恐龍卡第 0238 張，共 2 027 張

Baptanodon

名字的意思： “toothless swimmer”1

吃：肉魚龍類侏羅紀中期到侏羅紀晚期嚴格來說不是恐龍

Baptanodon was a dolphin-shaped marine reptile that swam in the warm Jurassic seas. It had a long snout and big eyes to hunt squid and fish. Even though its name means 'toothless', scientists later found tiny teeth in its jaws.1 2

趣味小知識：這種海生爬蟲類在海裡游泳的時候，恐龍正在陸地上走路。大家都叫牠們恐龍，但牠們其實是爬蟲類的另一個分支。

生存年代

168 到 155 百萬年前3

侏羅紀中期到侏羅紀晚期

化石發現地

Wyoming, USA1 3

長度

3.5 m (11 ft)1

最高速度

時速約 48 公里（30 英里）

游泳, 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 4 隻狗從鼻子接到尾巴一樣長跟 19 根香蕉頭尾相接一樣長能在 3.8 秒內游完一座大泳池（50 公尺）

Baptanodon 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)

Baptanodon 時速約 48 公里 (30 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

Baptanodon lived about 160 to 156 million years ago, during the Late Jurassic period.1

Its body was shaped like a dolphin, about 3.5 metres (11 feet) long, and it used its tail to swim fast.1

For many years scientists thought Baptanodon had no teeth, but in 1902 Charles Gilmore found tiny teeth in its jaws.2

Baptanodon was first named Sauranodon in 1879, but that name was already used for another animal, so it was changed to Baptanodon in 1880.1

Fossils of Baptanodon come from the Sundance Formation in Wyoming, which was once a shallow sea.1

Baptanodon is part of the ophthalmosaurid family, a group of ichthyosaurs with very large eyes.1 3

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

?Was Baptanodon a dinosaur?

No, Baptanodon was an ichthyosaur, a marine reptile that lived in the sea, not a dinosaur.1

?How big was Baptanodon?

About 3.5 metres (11 feet) long, roughly the size of a small dolphin.1

?Did Baptanodon have teeth?

Yes, even though its name means 'toothless', scientists later discovered tiny teeth in its jaws in 1902.1 2

迷思破解王

迷思： Baptanodon had no teeth at all.

真相： Scientists originally thought it was toothless, but later discovered small teeth in its jaws.1 2

給恐龍專家

學名: Baptanodon
命名者: Seeley 18743
類群: 魚龍類
科 / 演化支: Ophthalmosauridae3
分類: Ichthyosauria > Ichthyosauromorpha3
岩石的年代: 168 到 155 百萬年 (Bathonian / Oxfordian)3
岩層: Sundance3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 2 筆3
又名: Sauranodon （舊名稱現在也算作同一種動物）3
發現: Baptanodon was first described by Othniel Charles Marsh in 1879 under the name Sauranodon. In 1880, Marsh renamed it Baptanodon because Sauranodon was already taken.1
仍有爭議: Scientists still debate whether Baptanodon is a separate genus from Ophthalmosaurus or just a species of that group.1