恐龍卡第 0051 張，共 2 027 張

Akainacephalus

名字的意思： “thorny head”1

吃：植物甲龍類白堊紀晚期

Akainacephalus was an armored dinosaur that looked like a living tank. It had a bony club at the end of its tail and a head covered in spiky, pyramid-shaped bumps. This dinosaur lived in what is now southern Utah, USA, about 76 million years ago.1 3

生存年代

84 到 72 百萬年前3

白堊紀晚期

化石發現地

Kaiparowits Formation, southern Utah, USA3 1

長度

4.5 到 5.5 m (15 到 18 ft)1

體重

1 公噸到 1.5 公噸 (2,200 到 3,300 lb)1

高度

1.5 到 2 m (4.9 到 6.6 ft)1

最高速度

時速約 17 公里（11 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 1 台汽車一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 31 根香蕉頭尾相接一樣長跟 75 隻狗一樣重跟 300 顆西瓜一樣重跟 79 個幼兒園小朋友一樣重跟 47 個小學生一樣重跟 3 隻北極熊一樣重能在 21 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Akainacephalus 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)

Akainacephalus 時速約 17 公里 (11 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

Akainacephalus is the most complete ankylosaurid dinosaur ever found from the southern part of ancient Laramidia.1

Its skull was covered with raised, cone-shaped and pyramid-shaped bony plates called caputegulae.1

This dinosaur had a massive tail club made of two large bones fused together.1

Akainacephalus lived about 76 million years ago during the Campanian stage of the Late Cretaceous.1

Its closest relatives include Nodocephalosaurus from New Mexico and Asian ankylosaurids like Saichania.1

The only known specimen was discovered in a bonebed that also contained fossils of other animals.1

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

?How big was Akainacephalus?

Scientists do not know its exact size because no complete skeleton has been found. The only known specimen includes about 45% of the skeleton, so its total length and weight are still uncertain.2 1

?What did Akainacephalus eat?

Akainacephalus was a plant-eater. Like other ankylosaurids, it had a narrow, U-shaped beak and teeth suited for cropping and chewing tough plants.2

?Did Akainacephalus have a tail club?

Yes. Akainacephalus had a complete tail club made of two large bones fused together, which it could have used for defense.2 1

?Where was Akainacephalus found?

Akainacephalus was discovered in southern Utah, USA, in the Kaiparowits Formation of the Grand Staircase, Escalante National Monument. The site is called the Horse Mountain Gryposaur Quarry.2 1

迷思破解王

迷思： Akainacephalus could roll into a ball like an armadillo.

真相： No ankylosaur could roll into a ball. Akainacephalus defended itself with its bony armor and tail club.1

給恐龍專家

學名: Akainacephalus
命名者: Wiersma and Irmis 20183
類群: 甲龍類
科 / 演化支: Ankylosauridae3
分類: Ornithischia > Ankylosauria > Ankylosauridae > Thyreophora3
岩石的年代: 84 到 72 百萬年 (Campanian)3
岩層: Kaiparowits3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Akainacephalus was named in 2018 by paleontologists Jelle Wiersma and Randall Irmis. The skeleton was found in the Kaiparowits Formation of southern Utah, USA.3 1
仍有爭議: Scientists are still debating exactly how Akainacephalus is related to other ankylosaurids, especially those from Asia.1