恐龍卡第 1275 張，共 2 027 張

Ninjatitan

名字的意思： “Ninja giant”1

吃：植物長脖子恐龍白堊紀早期

Ninjatitan was a huge, long-necked plant-eater that lived in what is now Argentina. It is one of the oldest titanosaur relatives ever found.1 3

生存年代

139 到 133 百萬年前3

白堊紀早期

化石發現地

Bajada Colorada Formation, Neuquén Province, Argentina3 1

長度

20 m (66 ft)2

高度

4.5 m (15 ft)

估計值

最高速度

時速約 12 公里（7 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 4 台汽車排成一排一樣長跟 110 根香蕉頭尾相接一樣長高到能從 2 樓的窗戶往裡看能在 30 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Ninjatitan 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)

Ninjatitan 時速約 12 公里 (7 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

Ninjatitan was named in 2021 after a nickname of Argentine paleontologist Sebastian Apesteguia, who was called 'Ninja'.1

Its fossils were found in rocks that are about 140 to 134 million years old, from the Early Cretaceous period.1

When it was first described, scientists thought Ninjatitan was the oldest known titanosaur, but later research showed that Tengrisaurus from Russia is about the same age and more clearly a titanosaur.1

Some scientists now think Ninjatitan might not be a titanosaur at all, because its tail bones look more like those of other long-necked dinosaurs called diplodocoids.1

The skeleton of Ninjatitan was found in the same area as two other long-necked dinosaurs, Leinkupal and Bajadasaurus, but from a slightly deeper rock layer.1

Ninjatitan's back bones have a honeycomb-like internal structure, which is a feature of titanosauriforms and helped make the skeleton lighter.1

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

?How big was Ninjatitan?

Ninjatitan grew to about 20 metres (66 feet) long, with column-like legs and a long neck and tail. That is about the length of two school buses.2

?When did Ninjatitan live?

Ninjatitan lived during the Early Cretaceous period, about 140 to 134 million years ago. That is the Berriasian to Valanginian age.1 3

?Was Ninjatitan the oldest titanosaur?

When first described in 2021, scientists thought Ninjatitan was the oldest titanosaur, but later research showed that Tengrisaurus from Russia is about the same age and more clearly a titanosaur. Some scientists now think Ninjatitan might not be a titanosaur at all.1 2

?What did Ninjatitan eat?

Ninjatitan was a plant-eater, like other sauropods. It used its long neck to reach leaves and other vegetation.1

給恐龍專家

學名: Ninjatitan
命名者: Gallina et al. 20213
類群: 長脖子恐龍
科 / 演化支: Titanosauria3
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria3
岩石的年代: 139 到 133 百萬年 (Berriasian / Valanginian)3
岩層: Bajada Colorada3
國家: 阿根廷3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Ninjatitan was named and described in 2021 by paleontologists Pablo Gallina, Juan Canale, and José Carballido, based on a partial skeleton found in 2014 in Argentina.1 3
仍有爭議: Scientists still debate whether Ninjatitan truly belongs to the titanosaur group or if it should be classified outside of it.1