恐龍卡第 1203 張，共 2 027 張

Monoclonius

名字的意思： “single sprout”1

吃：植物角龍類白堊紀晚期

Monoclonius was a plant-eating dinosaur with a big frill on its head and a horn on its nose. It lived about 75 million years ago in what is now Montana and Alberta. Scientists are not sure if Monoclonius is really its own dinosaur or just a young version of another dinosaur called Centrosaurus.1 2

生存年代

84 到 72 百萬年前5

白堊紀晚期

化石發現地

Montana, USA and Alberta, Canada1 2

長度

4.5 到 5.5 m (15 到 18 ft)1

體重

1.8336 公噸到 2.17 公噸 (4,000 到 4,800 lb)3 4

高度

1.8 m (5.9 ft)

估計值

最高速度

時速約 33 公里（21 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 1.5 台汽車一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 31 根香蕉頭尾相接一樣長跟 110 隻狗一樣重跟 430 顆西瓜一樣重跟 2.5 整班小學生一樣重跟 5 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）

Monoclonius 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)

Monoclonius 時速約 33 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

Monoclonius was named in 1876 by the famous fossil hunter Edward Drinker Cope, just months after the Battle of the Little Bighorn.1

The name Monoclonius means 'single sprout' and refers to how its teeth grew, not to a horn. Cope thought only one set of teeth was used at a time.1

Many fossils once called Monoclonius are now thought to belong to other dinosaurs, like Centrosaurus or Styracosaurus.1

The type species is Monoclonius crassus, which means 'the fat one' in Latin.1

Monoclonius fossils have been found in the Judith River Formation in Montana and the Dinosaur Park Formation in Alberta.1 2

When Cope first described Monoclonius, he did not realize it was a horned dinosaur. He thought the skull frill was part of the breastbone.1

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

?How big was Monoclonius?

Monoclonius was up to 5 metres (16.5 feet) long and may have weighed about 2,170 kilograms (4,780 pounds).4

?What did Monoclonius eat?

Monoclonius was an herbivore, a plant eater. It probably ate cycads, palms, and other prehistoric plants with its tough, hook-like beak.4

?When did Monoclonius live?

Monoclonius lived in the Late Cretaceous period, about 76 to 73 million years ago, toward the end of the age of dinosaurs.4

?Why is Monoclonius called a nomen dubium?

Monoclonius is often considered a nomen dubium, or doubtful name, because the fossils are too incomplete or immature to be confidently matched with adult specimens. Many are thought to be young Centrosaurus.1

?Did Monoclonius have a horn on its nose?

Yes, Monoclonius had a single nose horn that pointed upwards and two smaller horns over its eyes, plus a small frill on its head.4

?Where were Monoclonius fossils found?

Monoclonius fossils have been found in Montana, USA, and Alberta, Canada.4

迷思破解王

迷思： Monoclonius means 'single horn'.

真相： Monoclonius actually means 'single sprout', referring to its teeth, not a horn. Cope named it before he knew it was a horned dinosaur.1

給恐龍專家

學名: Monoclonius
命名者: Cope 18765
類群: 角龍類
科 / 演化支: Ceratopsidae5
分類: Ornithischia > Ceratopsia > Ceratopsidae5
岩石的年代: 84 到 72 百萬年 (Campanian)5
岩層: Oldman, Judith River, Kirtland5
國家: 美國, 加拿大5
化石紀錄: The Paleobiology Database 收錄 13 筆5
發現: Edward Drinker Cope named Monoclonius in 1876 based on fossils found near the Judith River in Montana by himself and a young Charles Sternberg.1
仍有爭議: Scientists debate whether Monoclonius is a valid genus or just a mix of juvenile Centrosaurus and other ceratopsids. Many consider it a nomen dubium (doubtful name).1 2