恐龍卡第 1617 張，共 2 027 張

Segisaurus

名字的意思： “Segi Canyon lizard”1

吃：肉肉食恐龍侏羅紀早期

Segisaurus was a tiny, speedy meat-eater that lived in sandy deserts. It was about the size of a goose and probably snapped up insects and small prey. It is the only dinosaur ever found in its area of Arizona.2 1

生存年代

193 到 175 百萬年前3

侏羅紀早期

化石發現地

Tsegi Canyon, Arizona, USA2 1

長度

1 到 1.5 m (3.3 到 4.9 ft)2 1

體重

4 kg 到 7 kg (9 到 15 lb)2

高度

0.5 m (1.6 ft)2

最高速度

時速約 31 公里（19 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？

牠有多重？

跟 2 隻家貓一樣重

跟 3 隻家貓從鼻子接到尾巴一樣長跟 8 根香蕉頭尾相接一樣長大約跟一隻家貓一樣重跟 58 根香蕉一樣重能在 12 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Segisaurus 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)

Segisaurus 時速約 31 公里 (19 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

Segisaurus had a wishbone, called a furcula, just like birds do. This was one of the first times such a bone was found in a non-bird dinosaur.2

Its bones were first thought to be solid, but a 2005 study showed they were actually hollow, like other theropods.2

The only known fossil was found by a Navajo man named Max Littlesalt in 1933, who was keeping livestock in the canyon.2

Segisaurus lived in an environment like modern sand dunes, and its fossil was buried in sandstone.2

It had a long tail and long forearms, and its legs were powerful and long compared to its body.2

Scientists think Segisaurus was closely related to Coelophysis, but it had some unusual features that made them question that at first.2

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

?How big was Segisaurus?

Segisaurus was about 1 metre (3.3 feet) long, half a metre (1.65 feet) tall, and weighed about 4 to 7 kilograms. That is roughly the size of a goose.2

?What did Segisaurus eat?

Segisaurus was a meat-eater, probably eating insects and small prey. It may also have scavenged meat.2 1

?When did Segisaurus live?

Segisaurus lived during the Early Jurassic period, about 200 to 174 million years ago.2

?Did Segisaurus have feathers?

The sources do not mention feathers on Segisaurus. It did have a wishbone, or furcula, like birds, which is a feature linked to birds.2

?Was Segisaurus a dinosaur?

Yes, Segisaurus was a small theropod dinosaur, a meat-eating dinosaur that walked on two legs.2 1

?Where was Segisaurus found?

The only Segisaurus fossil was found in Tsegi Canyon, Arizona, in the Navajo Sandstone. It was discovered by Max Littlesalt in 1933.2

迷思破解王

迷思： Some people thought Segisaurus had solid bones and might not be a true theropod.

真相： A 2005 re-examination showed its bones were hollow, and it is firmly classified as a coelophysoid theropod.2

給恐龍專家

學名: Segisaurus
命名者: Camp 19363
類群: 肉食恐龍
科 / 演化支: Coelophysidae3
分類: Theropoda > Coelophysoidea3
岩石的年代: 193 到 175 百萬年 (Pliensbachian / Toarcian)3
岩層: Navajo Sandstone3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 2 筆3
發現: The fossil was discovered in 1933 by Max Littlesalt in Tsegi Canyon, Arizona. Paleontologist Charles Lewis Camp described and named it in 1936.2 1
仍有爭議: Because only a sub-adult skeleton has been found, scientists are not sure how big a full-grown Segisaurus could get.2