恐龍卡第 0303 張，共 2 027 張

Bravasaurus

名字的意思： “Laguna Brava lizard”1

吃：植物長脖子恐龍白堊紀晚期

Bravasaurus was a small, long-necked plant eater that lived in what is now Argentina. It was a titanosaur, a group of huge sauropods, but Bravasaurus was one of the smallest of its family. It walked on four sturdy legs and munched on leaves with its peg-like teeth.1 4

生存年代

84 到 66 百萬年前4

白堊紀晚期

化石發現地

Quebrada de Santo Domingo in La Rioja, northwestern Argentina2 4

長度

7 m (23 ft)3

體重

2.89 公噸 (6,400 lb)2 3

高度

1.9 m (6.2 ft)

估計值

最高速度

時速約 22 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？

估計值

牠有多重？

跟 2 台汽車一樣重

跟 7 隻狗從鼻子接到尾巴一樣長跟 39 根香蕉頭尾相接一樣長跟 140 隻狗一樣重跟 580 顆西瓜一樣重跟 4 整班小學生一樣重跟 6 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）

Bravasaurus 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)

Bravasaurus 時速約 22 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

Bravasaurus is one of the smallest titanosaurs ever found. Scientists think it weighed about 3 tons, much less than giants like Argentinosaurus.2

Its name comes from Laguna Brava, a lake in Argentina, and 'arrierosorum' honors the people who crossed the Andes with cattle in the 1800s.1

Fossils of Bravasaurus were found in rocks that are between 83.6 and 66 million years old, from the Late Cretaceous period.4

The place where Bravasaurus was found, Quebrada de Santo Domingo, is one of the largest dinosaur nesting sites in the world. Scientists found many titanosaur eggs there.2

Bravasaurus had a slender fibula, a bone in the lower leg, which is unusual for a sauropod. Its fibula was very thin compared to its length.2

Unlike some dwarf titanosaurs that lived on islands, Bravasaurus lived inland, far from the sea.2

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

?How big was Bravasaurus?

About 7 metres long and weighed nearly 2.9 metric tons. It was one of the smallest titanosaurs.3 1

?What did Bravasaurus eat?

It was a plant eater. It had peg-like teeth for munching on leaves.3

?When did Bravasaurus live?

It lived during the Late Cretaceous period, between about 83.6 and 66 million years ago.3 2

迷思破解王

迷思： All sauropods were gigantic, like Argentinosaurus.

真相： Not all sauropods were huge. Bravasaurus was a small titanosaur, weighing only about 3 tons, which is small compared to its giant relatives.2

給恐龍專家

學名: Bravasaurus
命名者: Hechenleitner et al. 20204
類群: 長脖子恐龍
科 / 演化支: Rinconsauria4
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria4
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)4
岩層: Ciénaga del Río Huaco4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Bravasaurus was named in 2020 by Hechenleitner and colleagues. They found its fossils in the Ciénaga del Río Huaco Formation in La Rioja, Argentina.4 2
仍有爭議: Scientists are still debating exactly how Bravasaurus is related to other titanosaurs. Some studies suggest it is closely related to species from Patagonia and Brazil, but the exact family tree is not fully agreed upon.2