恐龍卡第 1178 張，共 2 027 張

Microdontosaurus

名字的意思： “tiny-toothed lizard”1

吃：肉魚龍類侏羅紀中期嚴格來說不是恐龍

Microdontosaurus was a small-toothed reptile that lived in the sea during the Middle Jurassic. It swam in warm oceans and hunted for food with its tiny teeth.3 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

175 到 162 百萬年前3

侏羅紀中期

化石發現地

Fossils were found in the Dapuka Group of Xinjiang, China.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)

Microdontosaurus 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

Microdontosaurus lived about 174 to 161 million years ago, during the Middle Jurassic period.3

Its name means 'tiny-toothed lizard', because its teeth were very small.1

Scientists think it was a marine reptile, not a dinosaur, even though its name sounds like one.3

The fossils were found in rocks that were once part of a shallow sea.3

Microdontosaurus is known from only a few bones, so scientists are still unsure about many details of its life.1

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

?Was Microdontosaurus a dinosaur?

No, Microdontosaurus was a marine reptile, not a dinosaur, even though its name sounds like one.1 3

?What does Microdontosaurus mean?

Microdontosaurus means 'tiny-toothed lizard' because its teeth were very small.1 2

?How big was Microdontosaurus?

Scientists are not sure, but it was a marine reptile, though the fossils are very incomplete.3

?When did Microdontosaurus live?

Microdontosaurus lived during the Middle Jurassic, about 174 to 161 million years ago.1 3

?Where was Microdontosaurus found?

Its fossils were discovered in the Dapuka Formation of Tibet, China.1 2

?Is Microdontosaurus a real dinosaur?

It is a real animal, but its name is not officially accepted by scientists because it was never properly described.1 3

?Could Microdontosaurus swim?

Yes, it was a marine reptile that lived in the ocean.3

迷思破解王

迷思： Some people think Microdontosaurus was a dinosaur because its name ends in 'saurus'.

真相： It was actually a marine reptile that lived in the ocean, not a dinosaur.3

給恐龍專家

學名: Microdontosaurus
命名者: Zhao 19833
類群: 魚龍類
科 / 演化支: Sauropoda3
分類: Sauropodomorpha > Sauropoda > Ichthyosauria > Ichthyosauromorpha3
岩石的年代: 175 到 162 百萬年 (Aalenian / Callovian)3
國家: 中國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Microdontosaurus was named by Zhao in 1983, based on fossils from China. The type species is called M. dayensis.3
仍有爭議: Scientists debate whether Microdontosaurus is a valid genus, because the fossils are incomplete and may belong to another animal.1