恐龍卡第 0349 張，共 2 027 張

Cariocecus

名字的意思： “named after the Iberian war god Cariocecus”1

吃：植物有喙的草食恐龍白堊紀早期

Cariocecus was a medium-sized plant-eating dinosaur that lived in what is now Portugal. It had a bony brow over its eye that made it look like an eagle, and its upper jaw bones were fused together to help it chew tough plants.1

生存年代

126 到 121 百萬年前4

白堊紀早期

化石發現地

Praia do Areia do Mastro, Sesimbra, Portugal4 1

長度

5 到 7 m (16 到 23 ft)3

體重

最多 600 kg (1,300 lb)3

高度

2.1 m (6.9 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 7 隻狗從鼻子接到尾巴一樣長跟 39 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）

Cariocecus 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)

Cariocecus 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

Cariocecus is the first iguanodontian skull ever found in Portugal.1

The skull of Cariocecus was about 45 centimetres (18 inches) long, and the animal was not fully grown when it died.2

Its maxilla and jugal bones were completely fused together, which is unique among all ornithopods.1

Cariocecus had a large bony brow over its eye that may have protected it from sun glare and injury.1

Scientists used micro-CT scanning to study the inside of the skull, including the brain and inner ear.2

Cariocecus lived alongside the spinosaurid Iberospinus and other dinosaurs in a shallow coastal environment.1

The fossil was discovered in 2016 by Pedro Marrecas and was named in 2025.1

Cariocecus 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Cariocecus 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。

給恐龍專家

學名: Cariocecus
命名者: Bertozzo et al. 20254
類群: 有喙的草食恐龍
科 / 演化支: Hadrosauroidea4
分類: Ornithischia > Ornithopoda > Iguanodontia4
岩石的年代: 126 到 121 百萬年 (Barremian)4
岩層: Papo Seco4
國家: 葡萄牙4
化石紀錄: The Paleobiology Database 收錄 1 筆4
發現: The only known skull was found in 2016 by Pedro Marrecas in a limestone outcrop in Portugal. It was named Cariocecus bocagei in 2025 by Filippo Bertozzo and colleagues.1
仍有爭議: Scientists are not sure exactly how large Cariocecus grew, because the only known fossil is from a young individual.1