恐龍卡第 1216 張，共 2 027 張

Muiscasaurus

名字的意思： “Muisca lizard (named after the Muisca people of Colombia)”1

吃：肉魚龍類白堊紀早期嚴格來說不是恐龍

Muiscasaurus was a swimming reptile that lived in the ocean during the time of the dinosaurs. It had a sleek body and flippers like a sea turtle. It hunted small, soft animals in the warm Cretaceous seas.2 1

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

126 到 113 百萬年前4

白堊紀早期

化石發現地

Boyacá, Colombia, in the Paja Formation2 1 3

長度

3 到 5 m (9.8 到 16 ft)1

最高速度

時速約 46 公里（29 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 5 隻狗從鼻子接到尾巴一樣長跟 28 根香蕉頭尾相接一樣長能在 3.9 秒內游完一座大泳池（50 公尺）

Muiscasaurus 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)

Muiscasaurus 時速約 46 公里 (29 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

Muiscasaurus had a very narrow skull and long, thin jaws, like a modern dolphin's snout.1

Its teeth were small and smooth, not ridged like those of its relative Kyhytysuka.1

The only known skeleton belongs to a young animal, because its backbone bones were not fully hardened.1

It lived about 125 to 113 million years ago, during the Early Cretaceous.2

Muiscasaurus is a type of ichthyosaur called an ophthalmosaurid, related to Ophthalmosaurus.1 3

A well-preserved skull and near-complete spine (68 vertebrae) was found in 2006, giving scientists a much clearer picture of Muiscasaurus.3

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

迷思破解王

迷思： Muiscasaurus was a dinosaur.

真相： It was an ichthyosaur, a marine reptile that swam in the ocean, not a dinosaur. Dinosaurs lived on land.2

給恐龍專家

學名: Muiscasaurus
命名者: Maxwell et al. 20154
類群: 魚龍類
科 / 演化支: Ophthalmosauridae4
分類: Ichthyosauria > Ichthyosauromorpha4
岩石的年代: 126 到 113 百萬年 (Barremian / Aptian)4
岩層: Paja4
國家: 哥倫比亞4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: The first fossil, a partial skull and skeleton, was described in 2015 and named Muiscasaurus catheti by Maxwell, Dick, Padilla and Parra.2 1
仍有爭議: Scientists are not sure exactly how big adult Muiscasaurus grew, because the only known fossils are from a juvenile and a sub-adult.1