恐龍卡第 0116 張，共 2 027 張

Animantarx

名字的意思： “living citadel”1

吃：植物甲龍類白堊紀早期

Animantarx was a slow-moving, plant-eating dinosaur covered in heavy armor like a tank. It had no club on its tail, unlike some of its relatives. This dinosaur was discovered using a Geiger counter because its bones were slightly radioactive!1 2

生存年代

121 到 100 百萬年前4

白堊紀早期

化石發現地

Mussentuchit Member of the Cedar Mountain Formation, Utah, USA1

長度

最多 3 m (9.8 ft)1

體重

最多 454 kg (1,000 lb)2

高度

最多 1.07 m (3.5 ft)2

最高速度

時速約 21 公里（13 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 23 隻狗一樣重

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 91 顆西瓜一樣重跟 24 個幼兒園小朋友一樣重跟 14 個小學生一樣重能在 17 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Animantarx 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)

Animantarx 時速約 21 公里 (13 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

Animantarx was the first dinosaur discovered using only technology,a Geiger counter detected its radioactive bones underground.2

Its name means 'living citadel' because its heavy armor made it almost impossible for predators to attack.1

Only one specimen of Animantarx has ever been found, including the lower jaw, back of the skull, neck and back vertebrae, and parts of the legs.1

Animantarx lived about 106 to 97 million years ago during the Early and Late Cretaceous periods.1

Its skull was highly domed on top, and it had small horns on the bones behind its eyes and on its cheekbones.1

The lower jaw of Animantarx was only armored on half its length, which is a unique feature among its relatives.1

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

?How big was Animantarx?

About 3 metres long. Its skull was about 25 centimetres long.1

?What did Animantarx eat?

It was a plant-eater. It ate low-growing plants like ferns and shrubs.3

?Did Animantarx have a tail club?

No, it did not have a tail club. Unlike some of its relatives, it only had heavy armor on its body.1

?How was Animantarx discovered?

It was found using a Geiger counter that detected the radioactivity of its bones. No bones were showing on the surface.1

?Where did Animantarx live?

It lived in what is now Utah, USA, about 106 to 97 million years ago. The area was a floodplain with rivers and swamps.1

?Is Animantarx a dinosaur?

Yes, it is a dinosaur. It is a type of nodosaurid ankylosaur, which is an armored, plant-eating dinosaur.1

給恐龍專家

學名: Animantarx
命名者: Carpenter et al. 19994
類群: 甲龍類
科 / 演化支: Nodosauridae4
分類: Ornithischia > Ankylosauria > Nodosauridae > Thyreophora4
岩石的年代: 121 到 100 百萬年 (Aptian / Albian)4
岩層: Cedar Mountain4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Animantarx was discovered by Ramal Jones, a retired radiologist, in 1999. He used a Geiger counter to find the radioactive bones in the Cedar Mountain Formation of Utah. The species was named after him by Carpenter and colleagues.1 2
仍有爭議: Scientists are not sure exactly how Animantarx is related to other nodosaurid dinosaurs. Some studies suggest it is closely related to Edmontonia, but its exact place in the family tree is still debated.1