恐龍卡第 0310 張，共 2 027 張

Brontomerus

名字的意思： “thunder thigh”1

吃：植物長脖子恐龍白堊紀早期

Brontomerus was a long-necked sauropod dinosaur with the biggest thigh muscles of any sauropod. Its name means 'thunder thigh' because its legs were so powerful. It lived about 110 million years ago in what is now Utah, USA.1

生存年代

121 到 100 百萬年前3

白堊紀早期

化石發現地

Hotel Mesa Quarry, Grand County, Utah, USA3 1

長度

4.5 到 14 m (15 到 46 ft)1

體重

200 kg 到 6 公噸 (441 到 13,200 lb)1

最高速度

時速約 28 公里（17 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？

牠有多重？

跟 4 台汽車一樣重

跟 3 台汽車排成一排一樣長跟 78 根香蕉頭尾相接一樣長大約跟一頭大象一樣重跟 1200 顆西瓜一樣重跟 8 整班小學生一樣重跟 13 隻北極熊一樣重能在 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Brontomerus 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)

Brontomerus 時速約 28 公里 (17 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

Brontomerus had a hip bone that was very deep and had a front part much larger than the back part. This gave it the largest leg muscles of any sauropod.1

Scientists think Brontomerus used its powerful thigh muscles to kick predators or to walk over rough, hilly ground.1

The fossils were found in 1994 and 1995, but some bones had been stolen by private collectors. The remaining bones were even used to hold down a plastic tarp.1

Only two partial skeletons are known: one from a juvenile and one from a much larger adult. The adult may have been the mother of the juvenile.1

Brontomerus lived during the Early Cretaceous period, about 110 million years ago, in what is now Utah.1

The species name Brontomerus mcintoshi honors John Stanton McIntosh, a physicist and expert on North American sauropods.1

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

?How big was Brontomerus?

The adult Brontomerus was about 14 meters (46 feet) long and weighed around 6 tonnes. The juvenile was about 4.5 meters (15 feet) long and weighed about 200 kilograms.1

?What did Brontomerus eat?

Brontomerus was a sauropod, so it was a plant-eating dinosaur. It likely ate plants like ferns and trees.1 2

?Why did Brontomerus have big thighs?

Scientists think Brontomerus used its powerful thigh muscles to kick predators like Utahraptor, or to walk over rough, hilly ground. The muscles were probably not for running fast.1 2

?Was Brontomerus bigger than T. rex?

Brontomerus was about 14 meters (46 feet) long, which is longer than a T. rex, but T. rex was heavier and more bulky. Brontomerus was a long-necked plant-eater, not a predator.1

迷思破解王

迷思： Some people think Brontomerus was a fast runner because of its big leg muscles.

真相： Scientists say the muscles were placed to move the leg forward powerfully or to kick, not for speed. The dinosaur probably used them for kicking or walking on rough terrain.1

給恐龍專家

學名: Brontomerus
命名者: Taylor et al. 20113
類群: 長脖子恐龍
科 / 演化支: Somphospondyli3
分類: Sauropodomorpha > Sauropoda > Macronaria3
岩石的年代: 121 到 100 百萬年 (Aptian / Albian)3
岩層: Cedar Mountain3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Brontomerus was named in 2011 by Michael P. Taylor, Mathew J. Wedel, and Richard L. Cifelli. The fossils were collected from the Hotel Mesa Quarry in Utah in 1994 and 1995.1 3
仍有爭議: Scientists are not sure exactly how Brontomerus used its huge thigh muscles. It might have kicked predators, walked on steep hills, or even stood on two legs for a short time.1