恐龍卡第 0781 張，共 2 027 張

Hanosaurus

名字的意思： “lizard of the Han River”1

吃：肉海生爬蟲類三疊紀早期到三疊紀中期嚴格來說不是恐龍

Hanosaurus was a small marine reptile that swam in the warm, shallow seas of Early Triassic China. It had a long, slender body and four short flippers, and it likely hunted soft-bodied prey like worms or small shrimp.1 2

趣味小知識：這種海生爬蟲類在海裡游泳的時候，恐龍正在陸地上走路。大家都叫牠們恐龍，但牠們其實是爬蟲類的另一個分支。

生存年代

251 到 247 百萬年前5

三疊紀早期到三疊紀中期

化石發現地

Hubei Province, China1 3

長度

0.79 m (2.6 ft)1

最高速度

時速約 7 公里（4 英里）

游泳, 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？

跟 4 根香蕉頭尾相接一樣長能在 26 秒內游完一座大泳池（50 公尺）

Hanosaurus 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)

Hanosaurus 時速約 7 公里 (4 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 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

Hanosaurus lived about 250 to 247 million years ago, during the Early Triassic period.3

It was a basal sauropterygian, meaning it was an early relative of plesiosaurs and other famous sea reptiles.2

Its body was long and slender, with short limbs, which made it an axial swimmer, it moved by wiggling its body like a fish, not by paddling with its flippers.1 2

Hanosaurus had thick, heavy ribs (pachyostotic ribs) that probably helped it stay underwater without floating up.1

Its pelvis was very reduced, so it likely could not walk on land and spent its whole life in the water.1

The first fossil of Hanosaurus was a skull, backbone, hips, and hind legs, but no tail or front legs were found with it.1

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

?How big was Hanosaurus?

About 79.4 cm long. That is a little shorter than a 91.4 cm yardstick.1

?What did Hanosaurus eat?

It likely ate small, soft-bodied prey like worms or tiny shrimp. Its teeth and jaw muscles were suited for soft food.1 4

?Could Hanosaurus walk on land?

No, it probably could not. Its heavy ribs helped it stay underwater, and its pelvis was too weak to support its weight on land.1 2

?Is Hanosaurus a dinosaur?

No, it is a marine reptile called a sauropterygian. It is an early relative of plesiosaurs, not a dinosaur.1

給恐龍專家

學名: Hanosaurus
命名者: Young 19725
類群: 海生爬蟲類
科 / 演化支: Pachypleurosauridae5
分類: Sauropterygia5
岩石的年代: 251 到 247 百萬年 ()5
岩層: Jialingjiang5
國家: 中國5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Hanosaurus was named by Chinese paleontologist Yang Zhongjian (also known as C.C. Young) in 1972, based on a partial skeleton found in Hubei, China.1 3
仍有爭議: Scientists are still debating whether a more complete skeleton found later really belongs to Hanosaurus or to a different species.1