恐龍卡第 1221 張，共 2 027 張

Mussaurus

名字的意思： “mouse lizard”1

吃：植物長脖子恐龍侏羅紀早期

Mussaurus was a long-necked dinosaur that lived in what is now Argentina. When it hatched, it was tiny, about the size of a mouse, but adults grew as long as a school bus!1

生存年代

200 到 193 百萬年前6

侏羅紀早期

化石發現地

Laguna Colorada Formation, Santa Cruz province, Patagonia, Argentina2 1

長度

0.2 到 8 m (0.7 到 26 ft)1 3

體重

0.053 kg 到 1.6 公噸 (0 到 3,500 lb)1

高度

2.1 m (6.9 ft)

估計值

最高速度

時速約 29 公里（18 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

牠有多重？

跟 1 台汽車一樣重

跟 8 隻狗從鼻子接到尾巴一樣長跟 44 根香蕉頭尾相接一樣長跟 80 隻狗一樣重跟 320 顆西瓜一樣重跟 84 個幼兒園小朋友一樣重跟 50 個小學生一樣重跟 4 隻北極熊一樣重能在 12 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Mussaurus 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)

Mussaurus 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

Mussaurus babies were only 20 cm (7.9 in) long and weighed about as much as a chicken egg.1 3

As it grew, Mussaurus changed from walking on all fours to walking on two legs.1

Scientists found over 100 eggs and 80 skeletons of Mussaurus together, showing they lived in herds.1

This dinosaur lived about 193 million years ago, during the Early Jurassic period.2

Adult Mussaurus could reach 8 metres (26 ft) long and weigh up to 1.6 metric tons (1.8 short tons).1

Mussaurus is one of the earliest dinosaurs known to have complex social behavior, like living in groups.1

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

?What did Mussaurus eat?

Mussaurus was an herbivore, meaning it ate plants. It had a long neck to reach leaves and ferns.1

?How big was a baby Mussaurus?

Baby Mussaurus were tiny, about 20 centimetres long and weighing as little as a chicken egg, around 53 to 77 grams.1

?Did Mussaurus live in herds?

Yes, Mussaurus is the earliest dinosaur known to have lived in herds. Scientists found over 100 eggs and 80 skeletons together, showing they lived in age-segregated groups.1 4 5

?How fast could Mussaurus run?

Nobody knows for sure, but since adults walked on two legs and were medium-sized, they could probably move at a moderate jogging speed.1

?When did Mussaurus live?

Mussaurus lived about 193 million years ago, during the Early Jurassic period.1 5

?Why is it called Mussaurus?

Mussaurus means 'mouse lizard' because the first fossils found were tiny babies, about the size of a mouse.1

迷思破解王

迷思： Mussaurus was always a tiny dinosaur.

真相： Only the babies were tiny. Adults grew to be huge, up to 8 metres long.1

給恐龍專家

學名: Mussaurus
命名者: Bonaparte and Vince 19796
類群: 長脖子恐龍
科 / 演化支: Sauropodiformes6
分類: Sauropodomorpha6
岩石的年代: 200 到 193 百萬年 (Sinemurian)6
岩層: Laguna Colorada6
國家: 阿根廷6
化石紀錄: The Paleobiology Database 收錄 2 筆6
發現: Mussaurus was named by Jose Bonaparte and Martin Vince in 1979. They found tiny skeletons and eggs in the Laguna Colorada Formation in Argentina.2 3
仍有爭議: Scientists are still debating whether Mussaurus is a direct ancestor of the giant sauropods.1