恐龍卡第 1536 張，共 2 027 張

Ratchasimasaurus

名字的意思： “Nakhon Ratchasima lizard”1

吃：植物有喙的草食恐龍白堊紀早期

Ratchasimasaurus was a plant-eating dinosaur that lived in what is now Thailand. It had a long, flat jawbone that helped it chew tough plants. This dinosaur was about the size of a small car.1 2

生存年代

121 到 113 百萬年前4

白堊紀早期

化石發現地

Ban Pong Malaengwan, Nakhon Ratchasima province, northeastern Thailand4 1

長度

3 m (9.8 ft)3

體重

120 kg (265 lb)3

高度

0.94 m (3.1 ft)

估計值

最高速度

時速約 45 公里（28 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

牠有多重？

跟 6 隻狗一樣重

跟 3 隻狗從鼻子接到尾巴一樣長跟 17 根香蕉頭尾相接一樣長跟 24 顆西瓜一樣重跟 6 個幼兒園小朋友一樣重跟 4 個小學生一樣重能在 8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Ratchasimasaurus 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)

Ratchasimasaurus 時速約 45 公里 (28 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

Ratchasimasaurus is only known from a single left lower jawbone, called a dentary, which is 198.1 millimetres (7.80 inches) long.1

Its jawbone was long and flat, a unique feature that helps scientists tell it apart from other dinosaurs.1 2

This dinosaur lived during the Early Cretaceous period, about 121 to 113 million years ago.4

Ratchasimasaurus had both primitive and advanced features, like a backward-slanting coronoid process and a shelf between its teeth and jaw joint.1 2

The fossil was found by a local farmer near a pond in Thailand, likely between 2002 and 2004.1

Its species name, suranareae, honors Thao Suranari, a 19th-century war heroine from Thailand.1

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

?What did Ratchasimasaurus eat?

Ratchasimasaurus was a plant-eating dinosaur, as shown by its beaked mouth and jaw features for chewing tough plants. Its diet is listed as herbivore in the Paleobiology Database.4

?How big was Ratchasimasaurus?

The only known fossil is a jawbone, so its full size is uncertain. The dentary is 198.1 millimetres (7.80 inches) long, and the dinosaur was about the size of a small car, based on the page's intro.1

?When did Ratchasimasaurus live?

It lived during the Early Cretaceous period, about 121 to 113 million years ago (Aptian stage). This is based on the age range given in the Paleobiology Database.4

給恐龍專家

學名: Ratchasimasaurus
命名者: Shibata et al. 20114
類群: 有喙的草食恐龍
科 / 演化支: Hadrosauroidea4
分類: Ornithischia > Ornithopoda > Iguanodontia4
岩石的年代: 121 到 113 百萬年 (Aptian)4
岩層: Khok Kruat4
國家: 泰國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Ratchasimasaurus was named in 2011 by Masateru Shibata, Pratueng Jintasakul, and Yoichi Azuma based on a jawbone found in the Khok Kruat Formation of Thailand.4 1
仍有爭議: Some scientists think Ratchasimasaurus might be a nomen dubium, meaning its fossils are too incomplete to be sure it is a distinct species.1