恐龍卡第 0365 張，共 2 027 張

Cedarosaurus

名字的意思： “Cedar lizard, named after the Cedar Mountain Formation where it was found”1

吃：植物長脖子恐龍白堊紀早期

Cedarosaurus was a giant, long-necked plant-eater that lived during the Early Cretaceous. It stomped through what is now Utah, USA, using its long neck to munch leaves high in the trees.1

生存年代

137 到 110 百萬年前2

白堊紀早期

化石發現地

Utah, USA, in the Cedar Mountain Formation1 2

長度

最多 15 m (49 ft)1

體重

最多 10 公噸 (22,000 lb)1

高度

3.5 m (11 ft)

估計值

最高速度

時速約 15 公里（9 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 7 台汽車一樣重

跟 3 台汽車排成一排一樣長跟 83 根香蕉頭尾相接一樣長跟 1.5 頭大象一樣重跟 2000 顆西瓜一樣重跟 12 整班小學生一樣重跟 22 隻北極熊一樣重能在 24 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Cedarosaurus 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)

Cedarosaurus 時速約 15 公里 (9 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

Cedarosaurus had a more slender arm bone (radius) than its relative Venenosaurus.1

Scientists found 115 gastroliths (stomach stones) with a Cedarosaurus skeleton. The stones weighed about 7 kilograms (15 pounds) in total.1

Most of the gastroliths were smaller than 10 millilitres in volume, and the largest one weighed 715 grams (25.2 ounces).1

The gastroliths were mostly made of chert, with some sandstone, siltstone, and quartzite. Some even contained tiny fossils inside.1

Cedarosaurus is a brachiosaurid, meaning it is related to the famous Brachiosaurus.1 2

Its middle tail vertebrae have neural spines that point forward when the bones are lined up, a feature also seen in some other sauropods like Gondwanatitan.1

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

?How big was Cedarosaurus?

About 15 metres (49 feet) long and weighed up to 10 metric tons (11 short tons). That is roughly as long as a bus and as heavy as two elephants.1

?What did Cedarosaurus eat?

It was a plant-eater that used its long neck to reach leaves high in trees. It also swallowed gastroliths (stomach stones) to help grind up the tough plants inside its belly.1

?When did Cedarosaurus live?

It lived during the Early Cretaceous Period, about 139 to 134 million years ago.1

?Where was Cedarosaurus found?

Its fossils were discovered in 1996 in eastern Utah, USA, in the Cedar Mountain Formation.1

給恐龍專家

學名: Cedarosaurus
命名者: Tidwell et al. 19992
類群: 長脖子恐龍
科 / 演化支: Brachiosauridae2
分類: Sauropodomorpha > Sauropoda > Macronaria2
岩石的年代: 137 到 110 百萬年 (Valanginian / Albian)2
岩層: Cedar Mountain, Paluxy2
國家: 美國2
化石紀錄: The Paleobiology Database 收錄 3 筆2
發現: Cedarosaurus was named in 1999 by Virginia Tidwell, Kenneth Carpenter, and William Brooks. The fossils were found in 1996 in eastern Utah, USA.1 2
仍有爭議: Scientists are not sure exactly how Cedarosaurus used its gastroliths. Some stones were large and irregular, which might have been hard to swallow, so they may have been swallowed by accident.1