恐龍卡第 1952 張，共 2 027 張

Xuanhanosaurus

吃：肉肉食恐龍侏羅紀中期

Xuanhanosaurus was a meat-eating dinosaur that stomped around China about 168 million years ago. It was a medium-sized hunter with strong arms and sharp teeth. Imagine a big lizard built for chasing prey!1 2

生存年代

171 到 168 百萬年前6

侏羅紀中期

化石發現地

Xuanhanosaurus fossils were found in Xuanhan County, Sichuan Basin, southwestern China.1

長度

6 m (20 ft)1

體重

250 kg 到 265 kg (551 到 584 lb)4 5

高度

1.9 m (6.2 ft)

估計值

最高速度

時速約 47 公里（29 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 13 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 33 根香蕉頭尾相接一樣長跟 53 顆西瓜一樣重跟 14 個幼兒園小朋友一樣重跟 8 個小學生一樣重能在 7.7 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Xuanhanosaurus 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)

Xuanhanosaurus 時速約 47 公里 (29 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

Xuanhanosaurus had a forearm that was relatively massive and long, which is unusual for a meat-eating dinosaur of its time.1

Its humerus, the upper arm bone, was straight and had a medial deltopectoral crest, a feature that helped attach strong muscles.1

The ratio of the maximum length of its humerus to its radius was 1.3, which scientists say is extremely conservative for a carnosaur.1

Xuanhanosaurus had a metacarpal III that was comparatively massive, and its metacarpal IV was short and light.1

The fossils come from the Lower Shaximiao Formation, which is Middle Jurassic in age, about 170 to 168 million years old.2

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

?How big was Xuanhanosaurus?

About 4.8 metres (16 feet) long and weighed around 265 kilograms (585 pounds).4

?Did Xuanhanosaurus walk on four legs?

Probably not. The scientist who first described it thought it might, but later experts say it walked on its hind legs like other meat-eating dinosaurs.4

?What does Xuanhanosaurus mean?

Xuanhanosaurus means 'Xuanhan lizard,' named after Xuanhan County in Sichuan, China, where it was found.4

?When did Xuanhanosaurus live?

It lived during the Middle Jurassic, about 166 million years ago.4

?What did Xuanhanosaurus eat?

It was a meat-eater (theropod dinosaur) that likely hunted other animals with its sharp teeth and strong arms.4

?Why did Xuanhanosaurus have strong arms?

Its strong arms may have been useful for catching prey, even though it walked on two legs.4

給恐龍專家

學名: Xuanhanosaurus
命名者: Dong 19846
類群: 肉食恐龍
科 / 演化支: Piatnitzkysauridae6
分類: Theropoda6
岩石的年代: 171 到 168 百萬年 (Bajocian)6
岩層: Shaximiao6
國家: 中國6
化石紀錄: The Paleobiology Database 收錄 1 筆6
發現: Xuanhanosaurus was named by Chinese paleontologist Dong Zhiming in 1984. The fossils were found in the Sichuan Basin, and the dinosaur was described as a new genus and species.1 2
仍有爭議: Scientists debate whether Xuanhanosaurus belongs to the Megalosauridae family or to a group called Piatnitzkysauridae, so its exact family tree is still uncertain.3