恐龍卡第 0473 張，共 2 027 張

Dactylosaurus

名字的意思： “finger lizard”1

吃：魚海生爬蟲類三疊紀中期嚴格來說不是恐龍

Dactylosaurus was a tiny marine reptile that swam in warm, shallow seas during the Triassic Period. It had a long body, a small head, and paddle-like limbs for moving through the water. Even though it was small, it was one of the earliest pachypleurosaurs in Europe.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

247 到 241 百萬年前3

三疊紀中期

化石發現地

Poland and the Netherlands3 1

長度

0.5 m (1.6 ft)1

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）

Dactylosaurus 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？

Dactylosaurus 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

Dactylosaurus was one of the smallest members of its family, Pachypleurosauridae, measuring only about 50 cm (1.6 ft) long.1

Its name comes from Greek words meaning 'finger lizard', because of its long, slender fingers.1

Dactylosaurus had 17 neck vertebrae and its skull had large, kidney-shaped openings behind the eyes.1

The first fossil of Dactylosaurus was a partial skeleton of a juvenile, and scientists originally thought it was a different species called D. schroederi.1

Dactylosaurus lived about 247 to 241 million years ago, during the Early and Middle Triassic.3

Its bones became hard (ossified) at a much smaller size than other pachypleurosaurs, which helped scientists identify it.2

Dactylosaurus fossils are often found in shelly limestone called Muschelkalk in Poland and the Netherlands.1

Dactylosaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Dactylosaurus 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: Dactylosaurus
命名者: Gürich 18843
類群: 海生爬蟲類
科 / 演化支: Pachypleurosauridae3
分類: Sauropterygia3
岩石的年代: 247 到 241 百萬年 ()3
岩層: Vossenveld, Karchowice, Chorzow3
國家: 波蘭, 荷蘭3
化石紀錄: The Paleobiology Database 收錄 4 筆3
發現: Dactylosaurus was named by German paleontologist Georg Gürich in 1884, based on fossils from Upper Silesia (now Poland).3 1
仍有爭議: Scientists are still unsure about the exact diet of Dactylosaurus, since its teeth and jaw shape suggest it ate small prey, but direct evidence is missing.3