恐龍卡第 0902 張，共 2 027 張

Jaxartosaurus

名字的意思： “Jaxartes River lizard”1

吃：植物鴨嘴龍類白堊紀晚期

Jaxartosaurus was a duck-billed dinosaur that lived in what is now Kazakhstan and China. It had a helmet-like crest on its head and ate plants.1 5

生存年代

90 到 84 百萬年前5

白堊紀晚期

化石發現地

Kazakhstan and China1 5

長度

9 m (30 ft)1

體重

600 kg (1,300 lb)3

高度

3.1 m (10 ft)

估計值

最高速度

時速約 37 公里（23 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 2 台汽車排成一排一樣長跟 50 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 9.7 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Jaxartosaurus 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)

Jaxartosaurus 時速約 37 公里 (23 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

Jaxartosaurus is known only from a skull roof and braincase, so scientists have limited information about its body.1

It had a helmet-like crest on its head, which was probably made of the premaxillae and nasals bones.2

Jaxartosaurus lived during the Late Cretaceous, about 94 to 84 million years ago.1

Its skull was wide and low, with large frontals that were isolated from the edge of the eye socket.2

The lower jaw of Jaxartosaurus had 34 to 35 rows of teeth, which helped it grind plants.2

Jaxartosaurus is one of the oldest known lambeosaurine hadrosaurs, helping scientists understand the early evolution of duck-billed dinosaurs.2

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

?How big was Jaxartosaurus?

About 9 metres (30 feet) long. That is roughly the length of a school bus.1

?What did Jaxartosaurus eat?

It ate plants. It was an herbivore that used its 34 to 35 rows of teeth to grind up low-lying plants.1 4

?Did Jaxartosaurus have a crest?

Yes, it had a helmet-like crest on its head. It may have used the crest for visual identification or to make sounds to communicate with others of its kind.4 2

?When did Jaxartosaurus live?

It lived during the Late Cretaceous, about 94 to 84 million years ago.1

給恐龍專家

學名: Jaxartosaurus
命名者: Riabinin 19375
類群: 鴨嘴龍類
科 / 演化支: Hadrosauridae5
分類: Ornithischia > Ornithopoda > Iguanodontia > Hadrosauridae5
岩石的年代: 90 到 84 百萬年 (Coniacian / Santonian)5
岩層: Dabrazhin, Ulungar5
國家: 哈薩克, 中國5
化石紀錄: The Paleobiology Database 收錄 2 筆5
發現: Jaxartosaurus was named by Russian paleontologist Anatoly Riabinin in 1937, based on a skull found in southern Kazakhstan.5 1
仍有爭議: Scientists are not sure exactly how the crest of Jaxartosaurus looked, because the crest was mostly destroyed in the only known skull.2