恐龍卡第 1687 張，共 2 027 張

Smitanosaurus

名字的意思： “smith lizard”1

吃：植物長脖子恐龍侏羅紀晚期

Smitanosaurus was a long-necked dinosaur that lived in what is now Colorado during the Late Jurassic. It was a plant-eater with a small head and a long tail.1 4

生存年代

152 到 145 百萬年前4

侏羅紀晚期

化石發現地

Felch Quarry 1, Garden Park, Colorado, USA4

長度

最多 22 m (72 ft)3

體重

最多 17 公噸 (37,500 lb)3

高度

4.9 m (16 ft)

估計值

最高速度

時速約 13 公里（8 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 頭大象一樣重

跟 5 台汽車排成一排一樣長跟 120 根香蕉頭尾相接一樣長跟 11 台汽車一樣重跟 3400 顆西瓜一樣重跟 21 整班小學生一樣重跟 38 隻北極熊一樣重高到能從 2 樓的窗戶往裡看能在 28 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Smitanosaurus 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)

Smitanosaurus 時速約 13 公里 (8 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

Smitanosaurus was named in 2020, making it a relatively new dinosaur discovery.1 4

Its fossils were originally called Morosaurus agilis by Othniel Charles Marsh in 1889.1

The name Smitanosaurus honors J. August Smith, who dug up and drew the first fossils, and the Smithsonian Institution where the bones are kept.1

Smitanosaurus belongs to a group of sauropods called dicraeosaurids, which had shorter necks than many other sauropods.1

Only a partial skull, some neck bones, and other small pieces have been found so far.1 2

It lived in the Morrison Formation, a famous fossil site that also produced dinosaurs like Stegosaurus and Allosaurus.1 4

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

?How big was Smitanosaurus?

Scientists are not sure because only a partial skull and a few neck bones have been found. It was a sauropod, so it was probably large, but no exact size estimate is known.1

?What did Smitanosaurus eat?

It was a plant-eater, like all sauropods. It ate plants with its small head and long neck.1

?When did Smitanosaurus live?

It lived during the Late Jurassic, about 155.7 to 145.5 million years ago.1

?Where was Smitanosaurus found?

Its fossils were found in the Morrison Formation in Colorado, USA, at a site called Felch Quarry 1 in Garden Park.1 4

給恐龍專家

學名: Smitanosaurus
命名者: Whitlock and Wilson Mantilla 20204
類群: 長脖子恐龍
科 / 演化支: Dicraeosauridae4
分類: Sauropodomorpha > Sauropoda > Diplodocoidea4
岩石的年代: 152 到 145 百萬年 (Kimmeridgian / Tithonian)4
岩層: Morrison4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The first fossils were found in 1883 in Colorado and named Morosaurus agilis by Othniel Charles Marsh in 1889. In 2020, scientists Whitlock and Wilson Mantilla gave it the new name Smitanosaurus after studying the bones more closely.1 2
仍有爭議: Scientists are still debating exactly how Smitanosaurus is related to other dicraeosaurids, because its fossils are incomplete.1 2