恐龍卡第 1798 張，共 2 027 張

Tiamat

名字的意思： “named after Tiamat, the serpentine goddess of Sumerian and Babylonian mythology”1

吃：植物長脖子恐龍白堊紀早期到白堊紀晚期

Tiamat was a long-necked, plant-eating dinosaur that lived in what is now Brazil. It had a small head, a very long tail, and walked on four sturdy legs. Scientists think it was one of the earliest titanosaurs, the group that includes some of the biggest dinosaurs ever.1 3

生存年代

113 到 94 百萬年前3

白堊紀早期到白堊紀晚期

化石發現地

Açu Formation, Potiguar Basin, Ceará state, Brazil1 3

長度

10 到 100 m (33 到 328 ft)2

最高速度

時速約 15 公里（9 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？

跟 22 台汽車排成一排一樣長跟 560 根香蕉頭尾相接一樣長能在 24 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Tiamat 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)

Tiamat 時速約 15 公里 (9 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

Tiamat is the first dinosaur ever named from the Potiguar Basin in Brazil, though other dinosaur remains have been found there.1

The only known fossils of Tiamat are nine tail vertebrae from the beginning and middle of the tail.1

Tiamat lived during the middle Cretaceous period, about 113 to 94 million years ago.2

Scientists think Tiamat was a basal titanosaur, meaning it was an early relative of the giant titanosaurs like Argentinosaurus.1

An isolated titanosaur osteoderm (a bony plate in the skin) found in 2018 might also belong to Tiamat.1

The species name valdecii honors Dr. Valdeci dos Santos Júnior, who discovered the fossil site.1

Tiamat 的 AI 繪圖 — 這是電腦根據科學家目前的知識，用 AI 畫出 Tiamat 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: Tiamat
命名者: Pereira et al. 20243
類群: 長脖子恐龍
科 / 演化支: Titanosauria3
分類: Sauropodomorpha > Sauropoda > Titanosauria > Macronaria3
岩石的年代: 113 到 94 百萬年 (Albian / Cenomanian)3
岩層: Açu3
國家: 巴西3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Tiamat was named in 2024 by Pereira and colleagues based on nine tail vertebrae found in the Açu Formation of Brazil. The fossils were discovered by Dr. Valdeci dos Santos Júnior.1
仍有爭議: Scientists are not sure exactly how big Tiamat was, because only tail bones have been found. They also debate whether an isolated osteoderm belongs to this dinosaur.1 2