big was Aratasaurus?

It was about 3.12 metres (10.2 ft) long and weighed around 34.25 kilograms (75.5 lb). But it was still growing when it died, so adults could have been larger.2 1

?Did Aratasaurus have feathers?

Yes, scientists think it likely had some form of feather covering because it was a coelurosaur, a group that includes feathered dinosaurs. No feathers were preserved in the fossil, though.2

?What did Aratasaurus eat?

Aratasaurus was a meat-eating dinosaur, or theropod. It likely hunted small animals, but its exact diet is not known from the few bones found.2

?Where was Aratasaurus found?

Its leg bones were discovered in 2008 in a plaster mine in northeastern Brazil, in the Romualdo Formation near Santana do Cariri.2 1

給恐龍專家

學名: Aratasaurus
命名者: Sayão et al. 20203
類群: 肉食恐龍
科 / 演化支: Coelurosauria3
分類: Theropoda3
岩石的年代: 113 到 110 百萬年 (Albian)3
岩層: Romualdo3
國家: 巴西3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Aratasaurus was named in 2020 by a team of Brazilian and Chinese scientists. The fossil was donated by a local resident who found it in the Mina Pedra Branca mine near Santana do Cariri, Brazil.1
仍有爭議: Scientists are not sure exactly how big Aratasaurus would have grown as an adult, because only a juvenile specimen has been found.1