恐龍卡第 1532 張，共 2 027 張

Rajasaurus

名字的意思： “princely lizard”1

吃：肉肉食恐龍白堊紀晚期

Rajasaurus was a meat-eating dinosaur that lived in India near the end of the Cretaceous Period. It had a single short horn on its forehead and used its strong neck and jaws to catch prey. This dinosaur was an ambush predator, hiding and then pouncing on its food.1

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

Gujarat and Madhya Pradesh, India2 4

長度

6.6 m (22 ft)1 2

體重

4 公噸 (8,800 lb)2

高度

2.44 m (8 ft)3

最高速度

時速約 25 公里（16 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？

牠有多重？

跟 2.5 台汽車一樣重

跟 7 隻狗從鼻子接到尾巴一樣長跟 37 根香蕉頭尾相接一樣長跟 200 隻狗一樣重跟 800 顆西瓜一樣重跟 5 整班小學生一樣重跟 9 隻北極熊一樣重能在 14 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Rajasaurus 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)

Rajasaurus 時速約 25 公里 (16 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

Rajasaurus had a single low horn on its forehead made mostly of nasal bone, unlike the horn of its relative Majungasaurus.2

It was one of the larger abelisaurids, measuring about 6.6 metres (22 feet) long.1

Rajasaurus lived on the island of India during the Late Cretaceous, when India was isolated from other continents.1

Its fossils were found in the Lameta Formation, which was once a river valley with an arid or semi-arid climate.2

The horn on its head might have been used for display or for head-butting other Rajasaurus during fights.1 2

Rajasaurus had short arms and four fingers, so it relied on its powerful head and jaws to catch prey.2

It is the first Indian theropod dinosaur to have preserved bones from the spine, hips, legs, and tail.2

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

?How big was Rajasaurus?

Rajasaurus was about 6.6 metres (22 feet) long, though one scientist estimated it at 11 metres (36 feet). It weighed around 4 metric tons (4.4 short tons).2 1

?What did Rajasaurus eat?

Rajasaurus was a carnivore that ate meat. It probably hunted large prey like sauropod dinosaurs and may have also scavenged for food.1 3

?Did Rajasaurus have feathers?

No one knows for sure. The fossils don't show feathers, and most abelisaurids are not known to have had them, but some scientists think many theropods might have had simple feathers.2 1

?Was Rajasaurus bigger than T. rex?

No, Rajasaurus was smaller. T. rex could reach about 12 metres (40 feet) long, while Rajasaurus was only about 6.6 metres (22 feet) long.1 2

?Why did Rajasaurus have a horn?

The horn was probably used for display to attract mates or for head-butting other Rajasaurus during fights. It was made mostly of nasal bone.1 2

?Could Rajasaurus swim?

Probably not. It was a land dinosaur with strong legs for walking and running, not swimming. It lived near rivers but likely stayed on land.2 1

?When did Rajasaurus live?

Rajasaurus lived during the Late Cretaceous period, about 72 to 66 million years ago, right before the dinosaurs went extinct.1 2

?What would happen if Rajasaurus was alive today?

It would be a large predator, but it would probably not survive well because its habitat and prey are gone. It might be kept in zoos or studied by scientists.1 2

給恐龍專家

學名: Rajasaurus
命名者: Wilson et al. 20034
類群: 肉食恐龍
科 / 演化支: Abelisauridae4
分類: Theropoda > Ceratosauria > Abelisauridae4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Lameta4
國家: 印度4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Rajasaurus was named in 2003 by Jeffrey A. Wilson and colleagues. The fossils were found in the Lameta Formation of Gujarat, India, after dinosaur eggs were discovered there in 1981.2 4
仍有爭議: Scientists are not sure what the horn on its head was used for. It may have been for display or for head-butting, but no one knows for certain.1