恐龍卡第 0221 張，共 2 027 張

Bagaraatan

名字的意思： “small predator”1

吃：肉暴龍類白堊紀晚期

Bagaraatan was a small, fast meat-eating dinosaur that lived in what is now Mongolia. It had a strong jaw with sharp teeth and long, slender legs for chasing prey. Scientists think it was about as long as a car!2

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

Nemegt Formation, Mongolia4 2

長度

3 到 3.5 m (9.8 到 11 ft)2

高度

最多 1 m (3.3 ft)2

最高速度

時速約 50 公里（31 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？

跟 4 隻狗從鼻子接到尾巴一樣長跟 19 根香蕉頭尾相接一樣長能在 7.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Bagaraatan 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)

Bagaraatan 時速約 50 公里 (31 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

Bagaraatan had a tail that was not very flexible near the body, because many bones in the tail were locked together.2

The first fossil of Bagaraatan was found in 1970 by Zofia Kielan-Jaworowska during a Polish-Mongolian expedition.2

At first, scientists thought Bagaraatan was a mix of different dinosaur parts, but later studies showed it is likely a small relative of Tyrannosaurus.1

Bagaraatan was about 3 to 3.5 meters long, which is similar to a large Deinonychus.2

The shin and ankle bones of Bagaraatan were fused together, giving it a strong lower leg.2

Bagaraatan had two holes in the back part of its lower jaw, which is unusual among theropod dinosaurs.2

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

?How big was Bagaraatan?

About 3 to 3.5 metres (10 to 11.5 feet) long, which is about as long as a small car. It stood less than 1 metre (3.3 feet) tall at the hips.1 2

?What did Bagaraatan eat?

It was a meat-eater. It had strong jaws with sharp teeth and long legs for chasing prey, so it was probably an active predator or scavenger.2

?Was Bagaraatan a dinosaur?

Yes, it was a theropod dinosaur from the Late Cretaceous period. It lived in what is now Mongolia.1

?Is Bagaraatan related to T. rex?

Yes, scientists now think Bagaraatan was a small relative of Tyrannosaurus rex. The fossil is from a juvenile tyrannosaurid, one of the smallest known.1 3

迷思破解王

迷思： Bagaraatan was a bird-like dinosaur with feathers.

真相： Scientists have not found any evidence of feathers for Bagaraatan, and it is now thought to be a small tyrannosaurid, which probably had scaly skin like other tyrannosaurs.1

給恐龍專家

學名: Bagaraatan
命名者: Osmólska 19964
類群: 暴龍類
科 / 演化支: Tyrannosauridae4
分類: Theropoda > Tyrannosauroidea > Tyrannosauridae4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Nemegt4
國家: 蒙古4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Bagaraatan was named in 1996 by Halszka Osmólska based on a partial skeleton found in Mongolia. The skeleton was discovered by Zofia Kielan-Jaworowska in 1970.4 2
仍有爭議: Scientists are still debating whether Bagaraatan is a true tyrannosaurid or a close relative, and whether the fossils include bones from more than one animal.1