恐龍卡第 1445 張，共 2 027 張

Platytholus

名字的意思： “flattened dome”1

吃：植物腫頭龍類白堊紀晚期

Platytholus was a small, dome-headed dinosaur that lived near the end of the Age of Dinosaurs. It walked on two legs and munched on plants with its beak-like mouth. Its skull had a flat, wide dome on top, which it may have used for head-butting contests.1 4

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

Garfield County, Montana, USA1 4

長度

1 到 2 m (3.3 到 6.6 ft)2

體重

10 kg 到 40 kg (22 到 88 lb)2

高度

0.5 到 1 m (1.6 到 3.3 ft)2

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？

牠有多高？

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 9.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Platytholus 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)

Platytholus 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

Platytholus lived about 72 to 66 million years ago, during the Maastrichtian stage of the Late Cretaceous.2

Its name means 'flattened dome' because its skull was wide and flat on top, unlike the tall domes of some other pachycephalosaurs.1

The only known fossil of Platytholus is a partial skull, discovered in the Hell Creek Formation of Montana.1

Platytholus was a pachycephalosaur, a group of dinosaurs known for their thick, bony skulls.1

Scientists think Platytholus may have used its flat dome for head-butting, like some other dome-headed dinosaurs.1

The species name clemensi honors paleontologist William A. Clemens Jr.1

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

?How big was Platytholus?

It was a medium sized pachycephalosaur, with a skull dome about 21 centimetres long and 7.8 centimetres thick. It was smaller than Pachycephalosaurus but larger than Sphaerotholus.1

?Did Platytholus have feathers?

No direct evidence of feathers has been found for Platytholus. However, its skull had blood vessels that suggest a covering of keratin, like a bristly brush cut, not feathers.3

?What did Platytholus eat?

Platytholus was a plant eater. It had a beak-like mouth and munched on plants.1

?Could Platytholus head-butt?

Scientists are not sure. The skull had a healed injury, but some experts think the dome was too fragile for head-butting and was mainly used for display.3

給恐龍專家

學名: Platytholus
命名者: Horner et al. 20234
類群: 腫頭龍類
科 / 演化支: Pachycephalosauridae4
分類: Ornithischia > Pachycephalosauria4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Hell Creek4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The first Platytholus fossil, a partial skull, was found in the early 2000s in Montana. In 2023, paleontologists John Horner, Mark Goodwin, and David Evans named it Platytholus clemensi.1
仍有爭議: Scientists are not sure if Platytholus used its flat dome for head-butting or for display, since its dome is different from the tall domes of other pachycephalosaurs.1