恐龍卡第 1328 張，共 2 027 張

Orodromeus

名字的意思： “mountain runner”1 2

吃：植物有喙的草食恐龍白堊紀晚期

Orodromeus was a small, speedy dinosaur that ran on two legs. It lived in what is now Montana, USA, about 75 million years ago. This plant-eater used its beak and cheek teeth to munch on tough plants.1 2

生存年代

84 到 66 百萬年前3

白堊紀晚期

化石發現地

Montana, USA1 3

長度

2 到 2.5 m (6.6 到 8.2 ft)1 2

體重

50 kg (110 lb)2

高度

0.79 m (2.6 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 2.5 隻狗一樣重

跟 2.5 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長跟 12 隻家貓一樣重跟 10 顆西瓜一樣重跟 2.5 個幼兒園小朋友一樣重跟 1.5 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）

Orodromeus 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)

Orodromeus 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

Orodromeus was discovered at a site called Egg Mountain, which was a nesting colony of the much larger dinosaur Maiasaura.1

The first fossils were found by Robert Makela, and the dinosaur was named after him: Orodromeus makelai.1

Some eggs once thought to belong to Orodromeus are now believed to be from a troodontid dinosaur, like Stenonychosaurus.1

Orodromeus embryos had well-developed bones and teeth, suggesting the babies could walk and feed themselves soon after hatching.1

This dinosaur may have dug burrows, like its relative Oryctodromeus, because its bones have been found in places where they would not normally be scattered.1

Orodromeus lived alongside predators like Daspletosaurus and the horned dinosaur Einiosaurus.1

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

?How big was Orodromeus?

About 2.5 metres (8.2 feet) long. That is roughly the size of a large dog.1 2

?What did Orodromeus eat?

It was a plant-eater. It used its horny beak and grinding cheek teeth to eat tough plant material, and it probably fed on plants no higher than 1 metre (3.3 feet) off the ground.1 2

?When did Orodromeus live?

It lived during the Late Cretaceous Period, about 75 million years ago, in what is now Montana, USA.1 2

?How fast could Orodromeus run?

Nobody knows for sure, but its name means 'mountain runner' and it was built for running on two legs. It was probably very quick.1 2

?Did Orodromeus dig burrows?

Maybe. Scientists think it may have dug burrows like its relative Oryctodromeus, because its bones are sometimes found packed together in ways that suggest burrowing.1

?Was Orodromeus a dinosaur?

Yes, it was a small ornithopod dinosaur, a type of plant-eating dinosaur that walked on two legs.2 1

給恐龍專家

學名: Orodromeus
命名者: Horner and Weishampel 19883
類群: 有喙的草食恐龍
科 / 演化支: Thescelosauridae3
分類: Ornithischia3
岩石的年代: 84 到 66 百萬年 (Campanian / Maastrichtian)3
岩層: Two Medicine, Hell Creek, Judith River3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 9 筆3
發現: Orodromeus was named by Jack Horner and David Weishampel in 1988. The first fossils were found by Robert Makela in Teton County, Montana, during an excavation of the Egg Mountain site.1
仍有爭議: Scientists are not sure if Orodromeus really dug burrows, because the evidence is not yet strong.1