恐龍卡第 0669 張，共 2 027 張

Franconiasaurus

名字的意思： “Franconia lizard, named after the Franconia region in Bavaria, Germany, where it was found”1

吃：肉蛇頸龍類侏羅紀早期嚴格來說不是恐龍

Franconiasaurus was a marine reptile that swam in the seas of what is now Germany about 175 million years ago. It had a mix of features from early and later plesiosaurs, making it a special link in their family tree.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

180 到 175 百萬年前4

侏羅紀早期

化石發現地

Bavaria, Germany, specifically in the Mistelgau fossil pit in the Bayreuth District1

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)

Franconiasaurus 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

Franconiasaurus lived about 175 million years ago, during a time called the late Toarcian stage of the Jurassic period.2

Its name 'brevispinus' means 'short spine', because the neural spines on its neck and back bones were low.1

Two nearly complete, three-dimensionally preserved skeletons were found, which is very rare for plesiosaurs.1

Franconiasaurus is considered a 'transitional' plesiosaur, meaning it had features of both early and later plesiosaurs, helping scientists understand how they evolved.2

It was a close relative of a group called Cryptoclidia, which includes many later plesiosaurs that lived in oceans around the world.2

The fossils were found in the Jurensismergel Formation, which is a layer of rock from the Jurassic period.1

Franconiasaurus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Franconiasaurus 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: Franconiasaurus
命名者: Sachs et al. 20244
類群: 蛇頸龍類
科 / 演化支: Plesiosauroidea4
分類: Plesiosauria > Sauropterygia4
岩石的年代: 180 到 175 百萬年 (Toarcian)4
岩層: Jurensismergel4
國家: 德國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Franconiasaurus was named by Sachs and colleagues in 2024. The fossils were dug up between 2005 and 2018 by a team from the Urwelt-Museum Oberfranken in a clay pit in Mistelgau, Germany.1
仍有爭議: Scientists are still studying the detailed anatomy of Franconiasaurus, and a full description is planned for a future project.1