恐龍卡第 1771 張，共 2 027 張

Tenontosaurus

名字的意思： “sinew lizard”1

吃：植物有喙的草食恐龍白堊紀早期到白堊紀晚期

Tenontosaurus was a big plant-eating dinosaur with a very long, stiff tail. It lived in North America during the Early Cretaceous period, about 115 to 108 million years ago.1

生存年代

121 到 94 百萬年前4

白堊紀早期到白堊紀晚期

化石發現地

Fossils have been found in Montana, Wyoming, Oklahoma, Texas, Idaho, Utah, and Maryland in the USA, and also in Canada.1 2

長度

7 m (23 ft)2

體重

900 kg (2,000 lb)2

高度

2.9 到 3 m (9.5 到 9.8 ft)3

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？

牠有多重？

跟 45 隻狗一樣重

跟 7 隻狗從鼻子接到尾巴一樣長跟 39 根香蕉頭尾相接一樣長跟 180 顆西瓜一樣重跟 47 個幼兒園小朋友一樣重跟 28 個小學生一樣重跟 2 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）

Tenontosaurus 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)

Tenontosaurus 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

Tenontosaurus had an unusually long and broad tail, stiffened by a network of bony tendons, which is why it is called 'sinew lizard'.1

An adult Tenontosaurus could reach a browsing height of about 3 meters (10 feet) if it stood on its hind legs, but it usually walked on all fours.1

Its beak was U-shaped and thick, and its lower jaw had a special bone called a predentary that helped form the lower beak.1

Tenontosaurus lived alongside the predator Deinonychus, and fossils of both are common in the same rocks.1

The first Tenontosaurus fossil was found in 1903 in Montana, but it was not named until 1970.1

There are two species: Tenontosaurus tilletti and Tenontosaurus dossi. T. dossi is known from only a few specimens in Texas.1

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

?How big was Tenontosaurus?

About 6 to 8 metres long and around 1,000 kilograms, though estimates vary by species and study.1 2

?What did Tenontosaurus eat?

It was a plant-eater. It used its U-shaped beak and chopping teeth to eat leaves, wood, fruit, and low-growing ferns and shrubs.1 2

?Did Tenontosaurus walk on two legs or four?

It usually walked on all four legs, but could stand on its hind legs to reach higher plants, up to about 3 metres.1 2

?Was Tenontosaurus bigger than Deinonychus?

Yes, adult Tenontosaurus were much larger than adult Deinonychus. Deinonychus probably hunted young or sick Tenontosaurus.1

?When did Tenontosaurus live?

It lived during the Early Cretaceous period, about 115 to 108 million years ago, in western North America.1 2

?Why did Tenontosaurus have a long tail?

Its tail was unusually long and broad, stiffened by bony tendons. This helped support the tail, but scientists aren't sure of its exact purpose.1

?Where was Tenontosaurus found?

Fossils have been found in the USA (Montana, Oklahoma, Texas, Utah, Idaho, Maryland) and Canada.1 2

?Is Tenontosaurus a dinosaur?

Yes, it is a type of ornithopod dinosaur, a plant-eating dinosaur related to Iguanodon.1 2

迷思破解王

迷思： Some people think Tenontosaurus was a slow, clumsy dinosaur.

真相： Scientists think it was a common and successful herbivore, and its stiff tail may have helped it balance.1

給恐龍專家

學名: Tenontosaurus
命名者: Ostrom 19704
類群: 有喙的草食恐龍
科 / 演化支: Tenontosauridae4
分類: Ornithischia > Ornithopoda > Iguanodontia4
岩石的年代: 121 到 94 百萬年 (Aptian / Cenomanian)4
岩層: Cloverly, Antlers, Cedar Mountain4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 83 筆4
發現: The first fossil was found in 1903 by an American Museum of Natural History expedition in Montana. John Ostrom named it Tenontosaurus tilletti in 1970 after studying many specimens.1
仍有爭議: Scientists still debate exactly how Tenontosaurus moved, whether it was mostly quadrupedal or could run on two legs.1