恐龍卡第 1705 張，共 2 027 張

Stegoceras

名字的意思： “horn roof”1

吃：植物腫頭龍類白堊紀晚期

Stegoceras was a small dinosaur with a thick, bony dome on its head. It lived in North America during the Late Cretaceous period, about 77 to 74 million years ago. Scientists think it used its dome for head-butting or showing off to other Stegoceras.1

生存年代

84 到 66 百萬年前4

白堊紀晚期

化石發現地

Alberta, Canada, and New Mexico, USA1 2

長度

2 到 2.5 m (6.6 到 8.2 ft)1

體重

10 kg 到 40 kg (22 到 88 lb)1

最高速度

時速約 39 公里（24 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 2 隻狗一樣重

跟 2.5 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長跟 10 隻家貓一樣重跟 8 顆西瓜一樣重跟 2 個幼兒園小朋友一樣重跟 1 個小學生一樣重能在 9.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Stegoceras 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)

Stegoceras 時速約 39 公里 (24 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

Stegoceras had a thick, smooth dome on top of its skull that grew bigger as it got older.1

The back of its skull had a shelf with small horns made from knobby bumps.1

It had a stiff tail and a broad pelvis, which might have held a big gut for digesting plants.1

Stegoceras was one of the first dome-headed dinosaurs ever discovered, known from skull domes found in 1898.1

Its teeth were small and serrated, good for shearing plants but not for chewing tough fibers.1

Scientists once thought some flat-headed pachycephalosaurs were different species, but they may just be young Stegoceras.1

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

?How big was Stegoceras?

About 2 to 2.5 metres (6.6 to 8.2 ft) long and weighed around 10 to 40 kilograms (22 to 88 lb).1

?What did Stegoceras eat?

It was an herbivore, eating plants. Its small, serrated teeth were good for shearing leaves, seeds, and fruit.1 2

?Did Stegoceras really head-butt?

Scientists are not sure. Some think it used its dome for head-butting or flank-butting, while others think it was for showing off or recognizing its own kind.1 3

?When did Stegoceras live?

It lived during the Late Cretaceous period, about 77.5 to 74 million years ago.1 2

?Where was Stegoceras found?

Fossils have been found in Canada (Alberta) and the USA (New Mexico).1 2

?Is Stegoceras a dinosaur?

Yes, it is a pachycephalosaurid dinosaur, a dome-headed dinosaur.1 2

迷思破解王

迷思： Many people think Stegoceras used its dome only for head-butting like a battering ram.

真相： Scientists debate whether the dome was used for head-butting, flank-butting, or just for display to attract mates.1

給恐龍專家

學名: Stegoceras
命名者: Lambe 19024
類群: 腫頭龍類
科 / 演化支: Eupachycephalosauria4
分類: Ornithischia > Pachycephalosauria4
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)4
岩層: Judith River, Dinosaur Park, Fruitland4
國家: 美國, 加拿大4
化石紀錄: The Paleobiology Database 收錄 46 筆4
又名: Gravitholus, Hanssuessia, Ornatotholus （舊名稱現在也算作同一種動物）4
發現: Stegoceras was named by paleontologist Lawrence Lambe in 1902, based on partial skull domes found in Alberta, Canada, in 1898 and 1901.1
仍有爭議: Scientists are still unsure whether the species Stegoceras novomexicanum from New Mexico really belongs to Stegoceras or to a different dinosaur.1