恐龍卡第 1959 張，共 2 027 張

Yamatosaurus

名字的意思： “Yamato reptile”1

吃：植物鴨嘴龍類白堊紀晚期

Yamatosaurus was a duck-billed dinosaur that lived in Japan near the end of the age of dinosaurs. It had a special jaw with only one tooth at a time in each spot, which is different from most other duck-billed dinosaurs. This plant-eater probably lived in coastal areas.2 1

生存年代

72 到 66 百萬年前5

白堊紀晚期

化石發現地

Awaji Island, Hyogo Prefecture, Japan2 1

長度

10 m (33 ft)3

體重

1.7 公噸 (3,700 lb)4

高度

1 m (3.3 ft)3

最高速度

時速約 28 公里（17 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 1 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 56 根香蕉頭尾相接一樣長跟 85 隻狗一樣重跟 340 顆西瓜一樣重跟 89 個幼兒園小朋友一樣重跟 53 個小學生一樣重跟 4 隻北極熊一樣重能在 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Yamatosaurus 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)

Yamatosaurus 時速約 28 公里 (17 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

Yamatosaurus had only one tooth in each tooth socket at a time, which is very unusual for a duck-billed dinosaur.2

It lived about 72 to 66 million years ago during the Maastrichtian stage of the Late Cretaceous.3

The fossils were found in marine rocks, meaning the dinosaur's body was washed into the sea after it died.2

Yamatosaurus is one of the oldest known hadrosaurids, or duck-billed dinosaurs, from Japan.2

Its shoulder bone, the coracoid, lacks a bump called the biceps tubercle, which is a primitive feature.2

The name Yamatosaurus comes from Yamato, an ancient name for Japan.1

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

?How big was Yamatosaurus?

Scientists do not know its exact size because only a partial skeleton has been found, including parts of the jaw, neck bones, and shoulder bone.1 2

?What did Yamatosaurus eat?

It was a plant-eater, like other duck-billed dinosaurs. Its teeth were adapted for chewing plants.1

?When did Yamatosaurus live?

It lived about 71.94 to 71.69 million years ago, during the early Maastrichtian stage of the Late Cretaceous.1 2

?Where was Yamatosaurus found?

Its fossils were discovered on Awaji Island in Japan, in rocks that were once at the bottom of the sea.1 2

給恐龍專家

學名: Yamatosaurus
命名者: Kobayashi et al. 20215
類群: 鴨嘴龍類
科 / 演化支: Hadrosauridae5
分類: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
岩石的年代: 72 到 66 百萬年 (Maastrichtian)5
岩層: Kita-ama5
國家: 日本5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: An amateur fossil collector named Shingo Kishimoto discovered the partial skeleton in May 2004 on Awaji Island, Japan. Scientists Yoshitsugu Kobayashi and colleagues named it Yamatosaurus izanagii in 2021.1 2
仍有爭議: Scientists are not sure exactly how Yamatosaurus is related to other duck-billed dinosaurs, but they think it is a very early member of the group.2