恐龍卡第 1696 張，共 2 027 張

Sphaerotholus

名字的意思： “ball dome”1

吃：植物腫頭龍類白堊紀晚期

Sphaerotholus was a dome-headed dinosaur that lived near the end of the Age of Dinosaurs. It had a thick, bony dome on its skull and probably used it for head-butting contests.1

生存年代

84 到 66 百萬年前2

白堊紀晚期

化石發現地

Western United States (Montana, New Mexico) and Canada (Alberta, Saskatchewan)2 1

長度

2 m (6.6 ft)1

體重

40 kg (88 lb)1

最高速度

時速約 44 公里（27 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 4 隻家貓從鼻子接到尾巴一樣長跟 11 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 8.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Sphaerotholus 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)

Sphaerotholus 時速約 44 公里 (27 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

Sphaerotholus lived for a long time, about 7 to 8 million years, and spread across a wide area from New Mexico to Montana.1

There are five known species of Sphaerotholus, each with slightly different bumps and nodes on the back of their skulls.1

One species, S. triregnum, had a triple row of small bony nodes on its skull, making it look like it wore a triple crown.1

Another species, S. lyonsi, had a double row of small nodes, while others had a single row of large nodes.1

The name Sphaerotholus means 'ball dome', which describes its round, dome-shaped skull.1

Sphaerotholus is considered a highly evolved, or derived, pachycephalosaur.1

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

?How big was Sphaerotholus?

Sphaerotholus edmontonensis reached about 2 metres (6.6 feet) in length and weighed around 40 kilograms (88 pounds). Other species were probably a similar size.1

?What did Sphaerotholus eat?

Sphaerotholus was a plant-eater. Like other pachycephalosaurs, it had teeth suited for eating tough plants.1

?When did Sphaerotholus live?

Sphaerotholus lived during the Late Cretaceous, from about 76 to 66 million years ago.1

?Where did Sphaerotholus live?

Sphaerotholus lived in what is now the western United States and Canada, from New Mexico to Montana and Alberta.1

?How many species of Sphaerotholus are there?

There are five known species: S. goodwini, S. buchholtzae, S. edmontonensis, S. lyonsi, and S. triregnum.1

?Why did Sphaerotholus have a dome?

Sphaerotholus had a thick, bony dome on its skull that it probably used for head-butting contests, like other dome-headed dinosaurs.1

迷思破解王

迷思： Some people think Sphaerotholus used its dome for ramming like a battering ram.

真相： Scientists are not sure. The dome might have been for head-butting, but it could also have been for showing off to mates or recognizing each other.1

給恐龍專家

學名: Sphaerotholus
命名者: Williamson and Carr 20032
類群: 腫頭龍類
科 / 演化支: Pachycephalosauridae2
分類: Ornithischia > Pachycephalosauria2
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)2
岩層: Hell Creek, Kirtland, Frenchman2
國家: 美國, 加拿大2
化石紀錄: The Paleobiology Database 收錄 6 筆2
發現: The first species, Sphaerotholus goodwini, was named by Thomas Williamson and Thomas Carr in 2002 from a partial skull found in New Mexico. The species name honors paleontologist Mark Goodwin.1
仍有爭議: Scientists still debate whether some species, like S. edmontonensis, are really separate or just the same as others, because their skulls look very similar.1