恐龍卡第 0682 張，共 2 027 張

Futabasaurus

名字的意思： “Futaba lizard”1

吃：肉蛇頸龍類白堊紀晚期嚴格來說不是恐龍

Futabasaurus was a long-necked marine reptile that swam in the seas around Japan about 85 million years ago. It was not a dinosaur but a plesiosaur, a type of ocean predator. Its fossils were found by a high school student!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

86 到 84 百萬年前5

白堊紀晚期

化石發現地

Fukushima Prefecture, Japan1

長度

6.4 到 9.2 m (21 到 30 ft)1

最高速度

時速約 23 公里（14 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 51 根香蕉頭尾相接一樣長能在 7.8 秒內游完一座大泳池（50 公尺）

Futabasaurus 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)

Futabasaurus 時速約 23 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

Futabasaurus is the first elasmosaurid plesiosaur ever found in Japan.1

Its bones show bite marks from sharks, especially a type called Cretalamna, which scavenged or attacked it after death.1

The name Futabasaurus comes from the Futaba Group of rocks where it was discovered.1

The species name suzukii honors Tadashi Suzuki, the high school student who found the fossils.1

Futabasaurus lived during the Santonian stage of the Late Cretaceous, about 86 to 83 million years ago.2

It had a long neck like other elasmosaurids, and its front flippers were longer than its back ones.1

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

?Was Futabasaurus a dinosaur?

No, Futabasaurus was a plesiosaur, a marine reptile, not a dinosaur. Its legs grew outwards from the body, unlike dinosaurs whose legs are directly underneath.3 1

?How big was Futabasaurus?

Futabasaurus was over 6 metres long, possibly between 6.4 and 9.2 metres. That is about as long as a bus.1 4

?What did Futabasaurus eat?

Futabasaurus was a predator, but its exact diet is not known. It likely ate fish and other sea animals, as other plesiosaurs did.1

?When did Futabasaurus live?

Futabasaurus lived about 85 million years ago, during the Late Cretaceous Period, in the Santonian stage.1 3

?Who discovered Futabasaurus?

Futabasaurus was discovered in 1968 by Tadashi Suzuki, who was a high school student at the time. He found the fossil in Fukushima, Japan.1 3

?Why is it called Futabasaurus?

It is named after the Futaba Group of rocks in Japan where it was found. The species name suzukii honors its discoverer, Tadashi Suzuki.1

迷思破解王

迷思： Futabasaurus is a dinosaur.

真相： Futabasaurus is a plesiosaur, a marine reptile, not a dinosaur. Dinosaurs lived on land.1

給恐龍專家

學名: Futabasaurus
命名者: Sato et al. 20065
類群: 蛇頸龍類
科 / 演化支: Elasmosauridae5
分類: Plesiosauria > Elasmosauridae > Sauropterygia5
岩石的年代: 86 到 84 百萬年 (Santonian)5
岩層: Tamayama5
國家: 日本5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: The fossils were found by high school student Tadashi Suzuki in the Irimazawa Member of the Tamayama Formation in Fukushima, Japan. Scientists Tamaki Sato, Yoshikazu Hasegawa, and Makoto Manabe named it in 2006.1
仍有爭議: Scientists are not sure exactly how long Futabasaurus was, with estimates ranging from 6.4 to 9.2 metres.1