恐龍卡第 1558 張，共 2 027 張

Rocasaurus

名字的意思： “General Roca lizard”1

吃：植物長脖子恐龍白堊紀晚期

Rocasaurus was a small, plant-eating sauropod that lived in what is now Argentina. It had a long neck and tail, and its bones were full of air spaces, making it lighter than it looked.1

生存年代

72 到 66 百萬年前5

白堊紀晚期

化石發現地

Río Negro Province, Argentina1 2

長度

8 m (26 ft)1

高度

2.1 m (6.9 ft)

估計值

最高速度

時速約 27 公里（17 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

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能在 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Rocasaurus 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)

Rocasaurus 時速約 27 公里 (17 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

Rocasaurus was one of the smaller sauropods, only about 8 metres (26 feet) long.1

Its skeleton was highly pneumatic, meaning it had many air spaces in its bones, like modern birds.1

Rocasaurus lived during the Late Cretaceous, about 75 to 66 million years ago.1

It is closely related to other saltasaurid dinosaurs such as Saltasaurus and Neuquensaurus.1

The first fossils of Rocasaurus were found between 1989 and 1994 by scientists from the National University of Comahue.1

The species name muniozi honors Juan Carlos Muñoz, a paleontology director who supported research in the region.1

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

?How big was Rocasaurus?

About 8 metres (26 feet) long. That made it one of the smaller sauropods.4

?What did Rocasaurus eat?

It was a plant-eater, or herbivore. It used its long neck to reach leaves and other plants.4 5

?When did Rocasaurus live?

It lived during the Late Cretaceous, about 75 to 70 million years ago.4

?Where was Rocasaurus found?

Its fossils were found in Argentina, near the city of General Roca in Río Negro Province.4

給恐龍專家

學名: Rocasaurus
命名者: Salgado and Azpilicueta 20005
類群: 長脖子恐龍
科 / 演化支: Saltasauridae5
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria5
岩石的年代: 72 到 66 百萬年 (Maastrichtian)5
岩層: Allen5
國家: 阿根廷5
化石紀錄: The Paleobiology Database 收錄 4 筆5
發現: Rocasaurus was named in 2000 by Leonardo Salgado and Claudia Azpilicueta. The fossils were found near General Roca in Río Negro, Argentina.1 3
仍有爭議: Scientists are not sure about the exact age of the rocks where Rocasaurus was found. Some think they are from the Late Campanian, others from the Late Maastrichtian.1