恐龍卡第 0760 張，共 2 027 張

Guaibasaurus

名字的意思： “Guaíba lizard”1

吃：植物長脖子恐龍三疊紀晚期

Guaibasaurus was one of the earliest plant-eating dinosaurs. It lived in what is now Brazil during the Late Triassic, around 225 million years ago. This small dinosaur had a long neck and may have walked on two legs or four.3 2 1

生存年代

227 到 206 百萬年前3

三疊紀晚期

化石發現地

Rio Grande do Sul, southern Brazil2 1

長度

2 到 3 m (6.6 到 9.8 ft)2

體重

10 kg 到 35 kg (22 到 77 lb)2

高度

0.91 m (3 ft)

估計值

最高速度

時速約 34 公里（21 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 9 隻家貓一樣重

跟 3 隻狗從鼻子接到尾巴一樣長跟 17 根香蕉頭尾相接一樣長跟 7 顆西瓜一樣重能在 11 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Guaibasaurus 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)

Guaibasaurus 時速約 34 公里 (21 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

Guaibasaurus fossils have been found in a sleeping posture, with legs tucked under the body and arms bent to the side, similar to modern birds.2

This dinosaur lived about 225.42 million years ago, based on uranium-lead dating of the rocks where its fossils were found.2

Scientists are not sure if Guaibasaurus was an early theropod or an early sauropodomorph. Most studies place it among the sauropodomorphs.2 1

The name Guaibasaurus comes from the Rio Guaíba basin in Brazil, where the first fossil was discovered during a scientific project.2 1

Only one species of Guaibasaurus is known, called Guaibasaurus candelariensis. The species name honors the nearby city of Candelária.2

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

?How big was Guaibasaurus?

Scientists give different estimates. Gregory S. Paul said it was about 2 metres long (6.6 ft) and weighed 10 kg (22 lbs), while Molina-Pérez and Larramendi said it was about 3 metres long (10 ft) and 35 kg (77 lbs).2

?What did Guaibasaurus eat?

It was a plant-eater, or herbivore.1

?When did Guaibasaurus live?

It lived during the Late Triassic Period, about 225.42 million years ago.2

?Why did Guaibasaurus sleep like a bird?

One fossil was found with its legs tucked under its body and arms bent to the side, just like resting birds. Scientists think it may have slept this way to keep warm.2

給恐龍專家

學名: Guaibasaurus
命名者: Bonaparte et al. 19993
類群: 長脖子恐龍
科 / 演化支: Guaibasauridae3
分類: Sauropodomorpha3
岩石的年代: 227 到 206 百萬年 (Norian)3
岩層: Caturrita3
國家: 巴西3
化石紀錄: The Paleobiology Database 收錄 3 筆3
發現: Guaibasaurus was named in 1999 by paleontologists José F. Bonaparte, Jorge Ferigolo, and Ana Maria Ribeiro. They described it based on a partial skeleton found in the Caturrita Formation of Brazil.2 1 3
仍有爭議: Scientists still debate whether Guaibasaurus was a very early sauropodomorph or a primitive theropod. Its exact place on the dinosaur family tree is not settled.2 1