恐龍卡第 0008 張，共 2 027 張

Abrictosaurus

名字的意思： “wakeful lizard”1 2

吃：每樣都來一點有喙的草食恐龍侏羅紀早期

Abrictosaurus was a tiny, speedy dinosaur that munched on plants in the Early Jurassic. It had a beak at the front of its mouth and different kinds of teeth, kind of like we do. Scientists named it 'wakeful lizard' because they disagreed about whether it slept through dry seasons.1 2

生存年代

201 到 193 百萬年前4

侏羅紀早期

化石發現地

Lesotho and South Africa1 4

長度

1.2 m (3.9 ft)1 2

體重

12 kg 到 45 kg (26 到 99 lb)1 2

高度

0.4 m (1.3 ft)2

最高速度

時速約 40 公里（25 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 隻狗一樣重

跟 2.5 隻家貓從鼻子接到尾巴一樣長跟 7 根香蕉頭尾相接一樣長跟 11 隻家貓一樣重跟 9 顆西瓜一樣重跟 2.5 個幼兒園小朋友一樣重跟 1.5 個小學生一樣重小到能從椅子底下走過去能在 9 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Abrictosaurus 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)

Abrictosaurus 時速約 40 公里 (25 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

Abrictosaurus is known from only two fossils: a partial skull and skeleton, plus a fragmentary skull.1

Unlike some relatives, its cheek teeth were widely spaced with low crowns, more like early ornithischians.1

One fossil had impressive tusks: an upper one 10.5 mm tall and a lower one 17 mm tall, serrated only on the front edge.1

It lived in a hot, half-dry environment with sand dunes and seasonal floods, alongside dinosaurs like Massospondylus and Heterodontosaurus.1

The first scientist who described it thought the tusks were just in males, so he called the female fossil 'consors', meaning partner or spouse.1 2

Abrictosaurus had small, weak forelimbs with only four finger bones in the fourth and fifth fingers, fewer than its relative Heterodontosaurus.1

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

?How big was Abrictosaurus?

About 1.2 metres (3.9 feet) long and weighed less than 45 kilograms (99 pounds). That is about as long as a small bicycle.1 2

?What did Abrictosaurus eat?

It was a herbivore or omnivore, meaning it mostly ate plants but may have eaten small animals too. It had a beak for cropping plants and different kinds of teeth for chewing.1 3

?Did Abrictosaurus have tusks?

Yes, one of the two known fossils had impressive tusks: an upper one 10.5 mm tall and a lower one 17 mm tall, serrated only on the front edge. The other fossil lacked tusks, which may mean it was a female or a juvenile.1 2

?When did Abrictosaurus live?

It lived during the Early Jurassic Period, about 200 to 190 million years ago. That is long before the famous T. rex.1

迷思破解王

迷思： Some people think Abrictosaurus had no tusks because it was female.

真相： Abrictosaurus did have tusks. One fossil shows clear upper and lower tusks, but they are serrated only on the front, unlike relatives that have serrations on both sides.1

給恐龍專家

學名: Abrictosaurus
命名者: Hopson 19754
類群: 有喙的草食恐龍
科 / 演化支: Heterodontosauridae4
分類: Ornithischia > Heterodontosauridae4
岩石的年代: 201 到 193 百萬年 (Hettangian / Sinemurian)4
岩層: Elliot4
國家: 賴索托4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The first fossil was found in Lesotho and named Lycorhinus consors by Richard Thulborn in 1974. In 1975, James Hopson gave it the new genus name Abrictosaurus after studying another skull from South Africa.1 2
仍有爭議: Scientists are still debating whether Abrictosaurus is really a different genus from Lycorhinus and Heterodontosaurus. Some think all three might just be species of Lycorhinus.1