恐龍卡第 1339 張，共 2 027 張

Pachagnathus

名字的意思： “earth jaw”1

吃：魚飛行爬蟲類三疊紀晚期嚴格來說不是恐龍

Pachagnathus was a flying reptile that lived in what is now Argentina during the Late Triassic. It is one of the first pterosaurs ever found in the southern half of the world.1 2

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

227 到 206 百萬年前3

三疊紀晚期

化石發現地

Quebrada del Puma locality, Quebrada del Barro Formation, San Juan Province, Argentina1 3

最高速度

時速約 52 公里（32 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)

Pachagnathus 時速約 52 公里 (32 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

Pachagnathus is known only from a piece of its lower jaw, which is 61.5 mm long and very narrow.1

Its lower jaw has a strange ridge that switches between a single line and a pair of lines between the teeth. No other pterosaur has this.1

Pachagnathus lived far from the coast, in a dry inland area. Most early pterosaurs lived near the sea.1

It was named in 2022, making it a very recently discovered pterosaur.1

Pachagnathus and its relative Yelaphomte are the only definite Triassic pterosaurs from the southern hemisphere.1 2

Pachagnathus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Pachagnathus 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: Pachagnathus
命名者: Martínez et al. 20223
類群: 飛行爬蟲類
科 / 演化支: Raeticodactylidae3
分類: Pterosauria3
岩石的年代: 227 到 206 百萬年 (Norian)3
岩層: Quebrada del Barro3
國家: 阿根廷3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Pachagnathus was named in 2022 by Ricardo N. Martínez and colleagues. The only fossil, a piece of lower jaw, was found between 2012 and 2014 in Argentina.1
仍有爭議: Scientists are not sure how big Pachagnathus was, because only a small piece of its jaw has been found.1