恐龍卡第 0426 張，共 2 027 張

Citipes

名字的意思： “fleet-footed”1

吃：每樣都來一點奇特的羽毛恐龍白堊紀晚期

Citipes was a small, fast-running dinosaur that lived in what is now Canada and the USA. It had a beak like a parrot and probably ate plants and small animals. Scientists think it was covered in feathers.1

生存年代

84 到 66 百萬年前3

白堊紀晚期

化石發現地

Alberta, Canada and Montana, USA3

長度

1.5 到 2.5 m (4.9 到 8.2 ft)1

體重

10 kg 到 20 kg (22 到 44 lb)1

高度

0.5 到 0.8 m (1.6 到 2.6 ft)1

最高速度

時速約 38 公里（24 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 5 隻家貓一樣重

跟 2.5 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長跟 4 顆西瓜一樣重能在 9.5 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Citipes 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)

Citipes 時速約 38 公里 (24 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

Citipes was named in 2020, but its fossils were first discovered in 1926 and were thought to belong to other dinosaurs like Ornithomimus.1

A fossil of a young Gorgosaurus was found with the legs of at least two Citipes inside its stomach, showing that Citipes was hunted by this larger dinosaur.1

The Citipes legs inside the Gorgosaurus were from babies less than one year old, and the Gorgosaurus seemed to prefer eating the muscular hind legs.1

Citipes had a fused ankle and strong leg muscles, which made it a very fast runner.1

One Citipes fossil shows a broken hip bone that had healed, meaning the animal survived a serious injury.1

Citipes lived alongside two other similar dinosaurs, Caenagnathus and Chirostenotes, but they were different sizes and probably ate different foods to avoid competing.1

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

?How big was Citipes?

Citipes was a small dinosaur, roughly the size of an emu when fully grown. The juveniles found in the Gorgosaurus stomach were about the size of a turkey.2

?What did Citipes eat?

Citipes probably ate plants and small animals, since it had a beak like a parrot. It lived alongside two similar dinosaurs that ate different foods to avoid competing.1

?Did Citipes have feathers?

Yes, scientists think Citipes was covered in feathers, like many other bird-like dinosaurs. It was a caenagnathid, a type of feathered theropod.1

?Was Citipes hunted by other dinosaurs?

Yes, a fossil of a young Gorgosaurus was found with the legs of at least two Citipes inside its stomach, showing that Gorgosaurus hunted Citipes.1 2

迷思破解王

迷思： Citipes is often confused with the dinosaur Citipati, which has a similar name.

真相： Citipes and Citipati are different dinosaurs. Citipati is an oviraptorid from Mongolia, while Citipes is a caenagnathid from North America.1

給恐龍專家

學名: Citipes
命名者: Funston 20203
類群: 奇特的羽毛恐龍
科 / 演化支: Caenagnathidae3
分類: Theropoda > Oviraptorosauria3
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)3
岩層: Dinosaur Park, Hell Creek3
國家: 加拿大, 美國3
化石紀錄: The Paleobiology Database 收錄 12 筆3
發現: The first Citipes fossils were found in 1926 in Alberta, Canada, by a University of Toronto expedition. They were named Ornithomimus elegans by William Parks in 1933, but later moved to their own genus Citipes by Gregory Funston in 2020.1
仍有爭議: Scientists are not sure exactly what Citipes ate. It had a beak but no teeth, so it may have eaten plants, small animals, or both.1