恐龍卡第 0481 張，共 2 027 張

Dallasaurus

名字的意思： “Dallas lizard”1

吃：肉滄龍類白堊紀晚期嚴格來說不是恐龍

Dallasaurus was a small, ancient marine lizard that lived in the sea about 92 million years ago. It could walk on land too, like a modern seal, because its legs were not yet flippers.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

94 到 90 百萬年前4

白堊紀晚期

化石發現地

Dallas County, Texas, USA1

長度

1 m (3.3 ft)1

最高速度

時速約 12 公里（7 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 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長能在 15 秒內游完一座大泳池（50 公尺）

Dallasaurus 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)

Dallasaurus 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

Dallasaurus is one of the oldest mosasaurs found in North America, living about 92 million years ago.1

It was small for a mosasaur, only about 1 meter (3.3 feet) long, much smaller than later giant mosasaurs.1

Dallasaurus had legs that could still walk on land, so it lived both in the water and on shore, like a seal.1

Its fossils were found in a housing construction site in Texas, and the site is now covered by buildings.1

The species name turneri honors amateur fossil collector Van Turner, who found the first specimen.1

Dallasaurus is a close relative of later, fully marine mosasaurs that had flippers instead of legs.3

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

?Was Dallasaurus a dinosaur?

No, Dallasaurus was a marine lizard, not a dinosaur. It was a mosasauroid, a type of ancient reptile that lived in the sea.1

?How big was Dallasaurus?

Dallasaurus was small, only about 1 metre (3.3 feet) long. That is much smaller than later giant mosasaurs.1

?Could Dallasaurus walk on land?

Yes, Dallasaurus could walk on land. Its legs were not yet flippers, so it lived an amphibious lifestyle like a modern seal.1

?What did Dallasaurus eat?

The sources do not say exactly what Dallasaurus ate. As a small marine lizard, it probably ate small fish and other sea creatures.1

?When did Dallasaurus live?

Dallasaurus lived about 92 million years ago during the Cretaceous Period. It is one of the oldest mosasaurs found in North America.1

?Where was Dallasaurus found?

Its fossils were found in Dallas County, Texas, at a housing construction site. The site is now covered by buildings.1

給恐龍專家

學名: Dallasaurus
命名者: Bell and Polcyn 20054
類群: 滄龍類
科 / 演化支: Mosasauridae4
分類: Mosasauroidea4
岩石的年代: 94 到 90 百萬年 (Turonian)4
岩層: Kamp Ranch Limestone4
國家: 美國4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Dallasaurus was named in 2005 by scientists Bell and Polcyn based on two partial skeletons found in Dallas County, Texas. The first skeleton was discovered by amateur collector Van Turner.1 2