恐龍卡第 0076 張，共 2 027 張

Allosaurus

名字的意思： “different lizard”1

吃：肉肉食恐龍侏羅紀晚期到白堊紀早期

Allosaurus was a huge meat-eating dinosaur that lived during the Late Jurassic period. It had a big head full of sharp, serrated teeth and walked on two strong legs. It was one of the top predators of its time, hunting large plant-eaters.1

生存年代

162 到 137 百萬年前4

侏羅紀晚期到白堊紀早期

化石發現地

North America (Morrison Formation), Portugal, and possibly Germany, Tanzania, and Switzerland1

長度

7.5 到 9 m (25 到 30 ft)1

體重

1 公噸到 4 公噸 (2,200 到 8,800 lb)1

高度

2.7 m (8.9 ft)

估計值

最高速度

時速約 34 公里（21 英里）

跑步: Sellers & Manning 2007 (Christiansen 1998: 30 to 55)

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 台汽車一樣重

跟 2 台汽車排成一排一樣長跟 50 根香蕉頭尾相接一樣長跟 200 隻狗一樣重跟 800 顆西瓜一樣重跟 5 整班小學生一樣重跟 9 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）

Allosaurus 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)

Allosaurus 時速約 34 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

Allosaurus had dozens of sharp, serrated teeth in its mouth, perfect for slicing meat.1

Its name means 'different lizard' because its backbone bones were light and hollow, which was unusual for a dinosaur of its size.1

Allosaurus lived from about 155 to 143 million years ago, during the Late Jurassic period.1

It was one of the most common large predators in its ecosystem, and many fossils have been found in the Morrison Formation.1

Some scientists think Allosaurus may have hunted in packs, but others think it was a solitary predator that only gathered in groups sometimes.1

Allosaurus had small, three-fingered hands, but its legs were large and powerful for running after prey.1

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

?How big was Allosaurus?

Allosaurus averaged about 8.5 meters (28 feet) long, with the largest specimens estimated at 9.7 meters (32 feet). It weighed around 2,700 kilograms (about 6,000 pounds).1 3

?What did Allosaurus eat?

Allosaurus was a meat-eater that hunted large plant-eating dinosaurs like Stegosaurus, Diplodocus, and other ornithopods, stegosaurids, and sauropods. It may have also scavenged on dead dinosaurs.1 3

?When did Allosaurus live?

Allosaurus lived during the Late Jurassic period, about 155 to 143 million years ago. Some sources say 152 to 145 million years ago.1 3

?Where was Allosaurus found?

Most Allosaurus fossils come from North America's Morrison Formation, but some have also been found in Portugal. It lived in what is now the USA.1 3

?Was Allosaurus bigger than T. rex?

No, Allosaurus was smaller than T. rex. Allosaurus was about 8.5 to 9.7 meters long, while T. rex reached lengths of 12 to 13 meters.1

?Did Allosaurus hunt in packs?

Scientists aren't sure. Some think Allosaurus may have hunted in packs, but others think it was a solitary predator that only gathered in groups sometimes. There's evidence for both ideas.1 3

?How fast could Allosaurus run?

Up to about 34 km/h (21 mph), about as fast as a fast human runner. A computer model of its legs and muscles worked this out. Its big, strong legs were made for running after prey.1

?Did Allosaurus have feathers?

The sources don't mention feathers on Allosaurus. It is known to have had scaly skin, but no feather fossils have been found.1

?Why is it called Allosaurus?

Allosaurus means 'different lizard' in Greek. It got this name because its backbone bones were light and hollow, which was unusual for a dinosaur of its size.1

?Could Allosaurus swim?

The sources don't say whether Allosaurus could swim. It was a land dinosaur that walked on two legs, so it probably didn't swim often.1

迷思破解王

迷思： Some people think Allosaurus was a slow, clumsy scavenger.

真相： Scientists think Allosaurus was a fast and active predator, with strong legs and sharp teeth for hunting live prey.1

給恐龍專家

學名: Allosaurus
命名者: Marsh 18774
類群: 肉食恐龍
科 / 演化支: Allosauroidea4
分類: Theropoda > Allosauroidea4
岩石的年代: 162 到 137 百萬年 (Oxfordian / Berriasian)4
岩層: Morrison, Alcobaça, Lourinhã4
國家: 美國, 葡萄牙, 法國, 德國4
化石紀錄: The Paleobiology Database 收錄 147 筆4
又名: Antrodemus, Apatodon, Creosaurus, Epanterias, Labrosaurus, Saurophagus （舊名稱現在也算作同一種動物）4
發現: The first fossils that could be clearly assigned to Allosaurus were described in 1877 by Othniel C. Marsh. He named it Allosaurus, meaning 'different lizard'.1
仍有爭議: Scientists still debate whether Allosaurus hunted in cooperative packs or was a solitary predator that sometimes gathered in groups.1