恐龍卡第 1385 張，共 2 027 張

Paronychodon

名字的意思： “beside claw tooth”1

吃：肉肉食恐龍侏羅紀晚期到白堊紀晚期

Paronychodon was a small, meat-eating dinosaur that lived during the Late Cretaceous. It is known only from its teeth, which are shaped like tiny, curved daggers with ridges. Scientists are not sure exactly what kind of dinosaur it was, but they think it might have been a fast, feathered hunter.1 4

生存年代

155 到 66 百萬年前4

侏羅紀晚期到白堊紀晚期

化石發現地

United States (Montana, North Dakota, South Dakota, Wyoming, Colorado, New Mexico, Texas, Utah), Canada (Alberta), Romania, Spain, Portugal, France, Austria, Japan, Russia, Uzbekistan4

長度

1.6 m (5.2 ft)3

體重

13 kg (29 lb)3

高度

0.56 m (1.8 ft)

估計值

最高速度

時速約 39 公里（24 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

牠有多重？

跟 3 隻家貓一樣重

跟 3 隻家貓從鼻子接到尾巴一樣長跟 9 根香蕉頭尾相接一樣長跟 110 根香蕉一樣重能在 9.2 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Paronychodon 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)

Paronychodon 時速約 39 公里 (24 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

Paronychodon is known only from its teeth, which are about 1 to 2 centimeters long. No other bones have been found, so scientists call it a 'tooth taxon'.1 2

The teeth of Paronychodon have a D-shaped cross-section, with one flat side and one convex side. They also have low ridges running up the crown.1

When Edward Drinker Cope first named Paronychodon in 1876, he thought the tooth came from a plesiosaur, a marine reptile. He changed his mind later that year and said it was a carnivorous dinosaur.1

Paronychodon teeth have been found in rocks that are between 75 and 66 million years old, from the Campanian to the Maastrichtian stages of the Late Cretaceous.1 4

Some scientists think Paronychodon might be a troodontid, a group of small, bird-like dinosaurs. Others think it could be a dromaeosaurid, like Velociraptor.1

A second species, Paronychodon caperatus, was originally thought to be a mammal tooth and named Tripriodon by Othniel Charles Marsh in 1889.1

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

?How big was Paronychodon?

Nobody knows for sure, because only teeth have been found. The teeth are about 1 to 2 centimeters long, so it was probably a small dinosaur.1 2

?What did Paronychodon eat?

It was a meat-eater. Its teeth are shaped like tiny curved daggers, so it probably ate small animals.1

?Did Paronychodon have feathers?

Scientists think it might have been a fast, feathered hunter, but no feathers have been found because only teeth are known.1

?Is Paronychodon a dinosaur?

Yes, it is a theropod dinosaur. It lived during the Late Cretaceous, about 75 to 66 million years ago.1 4

迷思破解王

迷思： Paronychodon is a well-known dinosaur with a full skeleton.

真相： Paronychodon is only known from teeth. No skeleton has ever been found, so scientists are not sure what the rest of the animal looked like.1

給恐龍專家

學名: Paronychodon
命名者: Cope 18764
類群: 肉食恐龍
科 / 演化支: Paraves4
分類: Theropoda4
岩石的年代: 155 到 66 百萬年 (Kimmeridgian / Maastrichtian)4
岩層: Hell Creek, Oldman, Dinosaur Park4
國家: 美國, 加拿大, 羅馬尼亞, 西班牙, 烏茲別克, 葡萄牙4
化石紀錄: The Paleobiology Database 收錄 141 筆4
又名: Euronychodon, Tripriodon （舊名稱現在也算作同一種動物）4
發現: Paronychodon was named by Edward Drinker Cope in 1876 based on a single tooth from the Judith River Formation in Montana, USA. The tooth is specimen AMNH 3018.1 4
仍有爭議: Scientists are not sure which group of theropod dinosaurs Paronychodon belongs to. It has been classified as a coelurid, ornithomimosaur, dromaeosaurid, archaeopterygid, and troodontid at different times.1