恐龍卡第 0510 張，共 2 027 張

Dianmeisaurus

名字的意思： “beautiful lizard from Dian (an old name for Yunnan, China)”1

吃：肉海生爬蟲類三疊紀中期嚴格來說不是恐龍

Dianmeisaurus was a tiny, slender marine reptile that swam in warm seas during the Middle Triassic, about 245 million years ago. It had a long body and a small head with big eyes, and it probably hunted small fish and shrimp in the water.2 3

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

247 到 241 百萬年前4

三疊紀中期

化石發現地

Luoping County, Yunnan Province, China2 3

長度

0.5 m (1.6 ft)3

最高速度

時速約 4 公里（2 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 3 根香蕉頭尾相接一樣長跟 16 塊積木排成一排一樣長能在 45 秒內游完一座大泳池（50 公尺）

Dianmeisaurus 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？

Dianmeisaurus 時速約 4 公里 (2 mph)

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)

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

Dianmeisaurus was very small, with a total body length of less than 50 centimetres (about 20 inches).3

It had 41 vertebrae in its neck and back before the hips, which is a lot for such a small reptile.3

Its eyes were very large compared to the openings behind them on the skull, helping it see in dim water.3

The space between its eyes was extremely narrow, a feature that helps scientists tell it apart from similar reptiles.2 1

Dianmeisaurus lived alongside two other small marine reptiles in the same ancient sea: Diandongosaurus and Dianopachysaurus.3

The second species, Dianmeisaurus mutaensis, was named in 2024 and its skeleton probably came from a young animal.1

Its front leg bones (the ulna) were wider at the top than at the bottom, which is unusual.3

Dianmeisaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Dianmeisaurus 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。

給恐龍專家

學名: Dianmeisaurus
命名者: Shang and Li 20154
類群: 海生爬蟲類
科 / 演化支: Pachypleurosauria4
分類: Sauropterygia4
岩石的年代: 247 到 241 百萬年 ()4
岩層: Guanling4
國家: 中國4
化石紀錄: The Paleobiology Database 收錄 2 筆4
發現: The first species, Dianmeisaurus gracilis, was named by Shang Qinghua and Li Chun in 2015 based on a nearly complete skeleton from Luoping, Yunnan, China. A second species, D. mutaensis, was added in 2024 by Hu, Li and Liu.2 1 3
仍有爭議: Scientists are still debating whether Dianmeisaurus is more closely related to European pachypleurosaurs or to the nothosauroid group of marine reptiles.3