恐龍卡第 1042 張，共 2 027 張

Lewisuchus

名字的意思： “named after Arnold D. Lewis, the preparator who found the skeleton, plus the Greek word 'soûkhos' for crocodile”1

吃：植物有喙的草食恐龍三疊紀中期到三疊紀晚期

Lewisuchus was a small, early dinosaur relative that lived around 236 million years ago. It walked on two legs and had a beak, which it used to eat plants. This reptile is one of the closest known relatives of true dinosaurs.1 3

生存年代

241 到 234 百萬年前3

三疊紀中期到三疊紀晚期

化石發現地

Argentina (La Rioja Province)1 3

長度

1 m (3.3 ft)1

高度

0.33 m (1.1 ft)

估計值

最高速度

時速約 25 公里（16 英里）

跑步, 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？

牠有多高？

估計值

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小到能從椅子底下走過去能在 14 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Lewisuchus 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)

Lewisuchus 時速約 25 公里 (16 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

Lewisuchus had a row of bony plates called osteoderms along its back, which may have helped protect it.1

Its full scientific name is Lewisuchus admixtus, and 'admixtus' means 'mixed', because its skeleton was found mixed with bones of other animals.1

Scientists once called it Pseudolagosuchus, but later realized those fossils came from the same type of animal.1 3

The first skeleton was discovered inside a hard rock nodule in Argentina during a 1964 to 1965 expedition.1

Lewisuchus lived during the Late Triassic Period, when the first dinosaurs were just appearing.1 3

It was about 1 meter (3.3 feet) long, about the size of a large dog.1

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

?Is Lewisuchus a dinosaur?

No, it is not a dinosaur. It is a silesaurid dinosauriform, one of the closest relatives of dinosaurs.1

?Where was Lewisuchus found?

In the Chañares Formation of Argentina.1

?Did Lewisuchus have teeth?

Yes, it had small, serrated teeth in its upper and lower jaws.1 2

?How did Lewisuchus get its name?

It means 'Lewis's crocodile'. The name honors Arnold Lewis, who discovered the skeleton, and references the Egyptian crocodile god Sobek.1

迷思破解王

迷思： Some people think Lewisuchus was a true dinosaur.

真相： Scientists now place Lewisuchus in the group Silesauridae, which are close relatives of dinosaurs but not necessarily true dinosaurs themselves.1

給恐龍專家

學名: Lewisuchus
命名者: Romer 19723
類群: 有喙的草食恐龍
科 / 演化支: Silesauridae3
分類: Ornithischia3
岩石的年代: 241 到 234 百萬年 (Ladinian / Carnian)3
岩層: Chañares3
國家: 阿根廷3
化石紀錄: The Paleobiology Database 收錄 4 筆3
又名: Pseudolagosuchus （舊名稱現在也算作同一種動物）3
發現: Alfred Romer named Lewisuchus in 1972, based on a partial skeleton found in the Chañares Formation of Argentina. The holotype specimen is stored at the Museo de La Plata and later moved to the National University of La Rioja.1 3
仍有爭議: Scientists still debate whether Lewisuchus should be classified as a true dinosaur or as a close dinosaur relative.1