恐龍卡第 1459 張，共 2 027 張

Polacanthus

名字的意思： “many thorn”1

吃：植物甲龍類白堊紀早期

Polacanthus was a medium-sized armoured dinosaur that lived in England during the Early Cretaceous. It had a big shield over its hips and many spikes on its back and tail to protect itself from predators.1

生存年代

139 到 100 百萬年前4

白堊紀早期

化石發現地

Isle of Wight and Sussex, England, and also Spain1 4

長度

4 到 5 m (13 到 16 ft)1

體重

227 kg 到 2 公噸 (500 到 4,400 lb)1

高度

1.5 m (4.9 ft)

估計值

最高速度

時速約 20 公里（12 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 1.5 台汽車一樣重

跟 5 隻狗從鼻子接到尾巴一樣長跟 28 根香蕉頭尾相接一樣長跟 100 隻狗一樣重跟 400 顆西瓜一樣重跟 2.5 整班小學生一樣重跟 4 隻北極熊一樣重能在 18 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Polacanthus 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)

Polacanthus 時速約 20 公里 (12 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

Polacanthus had a large fused plate of bone over its hips called a 'pelvic shield', which was about 108 centimetres wide and 90 centimetres long.1

Its body was covered with many spikes and small bony studs called ossicles.1

The first fossil of Polacanthus was discovered by the Reverend William Fox on the Isle of Wight in 1865.1

Polacanthus lived about 130 to 125 million years ago during the Early Cretaceous.1

Scientists are not sure if Polacanthus belongs to the Nodosauridae family or its own family, the Polacanthidae.1

A second species, Polacanthus rudgwickensis, was named in 1996 but later moved to its own genus Horshamosaurus in 2015.1

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

?How big was Polacanthus?

Polacanthus grew to about 4 to 5 metres (13 to 16 feet) long. Estimates of its weight vary significantly, with some scientists suggesting it weighed around 2 tonnes (4,400 pounds), while others estimate it was much lighter.1

?What did Polacanthus eat?

Polacanthus was a herbivore, meaning it ate plants. Its teeth and body were built for eating vegetation.1

?Did Polacanthus have a tail club?

No, Polacanthus did not have a tail club like Ankylosaurus. Instead, its tail had spikes and bony plates for protection.1

?Where was Polacanthus found?

Polacanthus fossils have been found in England, especially on the Isle of Wight. The first fossil was discovered there in 1865 by the Reverend William Fox.1 3

?When did Polacanthus live?

Polacanthus lived during the Early Cretaceous Period, about 130 to 125 million years ago.1

?How fast could Polacanthus run?

Nobody knows for sure how fast Polacanthus could run, but it walked on all fours and had relatively long hindlimbs for an ankylosaur, which might have allowed it to move fairly quickly.1

迷思破解王

迷思： Polacanthus could swing its tail like a club.

真相： Polacanthus did not have a tail club; its tail was covered in spikes but lacked the heavy bony club seen in some other ankylosaurs.1

給恐龍專家

學名: Polacanthus
命名者: Fox 18664
類群: 甲龍類
科 / 演化支: Nodosauridae4
分類: Ornithischia > Ankylosauria > Nodosauridae > Thyreophora4
岩石的年代: 139 到 100 百萬年 (Berriasian / Albian)4
岩層: Wessex, Vectis, Pinilla de los Moros4
國家: 英國, 西班牙4
化石紀錄: The Paleobiology Database 收錄 16 筆4
又名: Euacanthus, Vectensia （舊名稱現在也算作同一種動物）4
發現: Polacanthus was discovered by Reverend William Fox on the Isle of Wight in 1865. The name was first used by Richard Owen in a lecture later that year, and the full description was published by Fox in 1866.1
仍有爭議: Scientists still debate whether Polacanthus was a nodosaurid or belonged to a separate family called Polacanthidae.1