恐龍卡第 0904 張，共 2 027 張

Jeholosaurus

名字的意思： “lizard from Jehol”1

吃：植物有喙的草食恐龍白堊紀早期

Jeholosaurus was a small, speedy plant-eater that lived in ancient China. It had a beak and cheek teeth for chomping plants, but its front teeth were sharp like a meat-eater's, so it might have eaten a few bugs too!1

生存年代

126 到 120 百萬年前3

白堊紀早期

化石發現地

Liaoning Province, China1

長度

0.711 m (2.3 ft)1

最高速度

時速約 41 公里（25 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？

跟 4 根香蕉頭尾相接一樣長能在 8.8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Jeholosaurus 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)

Jeholosaurus 時速約 41 公里 (25 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

Jeholosaurus had a very fast tooth replacement rate, with new teeth growing every 46 days, faster than most early plant-eaters.1

Its eye socket was huge, making up 40% of the skull length, which is a sign it was a young animal.1

The front teeth were narrow and long, like a meat-eater's, but the back teeth were fan-shaped for chewing plants.1

It had a row of small holes on its nose bone, a feature not seen in any other dinosaur.1 2

The hip bone pointed backward, which is typical for ornithischian dinosaurs, but it also had a forward-pointing bone that supported its belly.1

All known fossils are from young animals, so scientists don't know exactly how big an adult could get.1

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

?How big was Jeholosaurus?

The known fossils are from young animals, so the adult size is unknown. The largest specimen is about 71 centimetres long, with a skull of 6.3 centimetres.1

?What did Jeholosaurus eat?

It mostly ate plants, using its beak and fan-shaped cheek teeth. But its front teeth were sharp like a meat-eater's, so it might have also eaten small animals or bugs.1

?Was Jeholosaurus a dinosaur?

Yes, Jeholosaurus was a small ornithischian dinosaur, a group of plant-eating dinosaurs with bird-like hips.1

?Why did Jeholosaurus have a beak?

The beak helped it nip off plants. Its cheek teeth were fan-shaped for grinding them up, and it may have had fleshy cheeks to hold food while chewing.1

迷思破解王

迷思： Jeholosaurus was a meat-eater because it had sharp front teeth.

真相： Its back teeth were for chewing plants, and it likely ate plants, though it might have eaten some insects or small animals too.1

給恐龍專家

學名: Jeholosaurus
命名者: Xu et al. 20003
類群: 有喙的草食恐龍
科 / 演化支: Thescelosauridae3
分類: Ornithischia3
岩石的年代: 126 到 120 百萬年 (Barremian / Aptian)3
岩層: Yixian3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 2 筆3
發現: The first fossils were found in 2000 at Lujiatun near Beipiao City, China, and named by Xu Xing and colleagues the same year.1
仍有爭議: Scientists still debate whether Jeholosaurus was a plant-eater or an omnivore, because its front teeth were sharp and its back teeth were for plants.1