恐龍卡第 1371 張，共 2 027 張

Paralitherizinosaurus

名字的意思： “near Therizinosaurus of Japan”1

吃：植物奇特的羽毛恐龍白堊紀晚期

Paralitherizinosaurus was a strange, plant-eating dinosaur with long, curved claws on its hands. It lived near the coast of ancient Japan and used its claws to pull leaves and branches toward its mouth. This dinosaur was covered in feathers and looked a bit like a giant, slow-moving bird.1 4

生存年代

84 到 72 百萬年前4

白堊紀晚期

化石發現地

Hokkaido Prefecture, Japan1 4

長度

3.6 m (12 ft)2

體重

280 kg (617 lb)2

高度

1.5 m (4.9 ft)

估計值

最高速度

時速約 28 公里（17 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 14 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 20 根香蕉頭尾相接一樣長跟 56 顆西瓜一樣重跟 15 個幼兒園小朋友一樣重跟 9 個小學生一樣重能在 13 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Paralitherizinosaurus 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)

Paralitherizinosaurus 時速約 28 公里 (17 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

Paralitherizinosaurus is the youngest therizinosaur ever found in Japan, living about 83 to 72 million years ago.1

Its fossils were discovered in a marine rock layer, meaning it lived near the coast and its body washed out to sea after death.1

Only a partial hand and a single vertebra have been found, but those bones show it had very slender, curved claws like its relative Therizinosaurus.1

The first bone of its thumb (metacarpal I) was flattened from top to bottom, a unique feature that helps scientists tell it apart from other dinosaurs.1

Its claws had weak flexor tubercles (the bump where a muscle attaches), which means it used a hook-and-pull motion to bring branches to its mouth, not to slash or stab.1

Paralitherizinosaurus is one of the few therizinosaurs found in marine sediments anywhere in the world, along with Nothronychus from North America.1

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

?What did Paralitherizinosaurus eat?

It was a plant-eater. It used its long, curved claws to hook and pull leaves and branches toward its mouth.1

?How big was Paralitherizinosaurus?

Nobody knows for sure because only a partial hand and a neck bone have been found. It was probably medium-sized, but its exact size is unknown.3

?Did Paralitherizinosaurus have feathers?

Yes, it was a feathered theropod dinosaur, related to other feathered dinosaurs like Therizinosaurus. It probably looked like a big, slow-moving bird.3

?When did Paralitherizinosaurus live?

It lived during the late Cretaceous period, about 83 to 72 million years ago, making it the youngest therizinosaur from Japan.3 1

給恐龍專家

學名: Paralitherizinosaurus
命名者: Kobayashi et al. 20224
類群: 奇特的羽毛恐龍
科 / 演化支: Therizinosauridae4
分類: Theropoda > Therizinosauria4
岩石的年代: 84 到 72 百萬年 (Campanian)4
岩層: Osoushinai4
國家: 日本4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The first fossils of Paralitherizinosaurus were found in a concretion (a hard rock nodule) near a river in Hokkaido, Japan. Scientists Murakami and colleagues first described the bones in 2008, but it was not until 2022 that Kobayashi and his team named it as a new species.1
仍有爭議: Scientists are not sure exactly where Paralitherizinosaurus fits on the therizinosaur family tree. It might be closely related to Therizinosaurus, Suzhousaurus, and another unnamed form from the Bissekty Formation, but the relationships are still debated.1