恐龍卡第 0411 張，共 2 027 張

Choyrodon

名字的意思： “Choyr tooth, named after the city of Choyr in Mongolia and the Latin word for tooth”1

吃：植物有喙的草食恐龍白堊紀早期

Choyrodon was a plant-eating dinosaur that lived in Mongolia about 110 to 100 million years ago. It had a beak and lots of teeth for munching plants. It was a cousin of the famous duck-billed dinosaurs.1 2

生存年代

110 到 100 百萬年前5

白堊紀早期

化石發現地

Fossils were found in the Khuren Dukh Formation in southeastern Mongolia.3

長度

最多 6.2 m (20 ft)4

體重

最多 1 公噸 (2,200 lb)4

高度

1.9 m (6.2 ft)

估計值

最高速度

時速約 33 公里（21 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 50 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 34 根香蕉頭尾相接一樣長跟 200 顆西瓜一樣重跟 53 個幼兒園小朋友一樣重跟 31 個小學生一樣重跟 2 隻北極熊一樣重能在 11 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Choyrodon 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)

Choyrodon 時速約 33 公里 (21 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

Choyrodon had an open hole in its skull called an antorbital fenestra, which is a primitive feature, but it also had advanced features like a downturned jaw and a big nostril opening.3

The type specimen of Choyrodon was a subadult when it died, meaning it was not fully grown.3

Choyrodon lived in the same place and time as another plant-eating dinosaur called Altirhinus, but they were different species.3

Scientists think Choyrodon was closely related to a North American dinosaur called Eolambia.3

Choyrodon had a beak with a flattened bottom edge and a row of small holes along the side, which is unusual.3

The fossils of Choyrodon were found in rocks that are about 110 to 100 million years old, from the Albian age of the Early Cretaceous.2

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

?Did Choyrodon have feathers?

No, scientists think Choyrodon did not have feathers. It was an ornithopod dinosaur with scaly skin like a lizard.1

?How big was Choyrodon?

Choyrodon was a medium sized dinosaur. Based on the fossils, it was about 4 metres long, roughly the size of a small car.3

?What did Choyrodon eat?

Choyrodon was a herbivore, meaning it ate plants like ferns, cycads and leaves. It used its beak to chop off bits of plants and its many teeth to grind them up.1 5

給恐龍專家

學名: Choyrodon
命名者: Gates et al. 20185
類群: 有喙的草食恐龍
科 / 演化支: Iguanodontia5
分類: Ornithischia > Ornithopoda > Iguanodontia5
岩石的年代: 110 到 100 百萬年 (Albian)5
岩層: Khuren Dukh5
國家: 蒙古5
化石紀錄: The Paleobiology Database 收錄 2 筆5
發現: Three partial skeletons were found in Mongolia by an expedition led by Mongolian paleontologist Rinchen Barsbold. In 2018, American paleontologist Terry Gates and colleagues named the dinosaur Choyrodon barsboldi, honoring Barsbold.1 3
仍有爭議: Scientists are still debating exactly where Choyrodon fits in the dinosaur family tree, because it has a mix of primitive and advanced features.3