恐龍卡第 0170 張，共 2 027 張

Arkansaurus

名字的意思： “Arkansas lizard”1

Arkansaurus was a fast, ostrich-like dinosaur that lived in what is now Arkansas, USA, about 113 to 100 million years ago. It ran on two long legs and used its beak to eat plants, insects, and maybe even eggs.1 2

生存年代

113 到 100 百萬年前6

白堊紀早期

化石發現地

Lockesburg, Arkansas, USA1

長度

4.6 m (15 ft)1

體重

380.5 kg (839 lb)1

高度

1.8 到 4.6 m (5.9 到 15 ft)2

最高速度

時速約 58 公里（36 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？

牠有多重？

跟 19 隻狗一樣重

跟 5 隻狗從鼻子接到尾巴一樣長跟 26 根香蕉頭尾相接一樣長跟 76 顆西瓜一樣重跟 20 個幼兒園小朋友一樣重跟 12 個小學生一樣重高到能從 2 樓的窗戶往裡看能在 6.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Arkansaurus 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)

Arkansaurus 時速約 58 公里 (36 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

Arkansaurus is the only dinosaur fossil ever described from the state of Arkansas.1

Its foot bones show a greenstick fracture, which is the first time such a healed break has been found in a dinosaur fossil.1

The dinosaur was discovered in 1972 by Joe B. Friday on his farm, and it was named after him and the state.1

Arkansaurus was a basal ornithomimosaur, meaning it was an early relative of the ostrich-like dinosaurs, but not as advanced.1

It lived along the shoreline of a shallow sea that covered parts of North America during the Early Cretaceous.2

Scientists think Arkansaurus could run fast because its foot bones were long and slim, with three toes.2

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

?How big was Arkansaurus?

Arkansaurus was about 4.6 metres (15 feet) long and weighed around 380.5 kilograms (839 pounds).1

?Did Arkansaurus have feathers?

Yes, like other ornithomimosaurs, Arkansaurus had feathers instead of scales.4

?What did Arkansaurus eat?

Arkansaurus was an omnivore, eating plants, insects, and possibly eggs, using its beak-like mouth.5

?How fast could Arkansaurus run?

Arkansaurus was a very fast runner, with strong back legs and an ostrich-like build.4

?When did Arkansaurus live?

Arkansaurus lived during the Early Cretaceous period, about 113 to 100 million years ago.1 4

?Is Arkansaurus a dinosaur?

Yes, Arkansaurus is a dinosaur. It is an ornithomimosaurian theropod dinosaur.1

迷思破解王

迷思： Some people think Arkansaurus was a meat-eater like a raptor.

真相： It was actually an omnivore, eating plants, insects, and maybe eggs, based on its beak and toothless mouth.2

給恐龍專家

學名: Arkansaurus
命名者: Hunt and Quinn 20186
類群: 似鳥龍類
科 / 演化支: Ornithomimosauria6
分類: Theropoda > Ornithomimosauria6
岩石的年代: 113 到 100 百萬年 (Albian)6
國家: 美國6
化石紀錄: The Paleobiology Database 收錄 1 筆6
發現: The foot bones were found in August 1972 by Joe B. Friday in a gravel pit near Lockesburg, Arkansas. Dr. James Harrison Quinn studied them and named the dinosaur Arkansaurus fridayi, but he died before publishing. The name was officially published in 2018 by paleontologists ReBecca Hunt-Foster and James Harrison Quinn.1
仍有爭議: Scientists are not sure exactly what Arkansaurus looked like because only foot bones have been found. Its appearance is guessed from related dinosaurs.2