恐龍卡第 1319 張，共 2 027 張

Orientognathus

名字的意思： “eastern jaw”1

吃：魚飛行爬蟲類白堊紀早期嚴格來說不是恐龍

Orientognathus was a flying reptile that lived in what is now China during the Late Jurassic. It had a long tail and a mouth full of sharp teeth, perfect for catching fish. It was one of the largest pterosaurs of its kind in that region.2 1

趣味小知識：翼龍在恐龍頭上飛來飛去，但牠們是恐龍的親戚，不是恐龍喔。

生存年代

143 到 137 百萬年前3

白堊紀早期

化石發現地

Chaoyang, Liaoning Province, China2 1

翼展

1.1 m (3.6 ft)3

最高速度

時速約 37 公里（23 英里）

飛行, 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？

牠的翅膀有多寬？

跟 2 隻家貓從鼻子接到尾巴一樣長能在 10 秒內飛越一整座足球場

Orientognathus 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)

Orientognathus 時速約 37 公里 (23 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

Orientognathus is the largest rhamphorhynchine pterosaur found in the Upper Jurassic rocks of northeastern China.2

Its lower jaw tip was toothless and slightly pointed, unlike many other pterosaurs.2

The length of its wing metacarpal (hand bone) was only 38 percent of the length of its upper arm bone, a short ratio compared to other pterosaurs.2

Orientognathus had straight teeth, while some related pterosaurs like Fenghuangopterus had curved teeth.2

It lived about 155 million years ago, during the Late Jurassic, and is perhaps the youngest Jurassic pterosaur from western Liaoning, China.1 2

Orientognathus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Orientognathus 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。

給恐龍專家

學名: Orientognathus
命名者: Lu et al. 20153
類群: 飛行爬蟲類
科 / 演化支: Rhamphorhynchidae3
分類: Pterosauria > Rhamphorhynchidae3
岩石的年代: 143 到 137 百萬年 (Berriasian)3
岩層: Tuchengzi3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Orientognathus was named and described in 2015 by Lü Junchang and colleagues, based on an incomplete skeleton found in the Tuchengzi Formation of Chaoyang, Liaoning, China.2 1
仍有爭議: Scientists are not sure whether Orientognathus belongs to the subfamily Rhamphorhynchinae or is a more basal rhamphorhynchid, because the fossil is incomplete.2 1