恐龍卡第 0227 張，共 2 027 張

Bajadasaurus

名字的意思： “downhill lizard, from the Spanish word bajada (downhill) and the Greek sauros (lizard)”1

吃：植物長脖子恐龍白堊紀早期

Bajadasaurus was a small, long-necked dinosaur that lived in what is now Patagonia, Argentina. It had a row of super long, forward-pointing spines on its neck that probably helped protect it from hungry predators. This plant-eater was about the size of an Asian elephant, small for a sauropod.2 1

生存年代

139 到 133 百萬年前4

白堊紀早期

化石發現地

Bajada Colorada locality, 40 km south of Picún Leufú, Neuquén Province, Patagonia, Argentina1 2

長度

10 到 12 m (33 到 39 ft)3

體重

4 公噸到 6 公噸 (8,800 到 13,200 lb)2

高度

2.5 到 3 m (8.2 到 9.8 ft)2

最高速度

時速約 19 公里（12 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 2.5 台汽車排成一排一樣長跟 67 根香蕉頭尾相接一樣長大約跟一頭大象一樣重跟 1200 顆西瓜一樣重跟 8 整班小學生一樣重跟 13 隻北極熊一樣重能在 19 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Bajadasaurus 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)

Bajadasaurus 時速約 19 公里 (12 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

Bajadasaurus had a pair of extremely long, forward-curving spines on each neck vertebra, forming a kind of spiky fence.1

Its skull is one of the most complete ever found for a dicraeosaurid, a group of sauropods with short necks.1

The dinosaur had about 48 pencil-shaped teeth, all at the front of its jaws.2

Its eye openings were visible from above, which may have helped it look forward while eating low plants.2

Bajadasaurus lived around 139 to 133 million years ago, during the Early Cretaceous period.3

The only known specimen was found in 2010 by paleontologist Pablo Gallina, preserved as a single block of rock.2

It shared its home with other sauropods like Leinkupal and Ninjatitan, as well as meat-eating theropods.2

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

?How big was Bajadasaurus?

It was about 9 to 10 metres long, which is small for a sauropod. It was roughly the size of a modern Asian elephant.2

?What did Bajadasaurus eat?

It was a plant-eater, or herbivore. It had about 48 pencil-shaped teeth at the front of its jaws for stripping leaves.2

?Why did Bajadasaurus have long spines?

Scientists think the long, forward-pointing spines on its neck were used for passive defense against predators, like a spiky fence. They might also have been for display.1 2

?When did Bajadasaurus live?

It lived during the Early Cretaceous period, about 145 to 132.9 million years ago.2

?Where was Bajadasaurus found?

Its fossils were found in Patagonia, Argentina, at a place called Bajada Colorada. The only specimen was discovered in 2010.2

?Is Bajadasaurus a dinosaur?

Yes, it is a dinosaur. It is a sauropod dinosaur from the group Dicraeosauridae.2

迷思破解王

迷思： Some people think the long spines on Bajadasaurus's neck were used as a sail for cooling down.

真相： Scientists now believe the spines were a passive defense, like a spiky fence, to protect against predators.1

給恐龍專家

學名: Bajadasaurus
命名者: Gallina et al. 20194
類群: 長脖子恐龍
科 / 演化支: Dicraeosauridae4
分類: Sauropodomorpha > Sauropoda > Diplodocoidea4
岩石的年代: 139 到 133 百萬年 (Berriasian / Valanginian)4
岩層: Bajada Colorada4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Bajadasaurus was named in 2019 by paleontologist Pablo Gallina and his team. The single fossil was found in 2010 at the Bajada Colorada site in Argentina.2 1
仍有爭議: Scientists are still debating whether the long neck spines were used mainly for defense, display, or something else.1