恐龍卡第 0896 張，共 2 027 張

Jaculinykus

名字的意思： “speedy dragon”1

吃：肉奇特的羽毛恐龍白堊紀晚期

Jaculinykus was a tiny, bird-like dinosaur that lived in the Gobi Desert. It had a big claw on its thumb and could probably run very fast. One fossil was found curled up like a sleeping bird!1 2

生存年代

84 到 72 百萬年前5

白堊紀晚期

化石發現地

Nemegt locality, Ömnögovi Province, Mongolia1 5

長度

0.5 到 1 m (1.6 到 3.3 ft)1

體重

2 kg 到 5 kg (4 到 11 lb)1

高度

0.3 到 0.5 m (1 到 1.6 ft)1

最高速度

時速約 30 公里（19 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 1 隻家貓一樣重

跟 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長大約跟一隻家貓一樣重跟 42 根香蕉一樣重能在 12 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Jaculinykus 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)

Jaculinykus 時速約 30 公里 (19 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

Jaculinykus had only two fingers on each hand. Its first finger was huge with a big claw, and its second finger was tiny.1 2

The fossil of Jaculinykus was found in a sleeping position. Its neck was curled back and its legs were tucked under its body, just like modern birds.1 2

Jaculinykus is the ninth alvarezsaurid dinosaur discovered in the Nemegt Basin of Mongolia.1 2

Its name means 'speedy dragon' in a mix of Greek and Mongolian. 'Yaruui' means 'speedy' in Mongolian.1

Jaculinykus lived about 83 to 72 million years ago during the Late Cretaceous period.5

This dinosaur was a maniraptoran theropod, meaning it was more closely related to birds than to other dinosaurs like T. rex.1 2

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

?How big was Jaculinykus?

Jaculinykus was a tiny dinosaur, about the size of a modern turkey or a large chicken. Its nearly complete skeleton is small and delicate.1 3

?What did Jaculinykus eat?

Jaculinykus probably ate insects. It had a big thumb claw that it used to dig into insect nests, and its flexible skull may have helped it eat larger, struggling bugs.4

?Did Jaculinykus have feathers?

Yes, Jaculinykus was a feathered dinosaur. It was a maniraptoran theropod, a group that includes birds, and scientists think it was covered in feathers.4

?Why did Jaculinykus have a big thumb?

Jaculinykus had a big thumb with a large claw to help it dig for food, probably insects. The thumb was huge while the other fingers were tiny or missing.4 1

迷思破解王

迷思： Some people think all dinosaurs slept standing up.

真相： Jaculinykus shows that some dinosaurs slept curled up like birds, with their heads tucked under their arms.1 2

給恐龍專家

學名: Jaculinykus
命名者: Kubo et al. 20235
類群: 奇特的羽毛恐龍
科 / 演化支: Alvarezsauridae5
分類: Theropoda > Alvarezsauridae5
岩石的年代: 84 到 72 百萬年 (Campanian)5
岩層: Baruungoyot5
國家: 蒙古5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Jaculinykus was named in 2023 by a team of scientists including K. Kubo, Y. Kobayashi, T. Chinzorig, and K. Tsogtbaatar. The nearly complete skeleton was found in the Baruungoyot Formation of Mongolia.1 5
仍有爭議: Scientists are still debating exactly how Jaculinykus used its big thumb claw. It might have been for digging for insects or for tearing open logs.1 2