恐龍卡第 0751 張，共 2 027 張

Gravisaurus

名字的意思： “heavy lizard”1

吃：植物有喙的草食恐龍白堊紀早期

Gravisaurus was a heavy, plant-eating dinosaur that lived in what is now Niger, Africa, about 112 million years ago. It had a small head, a long neck, a round body, and strong front legs with big claws. Scientists think it moved slowly and may have looked a bit like a giant ground sloth.1

生存年代

113 到 100 百萬年前4

白堊紀早期

長度

7 到 9 m (23 到 30 ft)1

體重

2.5 公噸到 5.5 公噸 (5,500 到 12,100 lb)1

高度

2 m (6.6 ft)1

最高速度

時速約 23 公里（14 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 4 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長大約跟一頭大象一樣重跟 1100 顆西瓜一樣重跟 7 整班小學生一樣重跟 12 隻北極熊一樣重能在 16 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Gravisaurus 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)

Gravisaurus 時速約 23 公里 (14 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

Gravisaurus was first described in 1988 by paleontologist Souad Chabli in her PhD thesis, but the name was not officially published until 1999.2 1

Its thumb spike was huge, much bigger than in other iguanodonts.1

Gravisaurus may have been the first ornithischian dinosaur with graviportal anatomy, meaning its legs were built to support a very heavy body.1

Its stomach was only about 70 centimetres (2 feet 4 inches) off the ground when it stood on all fours.1

Gravisaurus lived in a forested river environment alongside other dinosaurs like Ouranosaurus, Nigersaurus, and the giant crocodile Sarcosuchus.1

Some scientists think Gravisaurus behaved like a hippopotamus, spending time in water and moving slowly on land.1

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

?How big was Gravisaurus?

Gravisaurus was about 7 to 9 metres (23 to 30 feet) long and 2 metres (6.6 feet) tall on all fours. It weighed between 2.5 and 5.5 tonnes (2.8 to 6.1 short tons), which is as heavy as a large hippo.3

?What did Gravisaurus eat?

Gravisaurus was a plant-eater. It lived in a forested area with soft plants like ferns and horsetails, which it likely ate.3

?Did Gravisaurus have any predators?

Yes, Gravisaurus lived alongside big meat-eaters like the spinosaurid Suchomimus and the carcharodontosaurid Eocarcharia. Its huge thumb spike was probably used for defense.3

?Could Gravisaurus swim?

Some scientists think Gravisaurus may have behaved like a hippo, spending time in water. Its heavy body and strong legs suggest it could move in rivers, but nobody knows for sure if it swam.3

?Why did Gravisaurus have a thumb spike?

Gravisaurus had a massive thumb spike that scientists think was used for defense against predators.3

?Is Gravisaurus a dinosaur?

Yes, Gravisaurus is a dinosaur. It is a type of iguanodont ornithischian dinosaur from the Early Cretaceous period.3

給恐龍專家

學名: Gravisaurus
命名者: Chabli 19884
類群: 有喙的草食恐龍
科 / 演化支: Iguanodontoidea4
分類: Ornithischia > Ornithopoda > Iguanodontia4
岩石的年代: 113 到 100 百萬年 (Albian)4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The first skeleton of Gravisaurus was found in 1965 by French paleontologist Philippe Taquet in the Tenere desert of Niger. It was named Gravisaurus tenerensis by Souad Chabli in 1988, but later renamed Lurdusaurus arenatus in 1999.1 2
仍有爭議: Scientists disagree on how heavy Gravisaurus was. One estimate says about 5.5 tonnes, while another says only 2.5 tonnes.1