恐龍卡第 0526 張，共 2 027 張

Djupedalia

名字的意思： “Djupedal's lizard, named after Øystein Kåre Djupedal, a Norwegian minister who helped fund the fossil excavation”1

吃：肉蛇頸龍類侏羅紀晚期到白堊紀早期嚴格來說不是恐龍

Djupedalia was a long-necked marine reptile that swam in the warm, shallow seas near Svalbard, Norway, about 150 million years ago. It was not a dinosaur, but a plesiosaur, a type of ocean predator. With its small head and long neck, it likely snapped up fish and squid while paddling through the water.4 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

149 到 143 百萬年前4

侏羅紀晚期到白堊紀早期

化石發現地

The only known fossil was found on the northeastern slope of Janusfjellet mountain in Spitsbergen, Svalbard, Norway.4 2

長度

6 m (20 ft)3

最高速度

時速約 27 公里（17 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 6 隻狗從鼻子接到尾巴一樣長跟 33 根香蕉頭尾相接一樣長能在 6.7 秒內游完一座大泳池（50 公尺）

Djupedalia 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)

Djupedalia 時速約 27 公里 (17 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

Djupedalia is known from a single juvenile skeleton that is one of the most complete marine reptile fossils ever found in Spitsbergen.2

Its neck bones were special: the neural spines (the parts that stick up from the vertebrae) were shifted far back, and the postzygapophyses (the joints that connect vertebrae) were very long.2

Djupedalia had femora (thigh bones) that were longer than its humeri (upper arm bones), which is unusual for plesiosaurs.2

The fossil was found about 20 metres below a rock layer called the Dorsoplanites bed, which is full of ammonite shells.2

Djupedalia lived during the Tithonian age, about 150 to 145 million years ago, in the Late Jurassic period.1

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

迷思破解王

迷思： Some people might think Djupedalia was a dinosaur because it lived in the sea and had a long neck.

真相： Djupedalia was a plesiosaur, a marine reptile, not a dinosaur. Dinosaurs lived on land, while plesiosaurs swam in the ocean.4

給恐龍專家

學名: Djupedalia
命名者: Knutsen et al. 20124
類群: 蛇頸龍類
科 / 演化支: Cryptoclididae4
分類: Plesiosauria > Sauropterygia4
岩石的年代: 149 到 143 百萬年 (Tithonian)4
岩層: Agardhfjellet4
國家: 挪威4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Djupedalia was named in 2012 by Espen M. Knutsen, Patrick S. Druckenmiller, and Jørn H. Hurum. The fossil was excavated in the summer of 2009 by the University of Oslo Natural History Museum from the Slottsmøya Member near Janusfjellet mountain.2
仍有爭議: Scientists are still debating exactly how Djupedalia is related to other plesiosaurs, since it shares features with several different groups from England and other places.2