恐龍卡第 0573 張，共 2 027 張

Elaphrosaurus

名字的意思： “light-footed lizard”1

吃：每樣都來一點肉食恐龍侏羅紀晚期到白堊紀晚期

Elaphrosaurus was a long, slender dinosaur that ran fast on short legs. It lived in what is now Africa during the Late Jurassic Period, about 155 to 145 million years ago. Scientists think it might have eaten plants or small animals, not big prey.1

生存年代

155 到 94 百萬年前3

侏羅紀晚期到白堊紀晚期

化石發現地

Tendaguru Formation, Lindi Region, Tanzania1 2

長度

6 到 6.2 m (20 到 20 ft)1

體重

200 kg 到 210 kg (441 到 463 lb)1

高度

1.46 m (4.8 ft)1

最高速度

時速約 48 公里（30 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 10 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 34 根香蕉頭尾相接一樣長跟 42 顆西瓜一樣重跟 11 個幼兒園小朋友一樣重跟 7 個小學生一樣重能在 7.5 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Elaphrosaurus 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)

Elaphrosaurus 時速約 48 公里 (30 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

Elaphrosaurus had very short legs for its body length, which is unusual for a meat-eating dinosaur.1

Its shin bone was longer than its thigh bone, which helped it run fast.1

No skull of Elaphrosaurus has ever been found, so scientists are not sure what its head looked like.1

Elaphrosaurus had a long tail that bent downward at the tip, a rare feature among theropods.1

It was once thought to be an ornithomimid (ostrich dinosaur), but now scientists place it in the group Ceratosauria.1

Elaphrosaurus was about 6.2 metres (20 feet) long but only weighed around 200 kilograms (440 pounds), making it lightly built.1

Fossils of Elaphrosaurus have also been found in the Morrison Formation of the United States, but those are fragmentary.1

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

?How big was Elaphrosaurus?

About 6.2 metres (20 feet) long and 1.46 metres (4.8 feet) tall at the hip. It weighed around 200 to 210 kilograms (440 to 460 pounds).1

?What did Elaphrosaurus eat?

Scientists are not sure. It may have eaten plants or small animals, because its neck was not flexible enough to catch large prey.1

?Did Elaphrosaurus have feathers?

No fossil feathers have been found with Elaphrosaurus, so scientists do not know for sure. Many theropod dinosaurs are thought to have had feathers, but no direct evidence exists for this species.1

?How fast could Elaphrosaurus run?

Its long shin bone and light build suggest it was a fast runner, but no exact speed is known.1

?Is Elaphrosaurus a dinosaur?

Yes, it is a theropod dinosaur from the Late Jurassic period.1 2

?Where was Elaphrosaurus found?

Its fossils were discovered in Tanzania, Africa, in the Tendaguru Formation.1

迷思破解王

迷思： Elaphrosaurus was a fast predator that hunted large dinosaurs.

真相： Its short legs and inflexible neck suggest it could not catch big prey. It may have eaten small animals or plants instead.1

給恐龍專家

學名: Elaphrosaurus
命名者: Janensch 19203
類群: 肉食恐龍
科 / 演化支: Noasauridae3
分類: Theropoda > Ceratosauria3
岩石的年代: 155 到 94 百萬年 (Kimmeridgian / Cenomanian)3
岩層: Tendaguru, Morrison3
國家: 坦尚尼亞, 美國, 摩洛哥3
化石紀錄: The Paleobiology Database 收錄 4 筆3
發現: Elaphrosaurus was named by German paleontologist Werner Janensch in 1920. The first nearly complete skeleton was found in 1910 in Tanzania during an expedition to the Tendaguru Formation.1
仍有爭議: Scientists are still debating whether Elaphrosaurus was a carnivore, herbivore, or omnivore, because its skull is unknown and its neck was not built for hunting.1