恐龍卡第 0938 張，共 2 027 張

Kaijutitan

名字的意思： “Kaiju titan, after the Japanese word for strange beast or monster”1

吃：植物長脖子恐龍白堊紀晚期

Kaijutitan was a giant, long-necked plant-eater that lived in what is now Argentina. It is one of the earliest known titanosaurs, a group that includes the biggest dinosaurs ever. Its neck bones had a strange split shape, like a fork.4 2

生存年代

90 到 86 百萬年前4

白堊紀晚期

化石發現地

Cañadón Mistringa, about 9 km southwest of Rincón de los Sauces, Neuquén Province, Argentina1 2

體重

38 公噸到 60.398 公噸 (83,800 到 133,200 lb)2

最高速度

時速約 9 公里（6 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？

牠有多重？

跟 10 頭大象一樣重

跟 12000 顆西瓜一樣重跟 75 整班小學生一樣重能在 40 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Kaijutitan 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)

Kaijutitan 時速約 9 公里 (6 mph)

騎腳踏車的小朋友 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

Kaijutitan is the latest known basal titanosaur, meaning it lived near the end of the time when early titanosaurs existed.2

Its neck vertebrae had bifid (split) neural spines, a feature that evolved several times among sauropods but is rare in titanosaurs.2

The fossil includes part of the skull, which is very unusual for large titanosaurs because their skulls are rarely preserved.2

Kaijutitan lived about 89 to 86 million years ago, during the Coniacian stage of the Late Cretaceous.4

Its bones were found scattered in an area of about 20 square metres, suggesting the carcass fell apart before being buried.2

The species name maui honors the Museo Municipal Argentino Urquiza (MAU), where the fossil is stored.1

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

?How big was Kaijutitan?

Scientists don't know its exact size yet, but it was a huge sauropod, one of the giant titanosaurs. Its bones show it was an adult of huge body size.3 1

?What did Kaijutitan eat?

Kaijutitan was a plant-eater, like all sauropods. It used its long neck to reach leaves from tall trees.1

?Why did Kaijutitan have a split neck spine?

The split (bifid) neural spines on its neck vertebrae are a rare feature in titanosaurs. Scientists think it evolved several times in different sauropod groups, but its exact purpose is not known.1 2

給恐龍專家

學名: Kaijutitan
命名者: Filippi et al. 20194
類群: 長脖子恐龍
科 / 演化支: Lithostrotia4
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria4
岩石的年代: 90 到 86 百萬年 (Coniacian)4
岩層: Sierra Barrosa4
國家: 阿根廷4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Kaijutitan was named in 2019 by paleontologists Leonardo Filippi, Leonardo Salgado, and Alberto Garrido. The skeleton was found by a team from the Museo Municipal Argentino Urquiza and the Museo Provincial de Ciencias Naturales in Argentina.4 2
仍有爭議: Scientists are not sure exactly how big Kaijutitan was, because only a partial skeleton has been found.2