恐龍卡第 0408 張，共 2 027 張

Chirostenotes

名字的意思： “narrow-handed”1

吃：每樣都來一點奇特的羽毛恐龍白堊紀晚期

Chirostenotes was a small, bird-like dinosaur that lived in North America during the Late Cretaceous. It had long, slender fingers and a beak without teeth, and scientists think it ate both plants and small animals.1 2

生存年代

84 到 66 百萬年前4

白堊紀晚期

化石發現地

Canada (Alberta) and the United States (Montana, South Dakota, Texas)4 1

長度

1.7 m (5.6 ft)1

體重

100 kg (220 lb)3

高度

0.7 m (2.3 ft)

估計值

最高速度

時速約 48 公里（30 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 5 隻狗一樣重

跟 3 隻家貓從鼻子接到尾巴一樣長跟 9 根香蕉頭尾相接一樣長跟 20 顆西瓜一樣重跟 5 個幼兒園小朋友一樣重跟 3 個小學生一樣重能在 7.5 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Chirostenotes 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)

Chirostenotes 時速約 48 公里 (30 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

Chirostenotes belongs to a group called caenagnathids, which are oviraptorosaurs. These dinosaurs are known for their toothless beaks and often had crests on their heads.4 2

Its name means 'narrow-handed' because its hand bones were long and slender, with three fingers that ended in sharp claws.1

Chirostenotes lived between about 79 and 67 million years ago, during the Late Cretaceous period.1

Fossils of Chirostenotes have been found in the Dinosaur Park Formation in Alberta, Canada, and the Hell Creek Formation in Montana, USA.4

Scientists once thought Chirostenotes was a different dinosaur called Macrophalangia, which means 'big toes'. Now they know it's the same animal.4

A study of a well-preserved jaw showed that Chirostenotes had a strong, shearing bite, like some plant-eating animals today. This supports the idea that it ate tough plants.2

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

?How big was Chirostenotes?

About 2.5 metres (8.2 ft) long and weighed around 100 kg (220 lbs).3

?What did Chirostenotes eat?

It was an omnivore, eating both plants and small animals like grubs, amphibians, reptiles and mammals.3 2

?Did Chirostenotes have feathers?

Yes, it was a feathered theropod, and related oviraptorosaurs like Caudipteryx had large primary feathers on their hands.3

?When did Chirostenotes live?

It lived during the Late Cretaceous period, about 79 to 67 million years ago.1

?Where was Chirostenotes found?

Fossils have been found in Alberta, Canada, and Montana, USA.1 3

?Why is it called Chirostenotes?

Its name means 'narrow-handed' because its hand bones were long and slender.1

迷思破解王

迷思： Some people think Chirostenotes was a meat-eater like many other theropods.

真相： Chirostenotes was actually an omnivore, eating both plants and small animals. Its toothless beak and jaw shape are better suited for slicing plants than for catching large prey.2

給恐龍專家

學名: Chirostenotes
命名者: Gilmore 19244
類群: 奇特的羽毛恐龍
科 / 演化支: Caenagnathidae4
分類: Theropoda > Oviraptorosauria4
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)4
岩層: Hell Creek, Dinosaur Park, Aguja4
國家: 美國, 加拿大4
化石紀錄: The Paleobiology Database 收錄 28 筆4
又名: Macrophalangia （舊名稱現在也算作同一種動物）4
發現: Chirostenotes was named in 1924 by paleontologist Charles W. Gilmore, based on a pair of hands found in Alberta, Canada. Later, more complete fossils showed it was a caenagnathid.4 1
仍有爭議: Scientists are still debating exactly what Chirostenotes ate. Some think it was mostly a plant-eater, while others believe it ate a mix of plants and small animals.2