恐龍卡第 0540 張，共 2 027 張

Dreadnoughtus

名字的意思： “fears nothing”1

吃：植物長脖子恐龍白堊紀晚期

Dreadnoughtus was a giant, long-necked plant eater that stomped through ancient Argentina. It was one of the biggest land animals ever found, and its name means 'fears nothing' because it was so huge and tough.1

生存年代

84 到 72 百萬年前6

白堊紀晚期

化石發現地

Santa Cruz Province, Patagonia, Argentina1

長度

26 m (85 ft)1

體重

48 公噸到 49 公噸 (105,800 到 108,000 lb)1

高度

6 m (20 ft)1

最高速度

時速約 9 公里（6 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 8 頭大象一樣重

跟 6 台汽車排成一排一樣長跟 140 根香蕉頭尾相接一樣長跟 9800 顆西瓜一樣重跟 61 整班小學生一樣重跟 110 隻北極熊一樣重高到能從 3 樓的窗戶往裡看能在 40 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Dreadnoughtus 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)

Dreadnoughtus 時速約 9 公里 (6 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 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

Dreadnoughtus is known from more complete skeletons than any other gigantic titanosaur, with about 70% of the bones behind the skull preserved.1 3

Its neck was super long, about 11.3 metres (37 feet), which is almost half of its total body length.1

The type specimen was still growing when it died, so adults might have been even bigger.1

Its bones were buried quickly in a flood, which is why they are so well preserved.1

Small theropod teeth found with the bones suggest scavengers, maybe megaraptorans, nibbled on the carcass.1

Dreadnoughtus lived about 76 to 70 million years ago, during the Late Cretaceous.1

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

?How big was Dreadnoughtus?

About 26 metres long and weighed around 48 to 49 metric tons, though some estimates range higher or lower.1 4

?What did Dreadnoughtus eat?

It was a plant-eater (herbivore). Its long neck helped it reach lots of different plants without moving much.5 1

?Was Dreadnoughtus bigger than T. rex?

Yes, Dreadnoughtus was much bigger. It was about 26 metres long and weighed up to 49 metric tons, while T. rex was about 12 metres long and weighed around 8 metric tons.1 5

?Did Dreadnoughtus have any predators?

Healthy adults were probably too big to be attacked, but small theropod teeth found with the bones suggest scavengers like megaraptorans nibbled on the carcass.1 5

?How fast could Dreadnoughtus run?

Nobody knows for sure, but because it was so huge and walked on four legs, it probably moved slowly, like a modern elephant.5

?Where was Dreadnoughtus found?

In Patagonia, Argentina, in the Cerro Fortaleza Formation of Santa Cruz Province.1 4

?When did Dreadnoughtus live?

It lived during the Late Cretaceous, about 76 to 70 million years ago.1 5

?Why is it called Dreadnoughtus?

Its name means 'fears nothing' because its huge size made it hard for predators to attack. It also honors the dreadnought battleships.1 5

迷思破解王

迷思： Some people think Dreadnoughtus was the biggest dinosaur ever.

真相： It was one of the largest known from fairly complete remains, but other titanosaurs like Argentinosaurus might have been heavier, though they are known from much less complete fossils.1

給恐龍專家

學名: Dreadnoughtus
命名者: Lacovara et al. 20146
類群: 長脖子恐龍
科 / 演化支: Eutitanosauria6
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria6
岩石的年代: 84 到 72 百萬年 (Campanian)6
岩層: Cerro Fortaleza6
國家: 阿根廷6
化石紀錄: The Paleobiology Database 收錄 2 筆6
發現: Paleontologist Kenneth Lacovara discovered Dreadnoughtus in 2005 in the Cerro Fortaleza Formation in Argentina. It took four summers to dig out the huge bones, using mules and ropes to move them.1
仍有爭議: Scientists still debate exactly where Dreadnoughtus fits in the titanosaur family tree, because it has a mix of advanced and primitive features.1