恐龍卡第 0761 張，共 2 027 張

Gualicho

名字的意思： “named after the gualichu, a demon from local folklore”1

吃：肉暴龍類白堊紀早期

Gualicho was a medium-sized meat-eating dinosaur that lived in what is now Argentina. It had very short arms with only two fingers, a bit like a tiny T. rex! Scientists are still arguing about which group of theropods it belongs to.1 2

生存年代

110 到 106 百萬年前4

白堊紀早期

化石發現地

Río Negro Province, northern Patagonia, Argentina1 2

長度

6 到 7 m (20 到 23 ft)1

高度

2.3 m (7.5 ft)

估計值

最高速度

時速約 34 公里（21 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 7 隻狗從鼻子接到尾巴一樣長跟 39 根香蕉頭尾相接一樣長能在 11 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Gualicho 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)

Gualicho 時速約 34 公里 (21 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

Gualicho had only two fingers on each hand. The third finger was reduced to a tiny splint of bone.1 2

Its arms were very short, similar to the arms of Tyrannosaurus rex. This is an example of convergent evolution.1 2

The fossil was discovered on February 13, 2007, by Akiko Shinya, a preparator from the Field Museum of Natural History.1

Gualicho lived about 106 million years ago during the Early Cretaceous period.1

The skeleton was found in the Huincul Formation, which also produced the giant sauropod Argentinosaurus and the huge predator Mapusaurus.2

Scientists are not sure if Gualicho is a type of allosauroid or a tyrannosauroid. Different studies place it in different groups.1 4

The name Gualicho comes from a demon in the folklore of the Tehuelche people of Patagonia.1 2

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

?How big was Gualicho?

About 6 to 7 metres long. It weighed around 450 kilograms, which is about as much as a large polar bear.1 3

?Did Gualicho have feathers?

Nobody knows for sure. No feathers were found with the fossil, and it is not closely related to known feathered dinosaurs.1

?What did Gualicho eat?

It was a meat-eater, like other theropod dinosaurs. It probably hunted smaller animals or scavenged.1

?Why did Gualicho have short arms?

Scientists are not sure. Its arms were very short with only two fingers, similar to T. rex, but this evolved separately.3

?Is Gualicho a dinosaur?

Yes, it is a theropod dinosaur. It lived about 106 million years ago in what is now Argentina.1

?Was Gualicho bigger than T. rex?

No, it was much smaller. Gualicho was about 6 to 7 metres long, while T. rex could reach over 12 metres.1

迷思破解王

迷思： Gualicho is a small relative of Tyrannosaurus rex.

真相： Gualicho is not a close relative of T. rex. It is probably an allosauroid, a different branch of meat-eating dinosaurs. Its two-fingered hands evolved separately.1 2

給恐龍專家

學名: Gualicho
命名者: Apesteguia et al. 20164
類群: 暴龍類
科 / 演化支: Tyrannosauroidea4
分類: Theropoda > Tyrannosauroidea4
岩石的年代: 110 到 106 百萬年 (Albian)4
岩層: Huincul4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The only known fossil of Gualicho was found in 2007 by Akiko Shinya at a site called Violante's field in Argentina. It was named and described in 2016 by Sebastián Apesteguía and colleagues.1 2
仍有爭議: Scientists debate whether Gualicho is an allosauroid or a tyrannosauroid. Its exact place on the dinosaur family tree is still uncertain.1 4