恐龍卡第 0514 張，共 2 027 張

Dilophosaurus

名字的意思： “two-crested lizard”1

吃：肉肉食恐龍侏羅紀早期

Dilophosaurus was a big, fast meat-eating dinosaur that lived in North America about 186 million years ago. It had two thin crests on its head and strong jaws that could crush bone. It was the biggest land predator in its neighborhood during the Early Jurassic.1 2

生存年代

201 到 184 百萬年前4

侏羅紀早期

化石發現地

Arizona, Utah, USA; also India1 4

長度

6 m (20 ft)1

體重

283 kg 到 400 kg (624 到 882 lb)1 2

高度

1.36 到 1.75 m (4.5 到 5.7 ft)1 2

最高速度

時速約 38 公里（24 英里）

跑步: Sellers & Manning 2007

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？

牠有多重？

跟 20 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 80 顆西瓜一樣重跟 21 個幼兒園小朋友一樣重跟 12 個小學生一樣重能在 9.5 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Dilophosaurus 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)

Dilophosaurus 時速約 38 公里 (24 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

Dilophosaurus had two thin crests on its head made from the nasal and lacrimal bones. These crests might have been used for display or to attract mates.1 2

Its jaws were strong enough to puncture bone, and it may have been the top predator in its ecosystem.1

Some scientists think Dilophosaurus might have eaten fish. Its jaws had a 'rosette' of interlocking teeth like modern fish-eating crocodiles and gharials.1

Dilophosaurus breathed like a bird. Air sacs in its bones allowed unidirectional airflow in its lungs, which gave it more oxygen and made it a fast, active hunter.1

Fossil footprints of Dilophosaurus have been found, including traces where it rested.1

It lived in a seasonally dry environment with rivers and sand dunes, like a river oasis surrounded by a desert.1

Dilophosaurus was the largest land animal in North America during the Early Jurassic, bigger than any other predator at that time.2

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

?How big was Dilophosaurus?

About 7 metres (23 ft) long and weighed around 400 kg (880 lb). It was one of the earliest large predatory dinosaurs.1

?Did Dilophosaurus have feathers?

The sources do not say whether Dilophosaurus had feathers. No fossil evidence of feathers has been found for this dinosaur.1

?Could Dilophosaurus spit venom?

No. That was made up for the movie Jurassic Park. The real Dilophosaurus did not spit venom.1

?What did Dilophosaurus eat?

It was a meat-eater that probably hunted large animals, smaller animals, and maybe fish. Its strong jaws could even puncture bone.1

?How fast could Dilophosaurus run?

Up to about 38 km/h (24 mph), about as fast as a fast human runner. A computer model of its legs and muscles worked this out. It was a fast, agile hunter.3

?Why did Dilophosaurus have crests?

Nobody knows for sure, but they were probably used for display, like to recognize other Dilophosaurus or attract mates. They were too weak for fighting.1

?Was Dilophosaurus bigger than T. rex?

No. Dilophosaurus was about 7 metres (23 ft) long, much smaller than Tyrannosaurus rex, which could be over 12 metres (39 ft) long.1

?When did Dilophosaurus live?

It lived during the Early Jurassic, about 186 million years ago.1

?Is Dilophosaurus a dinosaur?

Yes, it is a theropod dinosaur, a type of meat-eating dinosaur.1

?Where was Dilophosaurus found?

Its fossils were discovered in northern Arizona, in the Kayenta Formation, on Navajo land.1

迷思破解王

迷思： Dilophosaurus could spit venom like in the movie Jurassic Park.

真相： There is no evidence that Dilophosaurus spat venom. It was a large predator with strong jaws and teeth, not a small frilled dinosaur that spits poison.1

給恐龍專家

學名: Dilophosaurus
命名者: Welles 19704
類群: 肉食恐龍
科 / 演化支: Neotheropoda4
分類: Theropoda4
岩石的年代: 201 到 184 百萬年 (Hettangian / Pliensbachian)4
岩層: Kayenta, Dharmaram4
國家: 美國, 印度4
化石紀錄: The Paleobiology Database 收錄 14 筆4
發現: Three skeletons were found in northern Arizona in 1940 and collected in 1942. Scientist Samuel P. Welles named the first specimen Megalosaurus wetherilli in 1954. After finding a larger skeleton with crests, he renamed it Dilophosaurus wetherilli in 1970.1
仍有爭議: Scientists still debate whether Dilophosaurus was a fast predator that attacked large prey or a scavenger that ate smaller animals. Most now think it was an active hunter.1