恐龍卡第 1352 張，共 2 027 張

Palmulasaurus

名字的意思： “little palm lizard”1

吃：肉蛇頸龍類白堊紀晚期嚴格來說不是恐龍

Palmulasaurus was a fast-swimming marine reptile that lived in the warm seas of Utah about 93 million years ago. It had a long neck and four flippers to paddle through the water. Even though it looked like a dinosaur, it was actually a plesiosaur, a different kind of ancient reptile.1 3

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

94 到 90 百萬年前3

白堊紀晚期

化石發現地

Utah, USA3 1

長度

3 到 4 m (9.8 到 13 ft)1

最高速度

時速約 29 公里（18 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 22 根香蕉頭尾相接一樣長能在 6.2 秒內游完一座大泳池（50 公尺）

Palmulasaurus 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)

Palmulasaurus 時速約 29 公里 (18 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

Palmulasaurus was first called Palmula, but that name was already used for a tiny fossil shell. Scientists had to give it a new name.1

It lived during the Turonian stage, about 94 to 89 million years ago.1 3

Palmulasaurus belonged to a group of plesiosaurs called polycotylids, which had short necks and were fast swimmers.1

Its fossils were found in the Tropic Shale in Utah, which was once a warm, shallow sea.1 3

Palmulasaurus gave birth to live young, not eggs, like many other marine reptiles.2

Palmulasaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Palmulasaurus 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: Palmulasaurus
命名者: Albright et al. 20073
類群: 蛇頸龍類
科 / 演化支: Polycotylidae3
分類: Plesiosauria > Sauropterygia3
岩石的年代: 94 到 90 百萬年 (Turonian)3
岩層: Tropic Shale3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Palmulasaurus was named by L. B. Albright, D. D. Gillette, and A. L. Titus in 2007. They originally called it Palmula, but that name was already taken by a foraminiferan, so they changed it to Palmulasaurus.1 3
仍有爭議: Scientists are not sure exactly how big Palmulasaurus grew, because only a few fossils have been found.1