恐龍卡第 1382 張，共 2 027 張

Paraxenisaurus

名字的意思： “strange lizard”1

Paraxenisaurus was a large, ostrich-like dinosaur that lived in Mexico during the Late Cretaceous. It had long legs and a stiff tail, and it probably used its clawed hands to grab plants or small animals.1

生存年代

84 到 72 百萬年前3

白堊紀晚期

化石發現地

Coahuila, Mexico1

長度

5.7 m (19 ft)1

體重

600 kg (1,300 lb)1

高度

2.3 m (7.5 ft)

估計值

最高速度

時速約 53 公里（33 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 30 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 32 根香蕉頭尾相接一樣長跟 120 顆西瓜一樣重跟 32 個幼兒園小朋友一樣重跟 19 個小學生一樣重能在 6.8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Paraxenisaurus 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)

Paraxenisaurus 時速約 53 公里 (33 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

Paraxenisaurus is the only member of its family, Deinocheiridae, known from the ancient continent of Laramidia.1

Its tail was very long and stiff, with little up-and-down movement, unlike many other ornithomimosaurs.1

It still had a first toe, a feature lost in many other ornithomimosaurs.1

The species name 'normalensis' honors the Benemérita Normal School of Coahuila, where the fossils are kept.1

Its fossils were found in rocks that were once a coastal floodplain with rivers and forests.1

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

?How big was Paraxenisaurus?

It was about 5.7 metres (19 feet) long and weighed around 600 kilograms (1,300 pounds). That's roughly as big as a close relative called Beishanlong.1

?What did Paraxenisaurus eat?

It was probably an herbivore or omnivore, meaning it ate plants and maybe small animals. It had clawed hands that could grab food.3

?When did Paraxenisaurus live?

It lived during the Late Cretaceous Period, about 72 to 66 million years ago.1

?Where was Paraxenisaurus found?

Its fossils were found in the Cerro del Pueblo Formation in Coahuila, Mexico. That area was once a coastal floodplain with rivers and forests.1

給恐龍專家

學名: Paraxenisaurus
命名者: Serrano-Brañas et al. 20203
類群: 似鳥龍類
科 / 演化支: Deinocheiridae3
分類: Theropoda > Ornithomimosauria3
岩石的年代: 84 到 72 百萬年 (Campanian)3
岩層: Cerro del Pueblo3
國家: 墨西哥3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Paraxenisaurus was named in 2020 by Mexican paleontologists Claudia Serrano-Brañas and colleagues, based on bones collected in the 1990s from three sites in Coahuila, Mexico.1
仍有爭議: Scientists are not sure how big Paraxenisaurus grew, because only a few bones have been found.1