恐龍卡第 1556 張，共 2 027 張

Riojavenatrix

名字的意思： “hunter from La Rioja”5

吃：肉棘龍類白堊紀早期

Riojavenatrix was a meat-eating dinosaur that lived in what is now Spain. It was a spinosaur, a type of dinosaur with a crocodile-like snout that probably ate fish. This dinosaur was one of the last spinosaurs to live in Europe.5 1

生存年代

121 到 120 百萬年前5

白堊紀早期

化石發現地

Igea, La Rioja, Spain5 1

長度

7 到 8 m (23 到 26 ft)2 3

體重

1.5 公噸 (3,300 lb)3

高度

3 m (9.8 ft)2

最高速度

時速約 26 公里（16 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？

牠有多重？

跟 1 台汽車一樣重

跟 8 隻狗從鼻子接到尾巴一樣長跟 44 根香蕉頭尾相接一樣長跟 75 隻狗一樣重跟 300 顆西瓜一樣重跟 79 個幼兒園小朋友一樣重跟 47 個小學生一樣重跟 3 隻北極熊一樣重能在 14 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Riojavenatrix 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)

Riojavenatrix 時速約 26 公里 (16 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

Riojavenatrix was named in 2024, making it a very recently discovered dinosaur.5

It lived about 121 to 119 million years ago, during the Early Cretaceous period.5

Riojavenatrix is known from bones of the spine, hips, and hind legs.1

Its thigh bone had a special shape that was halfway between older theropods and later spinosaurs.1

This dinosaur is one of the youngest baryonychines, a group of spinosaurs, ever found.1

Riojavenatrix lived in a lake environment, and its species name 'lacustris' means 'of the lake'.1

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

?How big was Riojavenatrix?

A subadult was about 7 to 8 metres long. An adult probably reached about 9 metres long and 3 metres tall.2

?What did Riojavenatrix eat?

It was a meat-eater, and like other spinosaurs it probably ate fish.2

?When did Riojavenatrix live?

It lived about 120 million years ago, during the Early Cretaceous period.2

?Where was Riojavenatrix found?

Its fossils were found in La Rioja, Spain, at the Virgen del Villar-1 site.4

給恐龍專家

學名: Riojavenatrix
命名者: Isasmendi et al. 20245
類群: 棘龍類
科 / 演化支: Spinosauridae5
分類: Theropoda > Spinosauridae5
岩石的年代: 121 到 120 百萬年 (Aptian)5
國家: 西班牙5
化石紀錄: The Paleobiology Database 收錄 1 筆5
發現: Riojavenatrix was named by a team of scientists led by E. Isasmendi in 2024. The fossils were found in the Enciso Group of the Cameros Basin in La Rioja, Spain.5 1
仍有爭議: Scientists are still debating exactly how Riojavenatrix is related to other spinosaurs, because it has a mix of features from different groups.1