恐龍卡第 0471 張，共 2 027 張

Daanosaurus

名字的意思： “Da'an lizard, after the Da'an district in Zigong, Sichuan, China”1

吃：植物長脖子恐龍侏羅紀晚期到白堊紀早期

Daanosaurus was a long-necked plant-eater that lived in what is now China during the Late Jurassic. It is known only from a young dinosaur, so scientists are not sure how big it grew. It was probably similar to another sauropod called Bellusaurus.1

生存年代

155 到 143 百萬年前4

侏羅紀晚期到白堊紀早期

化石發現地

Da'an district, Zigong, Sichuan Province, China1

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)

Daanosaurus 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

Daanosaurus is known only from a single juvenile skeleton, so its adult size is unknown.1

Its neck bones had deep air pockets called pleurocoels, which made the skeleton lighter.2

The neural spines on its back vertebrae were broad and plate-like, not forked like in some other sauropods.2

The front chevrons (bones under the tail) were Y-shaped and did not form a closed canal.2

Its femur was long and straight, with greatly expanded ends and a well-developed fourth trochanter for muscle attachment.2

Some scientists think Daanosaurus might actually be a young mamenchisaurid, a group of long-necked sauropods from Asia.1

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

?How big was Daanosaurus?

Nobody knows for sure because only a young skeleton has been found. Scientists think it was probably similar in size to Bellusaurus, but the adult size is unknown.1

?What did Daanosaurus eat?

It was a plant-eater, like other sauropods. Its spoon-shaped teeth were good for stripping leaves off plants.1 2

?Is Daanosaurus a dinosaur?

Yes, it is a sauropod dinosaur. It lived during the Late Jurassic in what is now China.1

迷思破解王

迷思： Daanosaurus was a giant adult sauropod like many others.

真相： The only known fossil is from a juvenile, so scientists cannot be sure how big it got as an adult.1

給恐龍專家

學名: Daanosaurus
命名者: Ye et al. 20054
類群: 長脖子恐龍
科 / 演化支: Mamenchisauridae4
分類: Sauropodomorpha > Sauropoda4
岩石的年代: 155 到 143 百萬年 (Kimmeridgian / Tithonian)4
岩層: Shaximiao4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Daanosaurus was named in 2005 by Ye Yong, Gao Yuhui, and Jiang Shan based on a juvenile skeleton found in the Upper Shaximiao Formation of Zigong, Sichuan. The species name zhangi honors Zhang Aiping, former Minister of National Defense.1
仍有爭議: Scientists debate whether Daanosaurus is a true brachiosaurid or a juvenile mamenchisaurid, because the only specimen is young and may not show all adult features.1