恐龍卡第 0884 張，共 2 027 張

Isanosaurus

名字的意思： “lizard from north-eastern Thailand”1

吃：植物長脖子恐龍侏羅紀早期

Isanosaurus was one of the very first long-necked sauropod dinosaurs. It walked on all four legs and lived in what is now Thailand during the Early Jurassic Period, about 197 to 192 million years ago.1 3

生存年代

193 到 175 百萬年前3

侏羅紀早期

化石發現地

Chaiyaphum Province, north-eastern Thailand1

長度

最多 6.5 m (21 ft)1

體重

最多 3.46209 公噸 (7,600 lb)2

最高速度

時速約 21 公里（13 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？

牠有多重？

跟 2.5 台汽車一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 36 根香蕉頭尾相接一樣長跟 170 隻狗一樣重跟 690 顆西瓜一樣重跟 4 整班小學生一樣重跟 8 隻北極熊一樣重能在 17 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Isanosaurus 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)

Isanosaurus 時速約 21 公里 (13 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

Isanosaurus was one of the earliest sauropods, the group that later included giants like Brachiosaurus and Diplodocus.1

Its thigh bone is 76 centimetres long and very straight, showing it had column-like legs for walking on all fours.1

The only known skeleton was found in 1998 near the village of Ban Non Thaworn, but most of it had already eroded away.1

Isanosaurus had neck vertebrae that were ball-and-socket joints, making its neck flexible.1

Scientists used to think Isanosaurus lived in the Late Triassic, but in 2026 new dating showed it lived in the Early Jurassic.1

The tail vertebrae of Isanosaurus were hollow at both ends, like a double-sided cup.1

Isanosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Isanosaurus 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。

迷思破解王

迷思： Isanosaurus was the oldest sauropod dinosaur.

真相： It was once thought to be from the Late Triassic, but newer dating shows it lived in the Early Jurassic, about 197 to 192 million years ago. Other sauropods may be older.1

給恐龍專家

學名: Isanosaurus
命名者: Buffetaut et al. 20003
類群: 長脖子恐龍
科 / 演化支: Sauropoda3
分類: Sauropodomorpha > Sauropoda3
岩石的年代: 193 到 175 百萬年 (Pliensbachian / Toarcian)3
岩層: Nam Phong3
國家: 泰國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Isanosaurus was named in 2000 by French palaeontologist Éric Buffetaut and his team. The species name attavipachi honours P. Attavipach, a supporter of Thai palaeontology.1
仍有爭議: Scientists are not sure exactly how Isanosaurus is related to other early sauropods, because the only known fossils are very incomplete.1