恐龍卡第 1852 張，共 2 027 張

Udanoceratops

名字的意思： “Udan-Sayr horned face”1 2

吃：植物角龍類白堊紀晚期

Udanoceratops was a big, plant-eating dinosaur that lived in the Gobi Desert of Mongolia. It had a powerful beak and strong jaws that could bite through tough plants, maybe even bone! This dinosaur was one of the largest of its family, the leptoceratopsids.1 2

生存年代

84 到 72 百萬年前3

白堊紀晚期

化石發現地

Udan-Sayr locality, Ömnögovi Province, Mongolia1 3

長度

最多 4 m (13 ft)1

體重

最多 700 kg (1,500 lb)1

高度

1.4 m (4.6 ft)

估計值

最高速度

時速約 29 公里（18 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 35 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 22 根香蕉頭尾相接一樣長跟 140 顆西瓜一樣重跟 37 個幼兒園小朋友一樣重跟 22 個小學生一樣重能在 12 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Udanoceratops 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)

Udanoceratops 時速約 29 公里 (18 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

Udanoceratops is the largest known leptoceratopsid, reaching about 4 meters (13 feet) long and weighing around 700 kilograms (1,500 pounds).1

Its skull was deep and robust, with a smooth snout that had no horns or bumps, unlike many other horned dinosaurs.1

The lower jaw of Udanoceratops was very strong, and scientists think it could bite with enough force to possibly break bone.1

Its tail was tall and flattened from side to side, which some scientists once thought meant it lived in water, but now they think it helped the dinosaur walk on soft sand.1

Udanoceratops lived in the Gobi Desert during the Late Cretaceous, about 75 to 71 million years ago, alongside dinosaurs like Protoceratops and Velociraptor.1

The only known fossil of Udanoceratops was discovered by a joint Soviet-Mongolian expedition in the 1980s, and its bones were found inside hard calcium carbonate rocks.1

The species name, Udanoceratops tschizhovi, honors D. O. Tschizhov, a colleague of the scientist who first described it.1

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

?How big was Udanoceratops?

About 4 metres (13 feet) long and 700 kilograms (1,500 pounds). It was the largest known leptoceratopsid.1 2

?Did Udanoceratops have horns?

No, its snout was completely smooth with no horns or bumps, unlike many other horned dinosaurs.1

?What did Udanoceratops eat?

It was a herbivore, eating tough plants. Its powerful beak and strong jaws were used for shearing vegetation.1 2

?Could Udanoceratops swim?

Probably not. Scientists once thought it might be semi-aquatic because of its tall tail, but now they think that shape helped it walk on soft sand.1

?When did Udanoceratops live?

It lived during the Late Cretaceous period, about 81 to 71 million years ago.2

?Where was Udanoceratops found?

Its fossils were found in the Gobi Desert of Mongolia, at a place called Udan-Sayr.1 3

迷思破解王

迷思： Some people think Udanoceratops was a small dinosaur like other leptoceratopsids.

真相： Udanoceratops was actually the largest known leptoceratopsid, reaching about 4 meters long.1

給恐龍專家

學名: Udanoceratops
命名者: Kurzanov 19923
類群: 角龍類
科 / 演化支: Leptoceratopsidae3
分類: Ornithischia > Ceratopsia3
岩石的年代: 84 到 72 百萬年 (Campanian)3
岩層: Djadokhta3
國家: 蒙古3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Udanoceratops was named by Russian paleontologist Sergei Kurzanov in 1992. The fossils were found in the 1980s during a joint Soviet-Mongolian expedition at the Udan-Sayr locality in Mongolia.1 2
仍有爭議: Scientists are still debating whether Udanoceratops could walk on two legs or only on all fours, and whether it lived partly in water.1