恐龍卡第 0329 張，共 2 027 張

Callawayia

名字的意思： “named after ichthyosaur researcher Jack Callaway”1

吃：肉魚龍類三疊紀晚期嚴格來說不是恐龍

Callawayia was a small, fast-swimming marine reptile that lived in the Late Triassic oceans. It looked a bit like a dolphin but was actually an ichthyosaur, not a dinosaur.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

227 到 206 百萬年前3

三疊紀晚期

化石發現地

British Columbia, Canada1 3

長度

2 到 2.5 m (6.6 到 8.2 ft)1

最高速度

時速約 45 公里（28 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 隻狗從鼻子接到尾巴一樣長跟 14 根香蕉頭尾相接一樣長能在 4 秒內游完一座大泳池（50 公尺）

Callawayia 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)

Callawayia 時速約 45 公里 (28 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

Callawayia had more than 54 vertebrae in front of its hips, giving it a long, flexible body.1

Its front flippers had four digits, but its back flippers only had three.1

The first two neck vertebrae of Callawayia were not fused together, unlike in some other ichthyosaurs.1

A tiny bone called a pisiform was present in each foreflipper, which is unusual for ichthyosaurs.1

The humerus (upper arm bone) was short and wide with a notched front edge.1

Callawayia 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Callawayia 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： Callawayia is sometimes called a dinosaur.

真相： Callawayia was an ichthyosaur, a marine reptile that lived in the ocean, not a dinosaur. Dinosaurs lived on land.1

給恐龍專家

學名: Callawayia
命名者: Maisch and Matzke 20003
類群: 魚龍類
科 / 演化支: Californosauridae3
分類: Ichthyosauria > Ichthyosauromorpha3
岩石的年代: 227 到 206 百萬年 (Norian)3
岩層: Pardonet3
國家: 加拿大3
化石紀錄: The Paleobiology Database 收錄 2 筆3
發現: The first fossil was found in 1987 on the shore of Williston Lake in British Columbia, Canada. It was named Callawayia in 2000 by Michael Maisch and Andreas Matzke.1
仍有爭議: Scientists still debate whether a species from China called 'Callawayia wolonggangense' really belongs to the same genus.1