恐龍卡第 1824 張，共 2 027 張

Traskasaura

名字的意思： “Trask lizard”1

吃：肉蛇頸龍類白堊紀晚期嚴格來說不是恐龍

Traskasaura was a long-necked marine reptile that lived in the ocean around Vancouver Island, Canada, about 85 million years ago. It was a fierce predator with strong, sharp teeth that could crush the shells of its prey. This ancient sea monster is the official fossil of British Columbia!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

86 到 84 百萬年前3

白堊紀晚期

化石發現地

Haslam Formation, Vancouver Island, British Columbia, Canada1 3

長度

10 到 12 m (33 到 39 ft)1 2

最高速度

時速約 20 公里（12 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 2.5 台汽車排成一排一樣長跟 67 根香蕉頭尾相接一樣長能在 9 秒內游完一座大泳池（50 公尺）

Traskasaura 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)

Traskasaura 時速約 20 公里 (12 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

Traskasaura had a very long neck with at least 50 bones, making it one of the longest-necked elasmosaurs.2

This marine reptile could swim downwards to dive on its prey from above, a hunting style that was unusual for elasmosaurs.2

The first Traskasaura fossil was found in 1988 by Michael Trask and his daughter Heather along the Puntledge River.1

Traskasaura was named the official Provincial Fossil of British Columbia in 2023, even before it got its scientific name.1 2

Scientists think Traskasaura had a strange mix of features from both early elasmosaurs and a later group called aristonectines.1

Three Traskasaura specimens have been found, including a nearly complete adult skeleton and a well-preserved juvenile.1

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

?How big was Traskasaura?

About 12 metres (39 feet) long. That is roughly as long as a large bus.2

?What did Traskasaura eat?

It likely ate ammonites, shelled sea creatures that lived in the same ocean. Its strong, sharp teeth were perfect for crushing their shells.2

?Is Traskasaura a dinosaur?

No, it is a plesiosaur, a type of marine reptile that lived in the sea. It is not a dinosaur.1

?When did Traskasaura live?

It lived about 85 million years ago, during the Late Cretaceous Period.1 2

給恐龍專家

學名: Traskasaura
命名者: O’Keefe et al. 20253
類群: 蛇頸龍類
科 / 演化支: Elasmosauridae3
分類: Plesiosauria > Elasmosauridae > Sauropterygia3
岩石的年代: 86 到 84 百萬年 (Santonian)3
岩層: Haslam3
國家: 加拿大3
化石紀錄: The Paleobiology Database 收錄 3 筆3
發現: The first Traskasaura skeleton was discovered in 1988 by Michael Trask and his daughter Heather on the bank of the Puntledge River near Courtenay, British Columbia. It was officially named Traskasaura sandrae in 2025 by paleontologist F. Robin O'Keefe and colleagues.1
仍有爭議: Scientists debate whether Traskasaura was a very early aristonectine or if its similar features evolved separately.1