恐龍卡第 0229 張，共 2 027 張

Balaenognathus

名字的意思： “whale jaw”1

吃：魚飛行爬蟲類侏羅紀晚期嚴格來說不是恐龍

Balaenognathus was a flying reptile that lived about 150 million years ago. It had a strange, spoon-shaped snout with hundreds of tiny hooked teeth. It used its beak like a strainer to scoop up tiny shrimp from the water, just like a modern flamingo.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

152 到 149 百萬年前6

侏羅紀晚期

化石發現地

Bavaria, Germany3 1

長度

1 m (3.3 ft)2

翼展

1.17 m (3.8 ft)1 4

最高速度

時速約 38 公里（24 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？

牠有多長？

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能在 9.9 秒內飛越一整座足球場

Balaenognathus 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)

Balaenognathus 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

Balaenognathus had at least 480 teeth, more than most other pterosaurs.1

The tips of its teeth had tiny hooks, which have never been seen in any other pterosaur. These hooks helped trap shrimp so they couldn't escape.1 2

The front of its snout was shaped like a spatula and had no teeth, so water could flow in easily.1

Its upper jaw was more curved than its lower jaw, so its mouth stayed slightly open at the front even when closed.1

The fossil was found by accident in a quarry in Germany, inside a block of stone that also contained bones of a crocodile-like animal.1 2

Balaenognathus lived during the Late Jurassic period, about 152 to 149 million years ago.3

It had long legs, which helped it wade through shallow seas while feeding.2

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

?What did Balaenognathus eat?

It ate tiny shrimp and other small plankton. It used its spoon-shaped beak and hundreds of tiny hooked teeth to strain them out of the water.1 2

?How big was Balaenognathus?

It was a medium-sized pterosaur with a wingspan of 1.17 metres (3.8 feet). Its body was about 1 metre long.5

?Why did Balaenognathus have so many teeth?

Balaenognathus had over 480 long, slender teeth with tiny hooks at the tips. These teeth formed a fine mesh like a net to trap tiny shrimp while letting water escape.1 2

給恐龍專家

學名: Balaenognathus
命名者: Martill et al. 20236
類群: 飛行爬蟲類
科 / 演化支: Ctenochasmatidae6
分類: Pterosauria > Pterodactyloidea6
岩石的年代: 152 到 149 百萬年 (Kimmeridgian)6
國家: 德國6
化石紀錄: The Paleobiology Database 收錄 1 筆6
發現: Balaenognathus was named by David Martill and colleagues in 2023. The only known fossil was found in September 2011 in a quarry near Wattendorf, Bavaria, Germany, by workers collecting a block of limestone.1
仍有爭議: Scientists are not sure exactly how Balaenognathus used its hooked teeth and spatula-like snout to filter food, but they think it may have pumped water in and out by moving its long neck.1