恐龍卡第 0527 張，共 2 027 張

Dolichorhynchops

名字的意思： “long-nosed face”1

吃：肉蛇頸龍類白堊紀晚期嚴格來說不是恐龍

Dolichorhynchops was a small, fast-swimming marine reptile that lived in the Late Cretaceous seas. It had a long snout and a short neck, and it used its four flippers to chase after fish and squid.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 66 百萬年前5

白堊紀晚期

化石發現地

Kansas, South Dakota, and Wyoming in the USA; Saskatchewan and Manitoba in Canada; also Poland and Russia5 1

長度

3 m (9.8 ft)1

體重

425 kg (937 lb)1

最高速度

時速約 29 公里（18 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 21 隻狗一樣重

跟 3 隻狗從鼻子接到尾巴一樣長跟 17 根香蕉頭尾相接一樣長跟 85 顆西瓜一樣重跟 22 個幼兒園小朋友一樣重跟 13 個小學生一樣重能在 6.2 秒內游完一座大泳池（50 公尺）

Dolichorhynchops 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)

Dolichorhynchops 時速約 29 公里 (18 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

Dolichorhynchops was a plesiosaur, but unlike the long-necked plesiosaurs, it had a short neck and a big head.1

The first fossil of Dolichorhynchops was found by a teenager, George Fryer Sternberg, in Kansas around 1900.1

Its name means 'long-nosed face' because of its long, narrow snout.1

Dolichorhynchops lived in the Western Interior Seaway, a shallow sea that split North America in two during the Cretaceous.1

Scientists used to think some larger specimens were a different species, but now they are placed in a separate genus called Martinectes.1 2

A 2023 study moved two other former Dolichorhynchops species into new genera: Martinectes and Scalamagnus.1 2

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

?How big was Dolichorhynchops?

Dolichorhynchops was a relatively small plesiosaur, measuring around 3 metres (9.8 ft) long. Some estimates range from 2.5 to 3 metres (8.2 to 9.8 ft).1 3

?What did Dolichorhynchops eat?

It ate fish and squid. Its long, narrow jaws were filled with sharp teeth to grab prey, which it swallowed whole.4 3

?Was Dolichorhynchops a dinosaur?

No, it was a marine reptile called a plesiosaur, not a dinosaur. It lived in the seas during the Late Cretaceous.1 4

?When did Dolichorhynchops live?

It lived during the Late Cretaceous, about 87 to 72 million years ago. Fossils are found in North America.1

?Could Dolichorhynchops swim fast?

Yes, it was a quick and agile swimmer. It used its long, paddle-like flippers to 'fly' through the water like a penguin.4

?Did Dolichorhynchops give birth to live young?

Yes, fossils have been found with unborn babies inside, strong evidence that it gave birth to live young.4

給恐龍專家

學名: Dolichorhynchops
命名者: Williston 19025
類群: 蛇頸龍類
科 / 演化支: Polycotylidae5
分類: Plesiosauria > Sauropterygia5
岩石的年代: 94 到 66 百萬年 (Turonian / Maastrichtian)5
岩層: Niobrara, Pierre Shale, Mesaverde5
國家: 美國, 加拿大, 波蘭, 俄羅斯5
化石紀錄: The Paleobiology Database 收錄 14 筆5
發現: The first specimen was found by teenage fossil hunter George Fryer Sternberg in Kansas around 1900. It was named Dolichorhynchops osborni by Samuel Wendell Williston in 1902.1
仍有爭議: Scientists still debate whether some large polycotylid specimens from Wyoming belong to Dolichorhynchops or to a different genus.1