恐龍卡第 1619 張，共 2 027 張

Seitaad

名字的意思： “sand monster in Navajo folklore”1

吃：植物長脖子恐龍侏羅紀早期

Seitaad was an early long-necked dinosaur that lived about 190 million years ago. It was a plant-eater that walked on two legs and could also use all fours. This dinosaur is one of the most complete fossils ever found in the Navajo Sandstone of Utah.3 1

生存年代

193 到 175 百萬年前3

侏羅紀早期

化石發現地

San Juan County, Utah, USA3 1

長度

3 到 4.5 m (9.8 到 15 ft)2

體重

70 kg 到 90 kg (154 到 198 lb)2

高度

0.91 到 1.22 m (3 到 4 ft)2

最高速度

時速約 41 公里（25 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 4 隻狗一樣重

跟 4 隻狗從鼻子接到尾巴一樣長跟 25 根香蕉頭尾相接一樣長跟 18 顆西瓜一樣重跟 5 個幼兒園小朋友一樣重跟 3 個小學生一樣重能在 8.8 秒內跑完 100 公尺（最快的人類要 9.6 秒）

Seitaad 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)

Seitaad 時速約 41 公里 (25 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

Seitaad's name comes from a Navajo legend about a sand monster that buried its victims in dunes.1

The only known fossil of Seitaad was found at the base of a collapsed sand dune, which may have buried the animal after it died.1

Seitaad is one of the few early sauropodomorph dinosaurs known from North America.1

The species name ruessi honors Everett Ruess, a young artist and explorer who disappeared in southern Utah in 1934.1

Seitaad had a plate-like bone on its shoulder blade that helped support its arm.1

This dinosaur lived during the Early Jurassic period, when the climate was warm and deserts covered much of the area.1

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

?How big was Seitaad?

About 3 to 4.5 metres long and 1 metre tall at the hips. It weighed around 70 to 90 kilograms, about the size of a large human.2

?What did Seitaad eat?

Seitaad ate plants. It had leaf-shaped teeth and a small head, just like its later giant relatives the sauropods.2

?Could Seitaad walk on two legs?

Yes, Seitaad could walk on two legs or on all fours. It had a long neck and tail, and a large curved claw on its thumb.2

?When did Seitaad live?

Seitaad lived during the Early Jurassic Period, about 183 to 190 million years ago. That is millions of years before the famous giant sauropods like Diplodocus.2

給恐龍專家

學名: Seitaad
命名者: Sertich and Loewen 20103
類群: 長脖子恐龍
科 / 演化支: Sauropodiformes3
分類: Sauropodomorpha3
岩石的年代: 193 到 175 百萬年 (Pliensbachian / Toarcian)3
岩層: Navajo Sandstone3
國家: 美國3
化石紀錄: The Paleobiology Database 收錄 1 筆3
發現: Seitaad was named by scientists Joseph Sertich and Michael Loewen in 2010. The partial skeleton was found in the Navajo Sandstone of southern Utah, near a cliff dwelling called Eagle's Nest.3 1
仍有爭議: Scientists are not sure exactly how Seitaad is related to other early sauropodomorphs, because its fossils do not give a clear family tree.1