恐龍卡第 1184 張，共 2 027 張

Mierasaurus

名字的意思： “Bernardo de Miera's lizard, after the Spanish cartographer Bernardo de Miera y Pacheco”1 2

吃：植物長脖子恐龍白堊紀早期

Mierasaurus was a giant long necked plant eater that lived in what is now Utah, USA. It was one of the last survivors of an older group of sauropods, the turiasaurs, that were once only known from Europe. Its fossils are some of the most complete sauropod remains ever found in North America.1 2

生存年代

139 到 133 百萬年前5

白堊紀早期

化石發現地

Doelling's Bowl, Grand County, east central Utah, USA5 1 2

長度

11.5 m (38 ft)3

體重

4.8 公噸 (10,600 lb)3

高度

2.8 m (9.2 ft)

估計值

最高速度

時速約 19 公里（12 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 3 台汽車一樣重

跟 2.5 台汽車排成一排一樣長跟 64 根香蕉頭尾相接一樣長大約跟一頭大象一樣重跟 960 顆西瓜一樣重跟 6 整班小學生一樣重跟 11 隻北極熊一樣重能在 19 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Mierasaurus 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)

Mierasaurus 時速約 19 公里 (12 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

Mierasaurus is named after Bernardo de Miera y Pacheco, the first European scientist to explore Utah in 1776.1 2

Its fossils were dug up from a huge bone bed covering about 5,000 square meters, like almost one and a half football fields.2

Mierasaurus is a turiasaur, a group of sauropods that scientists thought lived only in Europe until this dinosaur was found in North America.1

The type specimen is a subadult, because some bones like the vertebrae were not fully fused together.1

The Doelling's Bowl site has also produced bones of an iguanodont dinosaur and a spiky armored ankylosaur.1

Mierasaurus lived during the Early Cretaceous, about 136 to 132 million years ago.2 5

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

?How big was Mierasaurus?

Scientists do not know its exact size yet, but it was a large sauropod. The only known skeleton is from a subadult, so it was still growing when it died.2 4

?What did Mierasaurus eat?

Mierasaurus was a plant eater. It had heart-shaped teeth that helped it strip leaves from plants.2

?Where was Mierasaurus found?

Its fossils were found in east-central Utah, USA, at a site called Doelling's Bowl in the Cedar Mountain Formation.2 4

?Is Mierasaurus a dinosaur?

Yes, Mierasaurus is a dinosaur. It is a type of sauropod, which is a long-necked, plant-eating dinosaur.2

給恐龍專家

學名: Mierasaurus
命名者: Royo-Torres et al. 20175
類群: 長脖子恐龍
科 / 演化支: Turiasauria5
分類: Sauropodomorpha > Sauropoda5
岩石的年代: 139 到 133 百萬年 (Berriasian / Valanginian)5
岩層: Cedar Mountain5
國家: 美國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Mierasaurus was named and described in 2017 by Rafael Royo-Torres and colleagues. They studied a mostly complete skeleton dug up at Doelling's Bowl in eastern Utah, USA, during excavations by the Utah Geological Survey starting in 2005.1 2
仍有爭議: Scientists are not sure exactly how big Mierasaurus grew, because the only known skeleton is from a subadult that had not finished growing.1