恐龍卡第 1141 張，共 2 027 張

Marshosaurus

名字的意思： “Marsh's lizard, named after the famous paleontologist Othniel Charles Marsh”1

吃：肉肉食恐龍侏羅紀晚期到白堊紀早期

Marshosaurus was a medium-sized meat-eating dinosaur that lived in North America during the Late Jurassic period. It was a fast and agile hunter, using its sharp teeth and claws to catch prey.1

生存年代

155 到 143 百萬年前3

侏羅紀晚期到白堊紀早期

化石發現地

Utah and possibly Colorado, USA1 3

長度

4.5 m (15 ft)1

體重

200 kg (441 lb)1

高度

1.4 m (4.6 ft)

估計值

最高速度

時速約 49 公里（30 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 10 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 25 根香蕉頭尾相接一樣長跟 40 顆西瓜一樣重跟 11 個幼兒園小朋友一樣重跟 6 個小學生一樣重能在 7.3 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Marshosaurus 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)

Marshosaurus 時速約 49 公里 (30 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

Marshosaurus was named in 1976 by James Madsen, and its species name bicentesimus honors the 200th birthday of the United States.1

The first fossil of Marshosaurus was a left hip bone (ilium) found at the Cleveland-Lloyd Dinosaur Quarry in Utah.1

Marshosaurus lived alongside many other dinosaurs, including the giant sauropods like Diplodocus and the predator Allosaurus.1

Scientists think Marshosaurus was about 4.5 meters (15 feet) long and weighed around 200 kilograms (440 pounds).1

Marshosaurus belonged to a group of theropods called Piatnitzkysauridae, which were early relatives of larger meat-eaters.3

The Morrison Formation, where Marshosaurus was found, was a semiarid environment with rivers and floodplains.1

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

?How big was Marshosaurus?

About 4.5 meters (15 feet) long and 200 kilograms (440 pounds), based on a 2010 estimate by Gregory S. Paul.1

?What did Marshosaurus eat?

It was a carnivore, so it ate meat. It likely hunted small and medium-sized prey, using its sharp teeth and claws.1

?When did Marshosaurus live?

It lived during the Late Jurassic period, about 155 to 152 million years ago, in the Morrison Formation of Utah and possibly Colorado.1

?Where was Marshosaurus found?

Its fossils were found at the Cleveland-Lloyd Dinosaur Quarry in Utah, and possibly in Colorado and Dinosaur National Monument.1

?Was Marshosaurus bigger than Allosaurus?

No, Marshosaurus was smaller. It was about the size of a young subadult Allosaurus, while Allosaurus was a top predator in the same environment.2

?Did Marshosaurus have feathers?

Scientists do not know for sure. No feather fossils of Marshosaurus have been found, and it is not clear if it had them.1

給恐龍專家

學名: Marshosaurus
命名者: Madsen 19763
類群: 肉食恐龍
科 / 演化支: Piatnitzkysauridae3
分類: Theropoda3
岩石的年代: 155 到 143 百萬年 (Kimmeridgian / Tithonian)3
岩層: Morrison3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 3 筆3
發現: Marshosaurus was named by James Madsen in 1976 based on fossils from the Cleveland-Lloyd Dinosaur Quarry in Utah. The name honors paleontologist Othniel Charles Marsh.1
仍有爭議: Scientists are still debating exactly where Marshosaurus fits in the dinosaur family tree. Some think it was a megalosauroid, while others place it with more bird-like theropods.1