恐龍卡第 1471 張，共 2 027 張

Probactrosaurus

名字的意思： “before Bactrosaurus”1

吃：植物有喙的草食恐龍白堊紀早期

Probactrosaurus was a plant-eating dinosaur that lived in China during the Early Cretaceous period. It had a narrow snout and long arms, and it could walk on two or four legs. Scientists think it was an early relative of the duck-billed dinosaurs.2

生存年代

121 到 100 百萬年前4

白堊紀早期

化石發現地

Inner Mongolia, China2 3

長度

5.5 到 6 m (18 到 20 ft)2 1

體重

1 公噸 (2,200 lb)2

高度

1.8 m (5.9 ft)

估計值

最高速度

時速約 33 公里（21 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 50 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 33 根香蕉頭尾相接一樣長跟 200 顆西瓜一樣重跟 53 個幼兒園小朋友一樣重跟 31 個小學生一樣重跟 2 隻北極熊一樣重能在 11 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Probactrosaurus 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)

Probactrosaurus 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

Probactrosaurus means 'before Bactrosaurus' because the scientist who named it thought it was the ancestor of Bactrosaurus. That idea is no longer accepted.2

It had a small thumb spike, unlike later duck-billed dinosaurs which lost their thumb spikes.2

Probactrosaurus lived about 121 to 99 million years ago, during the Early Cretaceous.1 3

Its fossils were found in the Miaogou Formation in Inner Mongolia, China.2 3

Probactrosaurus had a double row of cheek teeth, with a third row of replacement teeth starting to grow. This helped it grind up plants.2

The first fossils were discovered by a Soviet-Chinese expedition in 1959 and 1960.2

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

給恐龍專家

學名: Probactrosaurus
命名者: Rozhdestvensky 19664
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 100 百萬年 (Aptian / Albian)4
岩層: Miaogou4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: Probactrosaurus was named by Soviet paleontologist A. K. Rozhdestvensky in 1966. The fossils were found in Inner Mongolia, China, during a Soviet-Chinese expedition in 1959 and 1960.2 1
仍有爭議: Scientists are still debating exactly where Probactrosaurus sits on the dinosaur family tree. Some think it is a very early hadrosauroid, while others place it closer to the duck-billed dinosaurs.2