恐龍卡第 0796 張，共 2 027 張

Henodus

名字的意思： “one tooth”1

吃：每樣都來一點海生爬蟲類三疊紀晚期嚴格來說不是恐龍

Henodus was a strange reptile that looked a bit like a turtle, but it wasn't one. It lived in shallow, salty lagoons during the Late Triassic, about 237 to 227 million years ago. It had a flat shell and a beak, and it probably used its special jaws to filter food from the water.1 3

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

237 到 227 百萬年前3

三疊紀晚期

化石發現地

Germany, near Tübingen, and also Portugal1 3

長度

1 m (3.3 ft)1

最高速度

時速約 6 公里（4 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 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能在 30 秒內游完一座大泳池（50 公尺）

Henodus 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)

Henodus 時速約 6 公里 (4 mph)

騎腳踏車的小朋友 時速約 12 公里 (7 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

Henodus is the only placodont found in rocks that were not from the open sea, so it probably lived in brackish or freshwater lagoons.1

Its shell was made of many small bony plates that formed a mosaic pattern, unlike a turtle's shell.1

Henodus had only one tooth on each side of its mouth, and the rest of its jaws were a beak.1

It had baleen-like denticles along its jaws, similar to some whales, which helped it filter small food from the water.1

Its weak limbs suggest it spent little or no time on land.1

Scientists think Henodus could close its jaws very quickly, which helped it catch small prey.1

Small snail shells were found near the skulls of Henodus, so it might have eaten those tiny snails.2

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

?How big was Henodus?

About 1 metre (3.3 feet) long.1

?What did Henodus eat?

It probably ate tiny snails, small crustaceans, and maybe plants. It had a beak and baleen-like denticles to filter food from the water.1 2

?Was Henodus a dinosaur?

No, it was a marine reptile called a placodont, not a dinosaur.1

?Could Henodus walk on land?

Probably not much. Its weak limbs suggest it spent little or no time on land.1

?When did Henodus live?

It lived during the Late Triassic period, about 237 to 227 million years ago.1

?Why did Henodus have a shell?

Its shell was made of many small bony plates that formed a mosaic pattern, and it probably protected Henodus from predators.1

迷思破解王

迷思： Henodus was a turtle.

真相： Henodus looked like a turtle, but it was a different kind of reptile called a placodont. Its shell was made of many more bones, and its limbs were not inside its ribcage like a turtle's.1

給恐龍專家

學名: Henodus
命名者: Huene 19363
類群: 海生爬蟲類
科 / 演化支: Henodontidae3
分類: Placodontia > Sauropterygia3
岩石的年代: 237 到 227 百萬年 (Carnian)3
岩層: Grabfeld3
國家: 德國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Henodus was named by Friedrich von Huene in 1936. The first fossils were found in the Grabfeld Formation near Tübingen, Germany.3 1
仍有爭議: Scientists are not sure exactly what Henodus ate. Some think it was a filter feeder, others think it ate plants, and some think it ate small animals. It might have done all of these.2