恐龍卡第 1213 張，共 2 027 張

Morrosaurus

名字的意思： “Morro lizard, named after El Morro, the place where it was found”1

吃：植物有喙的草食恐龍白堊紀晚期

Morrosaurus was a plant-eating dinosaur that lived in Antarctica during the Late Cretaceous, about 72 to 66 million years ago. It was a medium-sized runner with long, slender legs, and it lived in a cool, rainy forest.1 2

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

James Ross Island, Antarctica1 3

長度

4.5 到 5 m (15 到 16 ft)1

高度

1.5 m (4.9 ft)

估計值

最高速度

時速約 39 公里（24 英里）

跑步, 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？

牠有多高？

估計值

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 9.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Morrosaurus 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)

Morrosaurus 時速約 39 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

Morrosaurus is one of the few dinosaurs known from Antarctica, showing that dinosaurs lived on every continent.1

Its leg bones suggest it was a fast runner, with a slender, tightly bunched foot that helped it sprint.1 3

Morrosaurus belonged to a group called Elasmaria, which also included dinosaurs from Patagonia and Australia, showing they shared a common land connection.3

The only known fossil is a partial right hind leg, including parts of the thigh, shin, and foot.1

It lived in a cool, temperate rainforest with high rainfall, very different from the icy Antarctica we know today.3

Morrosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Morrosaurus 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： Some people think dinosaurs never lived in Antarctica because it is too cold.

真相： Morrosaurus and other dinosaurs lived in Antarctica when it was warmer and covered in forests, during the Late Cretaceous.1 3

給恐龍專家

學名: Morrosaurus
命名者: Rozadilla et al. 20164
類群: 有喙的草食恐龍
科 / 演化支: Elasmaria4
分類: Ornithischia > Ornithopoda > Iguanodontia4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Snow Hill Island4
國家: 南極洲4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The fossil was found in 2002 by Argentine paleontologist Fernando Novas, and the species was named Morrosaurus antarcticus in 2016 by Rozadilla and colleagues.1
仍有爭議: Scientists are still debating exactly how Morrosaurus and other southern dinosaurs are related to each other, and whether they formed a single group called Elasmaria.3