恐龍卡第 1309 張，共 2 027 張

Omphalosaurus

名字的意思： “button lizard”1

吃：肉魚龍類三疊紀早期到三疊紀中期嚴格來說不是恐龍

Omphalosaurus was a marine reptile that lived in the Triassic Period, not a dinosaur. It had strange button-shaped teeth that it used to crush hard-shelled animals like ammonites. This reptile was a slow swimmer that probably sucked in its food and then ground it up.1

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

249 到 237 百萬年前3

三疊紀早期到三疊紀中期

化石發現地

Nevada, USA; Germany; Poland; Svalbard and Jan Mayen3

長度

最多 5 m (16 ft)1

體重

最多 783 kg (1,700 lb)1

最高速度

時速約 46 公里（29 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？

牠有多重？

跟 39 隻狗一樣重

跟 5 隻狗從鼻子接到尾巴一樣長跟 28 根香蕉頭尾相接一樣長跟 160 顆西瓜一樣重跟 41 個幼兒園小朋友一樣重跟 24 個小學生一樣重能在 3.9 秒內游完一座大泳池（50 公尺）

Omphalosaurus 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)

Omphalosaurus 時速約 46 公里 (29 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

Omphalosaurus means 'button lizard' because its teeth look like small buttons.1

Its teeth were arranged in a pavement-like pattern, not in neat rows like most other ichthyosaurs.2

The enamel on its teeth had a texture like an orange peel, which helped it grip and crush shells.1

Omphalosaurus had hollow ribs, which is unusual for an ichthyosaur and may have helped it float or stay buoyant.2

It lived during the Early to Middle Triassic, about 248 to 237 million years ago.3

Fossils of Omphalosaurus have been found in Nevada, Germany, Poland, and Svalbard.3

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

?How big was Omphalosaurus?

Omphalosaurus was about 5 metres (16 feet) long and weighed more than 783 kilograms (1,726 pounds).1

?What did Omphalosaurus eat?

Omphalosaurus ate hard-shelled animals like ammonites and possibly bivalves. It crushed them with its button-like teeth.1

?Where were Omphalosaurus fossils found?

Fossils have been found in the western United States, Poland, Austria, and the island of Spitsbergen off Norway.1

?When did Omphalosaurus live?

Omphalosaurus lived during the Early to Middle Triassic Period, about 248 to 237 million years ago.1

給恐龍專家

學名: Omphalosaurus
命名者: Merriam 19063
類群: 魚龍類
科 / 演化支: Omphalosauridae3
分類: Ichthyosauromorpha3
岩石的年代: 249 到 237 百萬年 ()3
岩層: Prida, Lercheck Limestone, Karchowice3
國家: 美國, 德國, 波蘭, 斯瓦巴3
化石紀錄: The Paleobiology Database 收錄 6 筆3
發現: The first Omphalosaurus fossil was found in 1902 by V. C. Osmont in Nevada, USA. It was named by John C. Merriam in 1906.1
仍有爭議: Scientists still debate whether Omphalosaurus is a true ichthyosaur or a more primitive relative, because its skull and teeth are so different from other ichthyosaurs.1