恐龍卡第 0939 張，共 2 027 張

Kaikaifilu

名字的意思： “named after Coi Coi-Vilu, a reptilian ocean deity from Mapuche mythology”1

吃：肉滄龍類白堊紀晚期嚴格來說不是恐龍

Kaikaifilu was a giant marine lizard that swam in the cold seas near Antarctica 66 million years ago. It was one of the biggest mosasaurs in the Southern Hemisphere, with a skull as long as a tall child!1

趣味小知識：這種海生爬蟲類在海裡游泳的時候，恐龍正在陸地上走路。大家都叫牠們恐龍，但牠們其實是爬蟲類的另一個分支。

生存年代

72 到 66 百萬年前4

白堊紀晚期

化石發現地

Seymour Island, Antarctic Peninsula4 1

長度

最多 10 m (33 ft)1

最高速度

時速約 33 公里（21 英里）

游泳, 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？

跟 2 台汽車排成一排一樣長跟 56 根香蕉頭尾相接一樣長能在 5.5 秒內游完一座大泳池（50 公尺）

Kaikaifilu 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)

Kaikaifilu 時速約 33 公里 (21 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

Kaikaifilu had different types of teeth in its mouth, which is rare for mosasaurs. This is called heterodont dentition.1

Its skull was about 1.1 to 1.2 metres long, almost twice as long as the skull of another Antarctic mosasaur called Taniwhasaurus antarcticus.1

Kaikaifilu lived in waters that could be as cold as 6 °C, and sometimes the sea surface temperature dropped below freezing.1

It lived right at the end of the Age of Dinosaurs, during the Cretaceous-Paleogene extinction event, and was one of the last mosasaurs to exist.1

The only known fossil of Kaikaifilu is a partial skull and a humerus (upper arm bone), found in 2011 by a Chilean expedition.2

Scientists think Kaikaifilu might belong to the Tylosaurinae group, but some features make this uncertain.1

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

?How big was Kaikaifilu?

About 10 metres long, making it the largest mosasaur known from the Southern Hemisphere.1 3

?What did Kaikaifilu eat?

It was an apex predator that ate fish, plesiosaurs, other mosasaurs, and filter-feeding marine reptiles.1 3

?When did Kaikaifilu live?

It lived about 66 million years ago, right at the end of the Age of Dinosaurs, during the Cretaceous-Paleogene extinction event.1 3

?Where was Kaikaifilu found?

Its fossil was found on Seymour Island in Antarctica, by a Chilean expedition in 2011.1

?Is Kaikaifilu a dinosaur?

No, it is a mosasaur, which is a giant marine lizard, not a dinosaur.1 3

?Why did Kaikaifilu have different teeth?

It had different types of teeth (heterodont dentition), which is rare for mosasaurs and helped it eat a variety of prey.1

給恐龍專家

學名: Kaikaifilu
命名者: Otero et al. 20174
類群: 滄龍類
科 / 演化支: Mosasauridae4
分類: Mosasauroidea4
岩石的年代: 72 到 66 百萬年 (Maastrichtian)4
岩層: Lopez de Bertodano4
國家: 南極洲4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Kaikaifilu was named in 2017 by Rodrigo Otero and colleagues, based on a fossil found in January 2011 on Seymour Island, Antarctica, by a Chilean expedition.4 2
仍有爭議: Scientists are not sure if Kaikaifilu truly belongs to the Tylosaurinae group, because some of its features are different from other tylosaurines.1