恐龍卡第 0551 張，共 2 027 張

Duonychus

名字的意思： “two-clawed”1

吃：植物奇特的羽毛恐龍白堊紀晚期

Duonychus was a weird, plant-eating dinosaur with only two fingers on each hand, unlike most other meat-eating dinosaurs. It used its big, curved claws to grab branches and pull leaves close to its mouth. It lived in what is now Mongolia during the Late Cretaceous Period.1

生存年代

100 到 84 百萬年前5

白堊紀晚期

化石發現地

Urlibe Khudak locality, Bayanshiree Formation, Gobi Desert, Mongolia5 1

長度

3 m (9.8 ft)2 3

體重

259 kg 到 268 kg (571 到 591 lb)1 4

高度

1.2 m (3.9 ft)

估計值

最高速度

時速約 28 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 13 隻狗一樣重

跟 3 隻狗從鼻子接到尾巴一樣長跟 17 根香蕉頭尾相接一樣長跟 54 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 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Duonychus 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)

Duonychus 時速約 28 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

Duonychus is the first therizinosaur known to have only two fingers on each hand, instead of the usual three.1

The fossil includes a rare preserved keratinous claw, the hard material that covered the bone, which is almost never found in dinosaurs.1

Its name means 'two-clawed', and the species name honors Mongolian paleontologist Khishigjav Tsogtbaatar.1

Duonychus lived about 95 to 89 million years ago, during the Cenomanian to Santonian stages.1

The strong curve of its claws and high flexibility suggest it was a grasping animal, using its hands to pull down branches.1

Duonychus is a therizinosaur, a group of dinosaurs that, despite being meat-eater relatives, turned to eating plants.1

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

?How big was Duonychus?

About 3 metres long and weighed around 260 kilograms.2

?What did Duonychus eat?

It was a plant-eater. It used its big, curved claws to grab branches and pull leaves to its mouth.2 1

?Why did Duonychus have only two fingers?

Scientists are not sure why, but it is the first therizinosaur known to have only two fingers on each hand instead of three. This helped it grasp vegetation.2 1

?Did Duonychus have feathers?

The fossil does not preserve feathers, but many therizinosaurs are thought to have had feathers. Duonychus was a theropod dinosaur, and many theropods had feathers.2

?When did Duonychus live?

It lived about 95 to 89 million years ago, during the Late Cretaceous Period.2 1

?Could Duonychus climb trees?

Probably not. Its claws were best for grasping branches and pulling them down to eat, not for climbing.1

迷思破解王

迷思： Some people think Duonychus was a fast, fierce predator because it had big claws.

真相： Actually, Duonychus was a plant-eater, and its claws were for grasping vegetation, not for hunting.1

給恐龍專家

學名: Duonychus
命名者: Kobayashi et al. 20255
類群: 奇特的羽毛恐龍
科 / 演化支: Therizinosauridae5
分類: Theropoda > Therizinosauria5
岩石的年代: 100 到 84 百萬年 (Cenomanian / Santonian)5
岩層: Baynshire5
國家: 蒙古5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Duonychus was named by Kobayashi and colleagues in 2025, based on a partial skeleton found in the Gobi Desert, Mongolia. The fossil was collected from the Urlibe Khudak locality.5 1
仍有爭議: Scientists are still debating why Duonychus lost one finger, since most therizinosaurs had three. It might have helped it grasp branches more effectively.1