恐龍卡第 0324 張，共 2 027 張

Caiuajara

名字的意思： “named after the Caiuá desert where it was found”1

吃：植物飛行爬蟲類白堊紀早期到白堊紀晚期嚴格來說不是恐龍

Caiuajara was a flying reptile that lived in a hot desert. It had a big crest on its head that grew steeper as it got older. Dozens of Caiuajara fossils were found together, showing they lived in colonies.1

趣味小知識：翼龍在恐龍頭上飛來飛去，但牠們是恐龍的親戚，不是恐龍喔。

生存年代

121 到 72 百萬年前4

白堊紀早期到白堊紀晚期

化石發現地

Cruzeiro do Oeste, Paraná State, southern Brazil1

翼展

0.65 到 2.35 m (2.1 到 7.7 ft)1

最高速度

時速約 52 公里（32 英里）

飛行, 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？

牠的翅膀有多寬？

跟 5 隻家貓從鼻子接到尾巴一樣長能在 7.3 秒內飛越一整座足球場

Caiuajara 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)

Caiuajara 時速約 52 公里 (32 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

Caiuajara is the first pterosaur found in southern Brazil. All other Brazilian pterosaurs come from the northeast.1

At least 47 individuals were found in one bone bed, which is very rare for pterosaurs.1

Young Caiuajara had a small, slanted head crest (about 115°). Adults had a larger, steeper crest (about 90°).1

Caiuajara could probably fly at a very young age. This is called being precocial.1

It lived around an oasis lake in a Cretaceous desert. Storms may have carried dead pterosaurs into the lake.1

Caiuajara belongs to a group called Tapejaridae, which had no teeth and are thought to have eaten fruit.1

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

?How big was Caiuajara?

The largest Caiuajara had a wingspan of about 2.35 meters (7.7 feet). The smallest juveniles had a wingspan of about 0.65 meters (2.1 feet).1 3

?Did Caiuajara have teeth?

No, Caiuajara had no teeth. It belonged to a group of toothless pterosaurs called Tapejaridae.1 3

?What did Caiuajara eat?

Scientists think Caiuajara ate fruit, because other tapejarid pterosaurs are thought to have been frugivorous. However, no direct food remains have been found with the fossils.1 3

?Could Caiuajara fly?

Yes, Caiuajara could fly. Even very young individuals had well-developed flight muscles and could probably fly soon after hatching.1 3

?Where was Caiuajara found?

Caiuajara fossils were found in southern Brazil, near the town of Cruzeiro do Oeste in the state of Paraná. It is the first pterosaur discovered in southern Brazil.1 3

?Why did Caiuajara have a crest?

The crest on Caiuajara's head probably helped with display, like attracting mates or recognizing other members of its species. The crest grew larger and steeper as the animal got older.1 3

給恐龍專家

學名: Caiuajara
命名者: Manzig et al. 20144
類群: 飛行爬蟲類
科 / 演化支: Tapejaridae4
分類: Pterosauria > Pterodactyloidea4
岩石的年代: 121 到 72 百萬年 (Aptian / Campanian)4
岩層: Goio-Erê4
國家: 巴西4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: Caiuajara was named in 2014 by Manzig and colleagues. The fossils were found near Cruzeiro do Oeste in southern Brazil.2 1
仍有爭議: Scientists are not sure exactly how old the rocks are. Caiuajara could be the youngest known tapejarid pterosaur, or the rocks might be older than thought.1