恐龍卡第 1652 張，共 2 027 張

Siamraptor

名字的意思： “Siam robber, named after Siam, the old name for Thailand, and the Latin word for robber”1

吃：肉肉食恐龍白堊紀早期

Siamraptor was a meat-eating dinosaur that lived in what is now Thailand, about 121 to 113 million years ago. It was a fast and smart hunter with sharp claws and strong jaws. Scientists think it was one of the earliest big meat-eaters in its family.1 4

生存年代

121 到 113 百萬年前4

白堊紀早期

化石發現地

Fossils were found in the Khok Kruat Formation in Nakhon Ratchasima Province, Thailand.1 4

長度

7.9 到 9 m (26 到 30 ft)3

體重

3.175 公噸 (7,000 lb)3

高度

2.7 m (8.9 ft)

估計值

最高速度

時速約 27 公里（17 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 2 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長跟 160 隻狗一樣重跟 640 顆西瓜一樣重跟 4 整班小學生一樣重跟 7 隻北極熊一樣重能在 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Siamraptor 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)

Siamraptor 時速約 27 公里 (17 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

Siamraptor had a very light skeleton with lots of air spaces in its skull and backbone, which made it lighter and helped it breathe better.2

Its lower jaw had a deep oval hole and four small openings, which are special features not seen in other allosauroids.2

Siamraptor is the first named carcharodontosaurian dinosaur from Southeast Asia, which helps scientists understand how these dinosaurs spread across the world.1

The fossil bones show that Siamraptor had a huge number of air pockets and holes, a feature called skeletal pneumaticity, which is also seen in some other big meat-eaters.2

Siamraptor lived during the Aptian age, about 121 to 113 million years ago, when Thailand was part of a landmass with different animals than today.1 4

The name Siamraptor honors Suwat Liptapanlop, a supporter of fossil research in Thailand, with the species name 'suwati'.1

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

?How big was Siamraptor?

Siamraptor was about 7 to 8 metres (23 to 26 feet) long, roughly the size of a large bus. It was one of the earliest big meat-eaters in its family.1

?When did Siamraptor live?

Siamraptor lived during the Early Cretaceous, about 121 to 112 million years ago. That was during the Aptian age.1

?Where was Siamraptor found?

Siamraptor was found in Thailand, in the Khok Kruat Formation. The fossils were discovered near the village of Saphan Hin.1 2

?What did Siamraptor eat?

Siamraptor was a meat-eater, so it hunted other animals. It had sharp claws and strong jaws to catch and eat its prey.1

?Was Siamraptor a dinosaur?

Yes, Siamraptor was a dinosaur. It was a theropod, a group of meat-eating dinosaurs that walked on two legs.1

?Why is Siamraptor important?

Siamraptor is the first named carcharodontosaurian dinosaur from Southeast Asia. It helps scientists understand how these big meat-eaters spread across the world.1 2

迷思破解王

迷思： Some people think Siamraptor was a type of raptor like Velociraptor.

真相： Siamraptor was not a raptor. It belonged to a group called Carcharodontosauria, which were large meat-eaters, not the small feathered raptors.1

給恐龍專家

學名: Siamraptor
命名者: Chokchaloemwong et al. 20194
類群: 肉食恐龍
科 / 演化支: Carcharodontosauria4
分類: Theropoda > Allosauroidea4
岩石的年代: 121 到 113 百萬年 (Aptian)4
岩層: Khok Kruat4
國家: 泰國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Siamraptor was named in 2019 by a team of scientists including Duangsuda Chokchaloemwong and others, based on fossils found in Thailand between 2007 and 2009. The first fossil was a piece of the lower jaw, and more bones from at least three other individuals were found later.1
仍有爭議: Scientists are still debating exactly how Siamraptor is related to other carcharodontosaurs, because it has some features that are more primitive than later members of the group.2