恐龍卡第 1289 張，共 2 027 張

Nothronychus

名字的意思： “slothful claw”1

吃：植物奇特的羽毛恐龍白堊紀晚期

Nothronychus was a weird dinosaur that looked like a giant sloth with a beak. It had long arms with sharp claws and a big pot belly. Even though it was a theropod, it ate plants, not meat.1

生存年代

94 到 90 百萬年前4

白堊紀晚期

化石發現地

New Mexico and Utah, USA1 4

長度

4.2 到 5.3 m (14 到 17 ft)1 2

體重

800 kg 到 1.2 公噸 (1,800 到 2,600 lb)1

高度

2.2 m (7.2 ft)

估計值

最高速度

時速約 22 公里（14 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 60 隻狗一樣重

跟 5 隻狗從鼻子接到尾巴一樣長跟 29 根香蕉頭尾相接一樣長跟 240 顆西瓜一樣重跟 63 個幼兒園小朋友一樣重跟 38 個小學生一樣重跟 2.5 隻北極熊一樣重能在 16 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Nothronychus 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)

Nothronychus 時速約 22 公里 (14 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

Nothronychus was the first therizinosaur ever found in the Americas. All earlier therizinosaur fossils came from China and Mongolia.1

Its claws were up to 30 centimeters (12 inches) long and curved like hooks. Scientists think it used them to pull down branches to eat.1

Nothronychus had four forward-facing toes on each foot, which helped it walk slowly and steadily.1

One species, Nothronychus graffami, was found in rocks that were once under a shallow sea called the Western Interior Seaway. The dinosaur's bones were mixed with marine reptile fossils.1

Nothronychus lived about 94 to 89 million years ago, during the Late Cretaceous period.1 4

The first Nothronychus bone was mistaken for part of a horned dinosaur's skull. Only later did scientists realize it was a hip bone from a therizinosaur.1

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

?How big was Nothronychus?

It was about 4.2 to 5.3 metres (14 to 17 feet) long and weighed 800 to 1,200 kilograms (1,800 to 2,600 pounds).1

?What did Nothronychus eat?

It ate plants. Even though it was a theropod dinosaur, it was a herbivore.1 2

?Did Nothronychus have feathers?

No feather fossils have been found, but its relatives had feathers, so scientists think it probably did too.3

?When did Nothronychus live?

It lived during the Late Cretaceous period, about 94 to 89 million years ago.2

?Where was Nothronychus found?

Fossils have been found in New Mexico and Utah, USA.1 2

?Why did Nothronychus have long claws?

It used its long, curved claws to pull down branches so it could eat leaves.1

給恐龍專家

學名: Nothronychus
命名者: Kirkland and Wolfe 20014
類群: 奇特的羽毛恐龍
科 / 演化支: Therizinosauridae4
分類: Theropoda > Therizinosauria4
岩石的年代: 94 到 90 百萬年 (Turonian)4
岩層: Moreno Hill, Tropic Shale4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: Nothronychus was named in 2001 by paleontologists James Kirkland and Douglas Wolfe. The first fossils were found in New Mexico on land owned by rancher Bobby McKinley, who the species N. mckinleyi is named after.1
仍有爭議: Scientists are not sure if Nothronychus had feathers. Since it is a theropod closely related to birds, it might have had feathers, but no direct fossil evidence has been found yet.1