恐龍卡第 1932 張，共 2 027 張

Xenotarsosaurus

名字的意思： “strange ankle lizard”1

吃：肉肉食恐龍白堊紀晚期

Xenotarsosaurus was a meat-eating dinosaur that stomped around Argentina during the Late Cretaceous. It had a very strange ankle that looked different from other dinosaurs, which is how it got its name.1

生存年代

100 到 90 百萬年前2

白堊紀晚期

化石發現地

Chubut province, Argentina1 2

長度

5.4 到 6 m (18 到 20 ft)1

體重

430 kg 到 750 kg (948 到 1,700 lb)1

高度

1.9 m (6.2 ft)

估計值

最高速度

時速約 41 公里（25 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 38 隻狗一樣重

跟 6 隻狗從鼻子接到尾巴一樣長跟 33 根香蕉頭尾相接一樣長跟 150 顆西瓜一樣重跟 39 個幼兒園小朋友一樣重跟 23 個小學生一樣重能在 8.8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Xenotarsosaurus 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)

Xenotarsosaurus 時速約 41 公里 (25 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

Xenotarsosaurus is known from only a few bones: two back vertebrae and a right hind leg.1

Its ankle bones were completely fused together, which is very unusual and gave the dinosaur its name.1

Scientists think Xenotarsosaurus was about 5.4 to 6 meters long, as long as a small bus.1

It weighed between 430 and 750 kilograms, about as much as a large cow or a small car.1

Xenotarsosaurus lived around 95 million years ago, during the Late Cretaceous period.1

Its fossils were found near a ranch called Ocho Hermanos in Argentina.1

Some scientists think Xenotarsosaurus was a close relative of Carnotaurus, another horned meat-eater.1

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

?What did Xenotarsosaurus eat?

It was a meat-eater, like other theropods.1

?How big was Xenotarsosaurus?

Scientists estimate it was about 5.4 to 6 meters (18 to 20 feet) long, as long as a small bus, and weighed between 430 and 750 kilograms (950 to 1,650 pounds), as much as a large cow or a small car.1

?Where did Xenotarsosaurus live?

It lived in what is now Argentina, in the Chubut province. Its fossils were found in the Bajo Barreal Formation.1

?When did Xenotarsosaurus live?

It lived during the Late Cretaceous period, about 95 million years ago.1

給恐龍專家

學名: Xenotarsosaurus
命名者: Martínez et al. 19862
類群: 肉食恐龍
科 / 演化支: Abelisauridae2
分類: Theropoda > Ceratosauria > Abelisauridae2
岩石的年代: 100 到 90 百萬年 (Cenomanian / Turonian)2
岩層: Bajo Barreal2
國家: 阿根廷2
化石紀錄: The Paleobiology Database 收錄 1 筆2
發現: Xenotarsosaurus was named in 1986 by Rubén Martínez and his team. The fossils were found by geologist Juan Carlos Sciutto in 1980, and more bones were later collected by paleontologist José Bonaparte.1
仍有爭議: Scientists are not sure exactly how Xenotarsosaurus is related to other abelisaurids. Some think it is a true abelisaurid, while others say it might be a more primitive neoceratosaurian.1