恐龍卡第 0830 張，共 2 027 張

Huaxiagnathus

名字的意思： “China jaw”1

吃：肉肉食恐龍白堊紀早期

Huaxiagnathus was a fast, meat-eating dinosaur that lived in what is now China. It was one of the biggest theropods found in the Jehol Group, almost twice as big as most other predators from that time and place.1

生存年代

126 到 120 百萬年前4

白堊紀早期

化石發現地

Yixian Formation, Liaoning Province, China2 3

長度

1.6 m (5.2 ft)1

高度

0.56 m (1.8 ft)

估計值

最高速度

時速約 36 公里（22 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

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能在 10 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Huaxiagnathus 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)

Huaxiagnathus 時速約 36 公里 (22 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

Huaxiagnathus belonged to a group of small, quick dinosaurs called compsognathids. It was one of the largest compsognathids ever found.1

Scientists think Huaxiagnathus might actually be a young version of the bigger tyrannosauroid Sinotyrannus. If so, Huaxiagnathus would be the correct name because it was named first.2

The holotype skeleton is almost complete, missing only the tip of the tail. It is preserved on five large stone slabs.2 1

Huaxiagnathus lived about 125 million years ago, during the Early Cretaceous period.2 3

Like all compsognathids, Huaxiagnathus had short forelimbs and a fairly simple body plan for a coelurosaur.1

Two specimens of Huaxiagnathus are known, both immature individuals. The larger one was damaged during preparation and could not be used as the main example.2

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

?How big was Huaxiagnathus?

About 1.8 metres long, which is larger than many other Jehol theropods and other compsognathids.2 1

?What did Huaxiagnathus eat?

It was a meat-eater. Partially digested bones of an unidentified vertebrate were found inside the holotype specimen.2

?When did Huaxiagnathus live?

It lived about 125 million years ago, during the Early Cretaceous period.2 1

?Is Huaxiagnathus a dinosaur?

Yes, it is a coelurosaurian theropod dinosaur.2 4

給恐龍專家

學名: Huaxiagnathus
命名者: Hwang et al. 20044
類群: 肉食恐龍
科 / 演化支: Compsognathidae4
分類: Theropoda > Compsognathidae4
岩石的年代: 126 到 120 百萬年 (Barremian / Aptian)4
岩層: Yixian4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Huaxiagnathus was named in 2004 by Sunny H. Hwang, Mark A. Norell, Ji Qiang and Gao Keqin. The first skeleton was found by farmers near Dabangou Village, Liaoning, China.1 2
仍有爭議: Scientists are not sure if Huaxiagnathus is really a compsognathid or a young tyrannosauroid. More fossils might solve this debate.2