恐龍卡第 1021 張，共 2 027 張

Leaellynasaura

名字的意思： “Leaellyn's lizard”1

吃：植物有喙的草食恐龍白堊紀早期

Leaellynasaura was a tiny plant-eating dinosaur that lived in the dark polar forests of ancient Australia. It had big eyes to see in the long winter nights and a super long tail.2 1

生存年代

113 到 110 百萬年前5

白堊紀早期

化石發現地

Dinosaur Cove on the coast of Victoria, Australia (Eumeralla Formation)2 5

長度

1 到 1.8 m (3.3 到 5.9 ft)2 1

體重

4 kg (9 lb)3

高度

0.3 m (1 ft)3

最高速度

時速約 26 公里（16 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？

牠有多重？

跟 1 隻家貓一樣重

跟 4 隻家貓從鼻子接到尾巴一樣長跟 10 根香蕉頭尾相接一樣長大約跟一隻家貓一樣重跟 33 根香蕉一樣重小到能從椅子底下走過去能在 14 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Leaellynasaura 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)

Leaellynasaura 時速約 26 公里 (16 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

Leaellynasaura lived inside the Antarctic Circle during the Early Cretaceous, about 118 to 110 million years ago, when the climate was warmer than today.1

Its tail was extremely long, about three times the length of the rest of its body, and had more tail bones than most other plant-eating dinosaurs.1

It had enlarged eye sockets and large optic lobes in its brain, which helped it see in the dim light of polar winters.2 1

Bone growth lines show that Leaellynasaura grew continuously all year, meaning it did not hibernate or slow down much during the cold, dark winter.2

It may have lived in small herds or flocks, and dinosaur burrows found in Victoria suggest some small ornithopods might have sheltered underground in the coldest months.2

Its teeth had five ridges on each side, fewer than other small Victorian ornithopods like Qantassaurus and Atlascopcosaurus, which had at least eight.2

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

?How big was Leaellynasaura?

About 1.8 metres (6 feet) long including its tail, but some estimates based on a juvenile specimen suggest about 1 metre (3.3 feet).1 2

?What did Leaellynasaura eat?

It was a plant-eater that ate low-growing plants like horsetails, cycads, and ferns.1 2

?Did Leaellynasaura have feathers?

Scientists think it might have had hair-like filaments on its skin, but no feathers have been found yet.4

?Where was Leaellynasaura found?

It was discovered in Dinosaur Cove, Victoria, Australia, in rocks that were once inside the Antarctic Circle.1 2

?How fast could Leaellynasaura run?

Nobody knows for sure, but as a small, lightweight dinosaur it was probably quick and agile.1

?Why did Leaellynasaura have big eyes?

Its large eyes and brain areas for vision helped it see in the dim light of polar winters, though some scientists think it was just a young dinosaur.1 2

迷思破解王

迷思： Leaellynasaura was a hypsilophodontid, a type of small ornithopod.

真相： Scientists now think it may belong to a group called Elasmaria, but its exact place among ornithopods is still debated.2 1

給恐龍專家

學名: Leaellynasaura
命名者: Rich and Vickers-Rich 19895
類群: 有喙的草食恐龍
科 / 演化支: Elasmaria5
分類: Ornithischia > Ornithopoda > Iguanodontia5
岩石的年代: 113 到 110 百萬年 (Albian)5
岩層: Eumeralla5
國家: 澳洲5
化石紀錄: The Paleobiology Database 收錄 4 筆5
發現: Leaellynasaura was discovered in Dinosaur Cove, Australia, and named in 1989 by Tom Rich and Patricia Vickers-Rich. They named it after their daughter Leaellyn.1 5
仍有爭議: Scientists are not sure which fossils belong to Leaellynasaura, because most were found scattered, and some long-tailed skeletons may belong to a different dinosaur.1