恐龍卡第 1865 張，共 2 027 張

Uragasaurus

名字的意思： “snake lizard”1

吃：植物長脖子恐龍侏羅紀晚期到白堊紀早期

Uragasaurus was a long-necked plant-eater that lived in what is now Thailand. It had a snake-like neck and a backbone with air pockets that made it lighter. This dinosaur is one of the first of its family found in Southeast Asia.1

生存年代

149 到 137 百萬年前4

侏羅紀晚期到白堊紀早期

化石發現地

Phu Noi Locality, Kalasin Province, northeastern Thailand1

長度

最多 20 m (66 ft)2

高度

4.5 m (15 ft)

估計值

最高速度

時速約 12 公里（7 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

跟 4 台汽車排成一排一樣長跟 110 根香蕉頭尾相接一樣長高到能從 2 樓的窗戶往裡看能在 30 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Uragasaurus 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)

Uragasaurus 時速約 12 公里 (7 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

Uragasaurus is known from just one well-preserved backbone bone from the front of the back, called an anterior dorsal vertebra.1

The backbone had a Y-shaped pattern of bony ridges that is unique to this dinosaur.1

CT scans showed that the inside of the backbone was filled with tiny air spaces, a feature called camellate structure, which made the skeleton lighter.1

Uragasaurus lived during the latest Jurassic period, about 149 to 137 million years ago.4

It belongs to a group called Mamenchisauridae, which were famous for their extremely long necks.1

This dinosaur was discovered in the Phu Kradung Formation, a rock layer that also contains fossils of sharks, turtles, and other dinosaurs.1

Uragasaurus is the first officially named mamenchisaurid dinosaur from Thailand.1

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

?How big was Uragasaurus?

Scientists do not know for sure because only one backbone bone has been found. Based on its relatives, it was probably a large, long-necked plant-eater.3 1

?What did Uragasaurus eat?

It was a plant-eater, like all sauropods. It probably ate ferns, cycads, and other plants that grew in its habitat.3

?When did Uragasaurus live?

It lived during the late Jurassic to early Cretaceous periods, about 150 to 130 million years ago.3

?Where was Uragasaurus found?

Its fossils were found in Kalasin Province, northeastern Thailand, in the Phu Kradung Formation.3 1

?Is Uragasaurus a dinosaur?

Yes, it is a dinosaur. It is a type of long-necked sauropod dinosaur called a mamenchisaurid.3

?Why is it called Uragasaurus?

The name means 'serpent lizard' in Sanskrit and Greek, because its family is famous for having very long, snake-like necks.3

給恐龍專家

學名: Uragasaurus
命名者: Nilpanapan et al. 20264
類群: 長脖子恐龍
科 / 演化支: Mamenchisauridae4
分類: Sauropodomorpha > Sauropoda4
岩石的年代: 149 到 137 百萬年 (Tithonian / Berriasian)4
岩層: Phu Kradung4
國家: 泰國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Uragasaurus was named in 2026 by a team of scientists led by A. Nilpanapan. The fossil was found at the Phu Noi site in Kalasin Province, Thailand, and is kept at Mahasarakham University.1 4
仍有爭議: Scientists are not sure exactly how old the rocks are that contained Uragasaurus, so its age is estimated as latest Jurassic, possibly into the earliest Cretaceous.1